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Removing the Cloak of Secrecy from Legacy Cleanup at Los Alamos national Laboratory - 20395

With the establishment in 2018 of the Los Alamos Legacy Cleanup Contract, the Department of Energy's (DOE) Environmental Management Los Alamos Field Office (EM-LA) and its contractor Newport News Nuclear BWXT Los Alamos (N3B) embarked on an expansive program to engage a broad range of local and regional stakeholders in the decision-making process for cleanup of legacy wastes (pre-1999) at the Los Alamos National Laboratory (LANL). From the inception of LANL during the Manhattan Project until the issuance of the new cleanup contract, the site was managed by a single management and operations (M and O) contactor whose main focus was national security. Segmenting from laboratory operations a separate cleanup contract managed by DoE's Office of Environmental Management (EM) brought new opportunities for the cleanup of legacy waste. That change likewise has opened new opportunities for engaging the community on legacy cleanup decisions. The new legacy cleanup contract - an unclassified contract - emphasizes public outreach, marking a cultural shift in how stakeholders in Los Alamos and throughout northern New Mexico are engaged. Without the constraints of classified work, EM-LA and N3B have increased the level of transparency with the public regarding cleanup activities. EM-LA and N3B have crafted an approach that best meets the values, priorities and needs of the neighboring communities by adapting the model successfully employed at Rocky Flats. Through enhanced stakeholder involvement, EM-LA will implement decisions that have considered broad input and deliver a safe and efficient cleanup of the site. EM-LA and N3B began the expanded stakeholder outreach program in January 2019, leading up to four Environmental Management Cleanup Forums held in the summer of 2019. EM-LA and N3B are now in the process of initiating a series of meetings with various stakeholder groups to determine their 'values' as they relate to cleanup using a novel approach that elicits and records values. The entire process is documented, ensuring that should questions arise about how, when and why decisions were made, they can be easily addressed. In addition to other public meetings to present cleanup scenarios and solicit active public involvement in cleanup decisions, the EM-LA and N3B approach involves discussions with stakeholders who want to explore specific technical issues and cleanup discussions in depth. EM-LA and N3B are also evaluating and implementing a variety of communications tools to help ensure the engagement plan sets the gold standard for transparency in legacy cleanup and stakeholder involvement. (authors)

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE W↗

Impacts of Lanthanum Impurities on Nickel-Rich Cathode Materials

The widespread use of lithium-ion batteries (LIBs) has led to environmental concerns and exacerbated the scarcity of essential minerals, underscoring the urgent need for effective recycling strategies. Among various recycling methods, the hydrometallurgical process is distinguished by its energy efficiency and minimal environmental impact. Nickel-metal hydride (Ni-MH) batteries are a significant source of nickel sulfate (NiSO 4 ) for hydrometallurgical recycling due to their substantial nickel content. A significant challenge arises from the effective separation of lanthanum (La), which results in at least 20 ppm of La being present in the recycled NiSO 4 . This study explores a critical aspect of the recycling process: the impact of La 3+ impurities, introduced through recycled NiSO 4 , on the performance of the synthesized nickel-rich cathode materials. We conducted a thorough investigation into how La 3+ influences morphology and structural integrity during both the synthesis of precursors and the production of cathode materials. Our findings indicate that La 3+ impurities do not adversely affect the morphology or structural integrity of the cathode precursors relative to virgin materials. However, higher concentrations of La 3+ reduce the discharge capacity with enhanced cycle stability by minimizing cation mixing between lithium (Li + ) and nickel (Ni 2+ ) ions within the cathode. Furthermore, this stability is crucial for extending battery life. Therefore, controlling the concentration of La 3+ impurities is essential for optimizing the electrochemical performance of recycled cathode materials.

Corrosion↗

Materials Data on LaAl4Co by Materials Project

LaCoAl4 crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. La is bonded in a 1-coordinate geometry to one Co and twelve Al atoms. The La–Co bond length is 3.02 Å. There are a spread of La–Al bond distances ranging from 3.15–3.33 Å. Co is bonded in a 9-coordinate geometry to one La and eight Al atoms. There are two shorter (2.31 Å) and six longer (2.57 Å) Co–Al bond lengths. There are three inequivalent Al sites. In the first Al site, Al is bonded in a linear geometry to two equivalent La, two equivalent Co, and eight Al atoms. There are four shorter (2.82 Å) and four longer (2.93 Å) Al–Al bond lengths. In the second Al site, Al is bonded in a 4-coordinate geometry to two equivalent La, two equivalent Co, and eight Al atoms. There are two shorter (2.73 Å) and two longer (3.02 Å) Al–Al bond lengths. In the third Al site, Al is bonded in a 2-coordinate geometry to four equivalent La, two equivalent Co, and six Al atoms. There are one shorter (2.76 Å) and one longer (3.12 Å) Al–Al bond lengths.

36 MATERIALS SCIENCE↗

Materials Data on LaPIr by Materials Project

LaIrP is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. La is bonded to six equivalent Ir and six equivalent P atoms to form a mixture of edge and face-sharing LaP6Ir6 cuboctahedra. There are two shorter (3.12 Å) and four longer (3.21 Å) La–Ir bond lengths. There are four shorter (3.16 Å) and two longer (3.23 Å) La–P bond lengths. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 9-coordinate geometry to six equivalent La and three equivalent P atoms. All Ir–P bond lengths are 2.40 Å. In the second Ir site, Ir is bonded in a 9-coordinate geometry to six equivalent La and three equivalent P atoms. There are two shorter (3.12 Å) and four longer (3.21 Å) Ir–La bond lengths. All Ir–P bond lengths are 2.40 Å. P is bonded in a 9-coordinate geometry to six equivalent La and three equivalent Ir atoms.

36 MATERIALS SCIENCE↗

Materials Data on La2B4Rh5 by Materials Project

La2Rh5B4 crystallizes in the orthorhombic Fmmm space group. The structure is three-dimensional. La is bonded in a 8-coordinate geometry to ten Rh and six equivalent B atoms. There are a spread of La–Rh bond distances ranging from 3.13–3.31 Å. There are two shorter (3.05 Å) and four longer (3.22 Å) La–B bond lengths. There are three inequivalent Rh sites. In the first Rh site, Rh is bonded in a 4-coordinate geometry to four equivalent La and four equivalent B atoms. All Rh–B bond lengths are 2.14 Å. In the second Rh site, Rh is bonded in a distorted square co-planar geometry to four equivalent La and four equivalent B atoms. All Rh–B bond lengths are 2.21 Å. In the third Rh site, Rh is bonded in a distorted square co-planar geometry to four equivalent La and four equivalent B atoms. All Rh–B bond lengths are 2.20 Å. B is bonded in a 5-coordinate geometry to three equivalent La and five Rh atoms.

36 MATERIALS SCIENCE↗

Materials Data on LaTm(Ge2Ir)2 by Materials Project

TmLa(IrGe2)2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Tm is bonded in a 8-coordinate geometry to six equivalent Ir and nine Ge atoms. There are two shorter (3.23 Å) and four longer (3.27 Å) Tm–Ir bond lengths. There are a spread of Tm–Ge bond distances ranging from 2.97–3.49 Å. La is bonded in a 8-coordinate geometry to four equivalent Ir and ten Ge atoms. All La–Ir bond lengths are 3.26 Å. There are a spread of La–Ge bond distances ranging from 3.32–3.44 Å. Ir is bonded in a 10-coordinate geometry to three equivalent Tm, two equivalent La, and five Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.49–2.60 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to three equivalent Tm, one La, three equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.70 Å. In the second Ge site, Ge is bonded in a 2-coordinate geometry to one Tm, four equivalent La, and two equivalent Ir atoms. In the third Ge site, Ge is bonded in a 9-coordinate geometry to two equivalent Tm, four equivalent La, two equivalent Ir, and one Ge atom. The Ge–Ge bond length is 2.60 Å.

36 MATERIALS SCIENCE↗

Materials Data on LaIn4Ni by Materials Project

LaNiIn4 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. La is bonded in a 9-coordinate geometry to two equivalent Ni and thirteen In atoms. Both La–Ni bond lengths are 3.53 Å. There are a spread of La–In bond distances ranging from 3.32–3.71 Å. Ni is bonded in a 9-coordinate geometry to two equivalent La and seven In atoms. There are a spread of Ni–In bond distances ranging from 2.55–2.79 Å. There are three inequivalent In sites. In the first In site, In is bonded in a 10-coordinate geometry to four equivalent La and six In atoms. There are four shorter (3.20 Å) and two longer (3.24 Å) In–In bond lengths. In the second In site, In is bonded in a 2-coordinate geometry to three equivalent La, one Ni, and four equivalent In atoms. In the third In site, In is bonded in a 12-coordinate geometry to three equivalent La, three equivalent Ni, and one In atom.

36 MATERIALS SCIENCE↗

Materials Data on SrLa4TiAl4O15 by Materials Project

SrLa4TiAl4O15 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share corners with six equivalent SrO12 cuboctahedra, corners with six LaO12 cuboctahedra, faces with two equivalent LaO12 cuboctahedra, faces with four equivalent SrO12 cuboctahedra, faces with two equivalent AlO6 octahedra, and faces with six equivalent TiO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.71–2.90 Å. There are five inequivalent La3+ sites. In the first La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with five equivalent SrO12 cuboctahedra, corners with seven LaO12 cuboctahedra, faces with two equivalent SrO12 cuboctahedra, faces with four LaO12 cuboctahedra, faces with two equivalent TiO6 octahedra, and faces with six AlO6 octahedra. There are a spread of La–O bond distances ranging from 2.65–2.72 Å. In the second La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share a cornercorner with one SrO12 cuboctahedra, corners with eleven LaO12 cuboctahedra, faces with six LaO12 cuboctahedra, and faces with eight AlO6 octahedra. There are a spread of La–O bond distances ranging from 2.62–2.72 Å. In the third La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with twelve LaO12 cuboctahedra, faces with six LaO12 cuboctahedra, and faces with eight AlO6 octahedra. There are two shorter (2.69 Å) and ten longer (2.71 Å) La–O bond lengths. In the fourth La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with twelve LaO12 cuboctahedra, faces with six LaO12 cuboctahedra, and faces with eight AlO6 octahedra. There are one shorter (2.69 Å) and eleven longer (2.71 Å) La–O bond lengths. In the fifth La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with twelve LaO12 cuboctahedra, faces with six LaO12 cuboctahedra, and faces with eight AlO6 octahedra. There are one shorter (2.69 Å) and eleven longer (2.71 Å) La–O bond lengths. Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent AlO6 octahedra, corners with four equivalent TiO6 octahedra, faces with two equivalent LaO12 cuboctahedra, and faces with six equivalent SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–3°. There are a spread of Ti–O bond distances ranging from 1.92–1.96 Å. There are four inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with two equivalent TiO6 octahedra, corners with four AlO6 octahedra, faces with two equivalent SrO12 cuboctahedra, and faces with six LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–3°. There are a spread of Al–O bond distances ranging from 1.90–1.92 Å. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six AlO6 octahedra and faces with eight LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There is four shorter (1.90 Å) and two longer (1.92 Å) Al–O bond length. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six AlO6 octahedra and faces with eight LaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. There is four shorter (1.91 Å) and two longer (1.92 Å) Al–O bond length. In the fourth Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six AlO6 octahedra and faces with eight LaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. There is four shorter (1.91 Å) and two longer (1.92 Å) Al–O bond length. There are thirteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to three equivalent Sr2+, one La3+, and two equivalent Ti4+ atoms. The O–La bond length is 2.72 Å. In the second O2- site, O2- is bonded in a distorted linear geometry to three equivalent Sr2+, one La3+, and two equivalent Ti4+ atoms. Both O–Ti bond lengths are 1.92 Å. In the third O2- site, O2- is bonded in a distorted linear geometry to one Sr2+, three La3+, and two equivalent Al3+ atoms. The O–Sr bond length is 2.77 Å. In the fourth O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two equivalent Al3+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two equivalent Al3+ atoms. In the sixth O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two equivalent Al3+ atoms. In the seventh O2- site, O2- is bonded in a distorted linear geometry to four equivalent Sr2+ and two equivalent Ti4+ atoms. In the eighth O2- site, O2- is bonded in a distorted linear geometry to two equivalent Sr2+, two equivalent La3+, one Ti4+, and one Al3+ atom. In the ninth O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two Al3+ atoms. In the tenth O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two Al3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two Al3+ atoms. In the twelfth O2- site, O2- is bonded in a distorted linear geometry to four La3+ and two equivalent Al3+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted linear geometry to one Sr2+, three La3+, and two equivalent Al3+ atoms. There are one shorter (2.62 Å) and two longer (2.71 Å) O–La bond lengths. Both O–Al bond lengths are 1.92 Å.

36 MATERIALS SCIENCE↗

Materials Data on SrLa7TiGa7O24 by Materials Project

SrLa7TiGa7O24 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–3.14 Å. There are six inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–3.03 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–3.05 Å. In the third La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–3.05 Å. In the fourth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.98 Å. In the fifth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–3.04 Å. In the sixth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.41–3.06 Å. Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two GaO6 octahedra and corners with four equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 15–22°. There are a spread of Ti–O bond distances ranging from 1.95–2.03 Å. There are seven inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share a cornercorner with one TiO6 octahedra and corners with five GaO6 octahedra. The corner-sharing octahedra tilt angles range from 18–25°. There are a spread of Ga–O bond distances ranging from 1.99–2.04 Å. In the second Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share a cornercorner with one TiO6 octahedra and corners with five GaO6 octahedra. The corner-sharing octahedra tilt angles range from 18–24°. There are a spread of Ga–O bond distances ranging from 2.00–2.05 Å. In the third Ga3+ site, Ga3+ is bonded to six O2- atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedra tilt angles range from 23–25°. There are a spread of Ga–O bond distances ranging from 2.00–2.02 Å. In the fourth Ga3+ site, Ga3+ is bonded to six O2- atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedra tilt angles range from 23–26°. All Ga–O bond lengths are 2.01 Å. In the fifth Ga3+ site, Ga3+ is bonded to six O2- atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedra tilt angles range from 23–26°. There are five shorter (2.01 Å) and one longer (2.02 Å) Ga–O bond lengths. In the sixth Ga3+ site, Ga3+ is bonded to six O2- atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedra tilt angles range from 23–26°. There are five shorter (2.01 Å) and one longer (2.02 Å) Ga–O bond lengths. In the seventh Ga3+ site, Ga3+ is bonded to six O2- atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedra tilt angles range from 23–26°. There are five shorter (2.01 Å) and one longer (2.02 Å) Ga–O bond lengths. There are twenty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ti4+, and one Ga3+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and two Ga3+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three equivalent La3+ and two Ga3+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and two Ga3+ atoms. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Ga3+ atoms. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, and two equivalent Ti4+ atoms. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent La3+ and two equivalent Ga3+ atoms. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Ga3+ atoms. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+, two equivalent La3+, one Ti4+, and one Ga3+ atom. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and two Ga3+ atoms. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and two Ga3+ atoms. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+, two equivalent La3+, and two equivalent Ti4+ atoms. In the seventeenth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Ga3+ atoms. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. The O–La bond length is 2.85 Å. In the nineteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms. In the twenty-first O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, three La3+, and two Ga3+ atoms. In the twenty-second O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Ga3+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on LaCu6 by Materials Project

LaCu6 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. La is bonded in a 6-coordinate geometry to nineteen Cu atoms. There are a spread of La–Cu bond distances ranging from 2.94–3.41 Å. There are five inequivalent Cu sites. In the first Cu site, Cu is bonded in a 12-coordinate geometry to four equivalent La and ten Cu atoms. There are a spread of Cu–Cu bond distances ranging from 2.55–3.11 Å. In the second Cu site, Cu is bonded to three equivalent La and nine Cu atoms to form a mixture of face, edge, and corner-sharing CuLa3Cu9 cuboctahedra. There are a spread of Cu–Cu bond distances ranging from 2.47–2.63 Å. In the third Cu site, Cu is bonded in a 12-coordinate geometry to three equivalent La and nine Cu atoms. There are a spread of Cu–Cu bond distances ranging from 2.52–3.06 Å. In the fourth Cu site, Cu is bonded to three equivalent La and nine Cu atoms to form a mixture of face, edge, and corner-sharing CuLa3Cu9 cuboctahedra. There are one shorter (2.49 Å) and one longer (2.62 Å) Cu–Cu bond lengths. In the fifth Cu site, Cu is bonded in a 3-coordinate geometry to three equivalent La and eight Cu atoms.

36 MATERIALS SCIENCE↗

Materials Data on LaTb3 by Materials Project

Tb3La is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are three inequivalent Tb sites. In the first Tb site, Tb is bonded to eight equivalent Tb and four equivalent La atoms to form TbLa4Tb8 cuboctahedra that share corners with four equivalent LaTb12 cuboctahedra, corners with fourteen TbLa4Tb8 cuboctahedra, edges with six equivalent LaTb12 cuboctahedra, edges with twelve equivalent TbLa4Tb8 cuboctahedra, faces with four equivalent LaTb12 cuboctahedra, and faces with sixteen TbLa4Tb8 cuboctahedra. There are a spread of Tb–Tb bond distances ranging from 3.58–3.70 Å. There are two shorter (3.61 Å) and two longer (3.66 Å) Tb–La bond lengths. In the second Tb site, Tb is bonded to eight Tb and four equivalent La atoms to form TbLa4Tb8 cuboctahedra that share corners with four equivalent LaTb12 cuboctahedra, corners with fourteen TbLa4Tb8 cuboctahedra, edges with six equivalent LaTb12 cuboctahedra, edges with twelve TbLa4Tb8 cuboctahedra, faces with four equivalent LaTb12 cuboctahedra, and faces with sixteen TbLa4Tb8 cuboctahedra. There are a spread of Tb–Tb bond distances ranging from 3.58–3.70 Å. There are two shorter (3.61 Å) and two longer (3.66 Å) Tb–La bond lengths. In the third Tb site, Tb is bonded to eight equivalent Tb and four equivalent La atoms to form TbLa4Tb8 cuboctahedra that share corners with four equivalent LaTb12 cuboctahedra, corners with fourteen TbLa4Tb8 cuboctahedra, edges with six equivalent LaTb12 cuboctahedra, edges with twelve equivalent TbLa4Tb8 cuboctahedra, faces with four equivalent LaTb12 cuboctahedra, and faces with sixteen TbLa4Tb8 cuboctahedra. There are two shorter (3.61 Å) and two longer (3.66 Å) Tb–La bond lengths. La is bonded to twelve Tb atoms to form LaTb12 cuboctahedra that share corners with six equivalent LaTb12 cuboctahedra, corners with twelve TbLa4Tb8 cuboctahedra, edges with eighteen TbLa4Tb8 cuboctahedra, faces with eight equivalent LaTb12 cuboctahedra, and faces with twelve TbLa4Tb8 cuboctahedra.

36 MATERIALS SCIENCE↗

Materials Data on La6Mg22Al by Materials Project

La6Mg22Al crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are three inequivalent Mg sites. In the first Mg site, Mg is bonded in a 1-coordinate geometry to six Mg, three equivalent La, and one Al atom. All Mg–Mg bond lengths are 3.19 Å. All Mg–La bond lengths are 3.48 Å. The Mg–Al bond length is 3.06 Å. In the second Mg site, Mg is bonded in a distorted q6 geometry to nine Mg and three equivalent La atoms. There are three shorter (2.98 Å) and three longer (3.25 Å) Mg–Mg bond lengths. All Mg–La bond lengths are 3.58 Å. In the third Mg site, Mg is bonded to eight Mg and four equivalent La atoms to form a mixture of corner and face-sharing MgLa4Mg8 cuboctahedra. All Mg–La bond lengths are 3.68 Å. La is bonded in a 12-coordinate geometry to twelve Mg atoms. Al is bonded in a body-centered cubic geometry to eight equivalent Mg atoms.

36 MATERIALS SCIENCE↗

Materials Data on La2CuO4 by Materials Project

La2CuO4 is (La,Ba)CuO4-like structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are six inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.32–3.04 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.32–2.99 Å. In the third La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.31–3.04 Å. In the fourth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.31–3.04 Å. In the fifth La3+ site, La3+ is bonded in a 2-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.32–2.79 Å. In the sixth La3+ site, La3+ is bonded in a 1-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.31–2.86 Å. There are three inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to six O2- atoms to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are a spread of Cu–O bond distances ranging from 1.91–2.46 Å. In the second Cu2+ site, Cu2+ is bonded to six O2- atoms to form distorted corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of Cu–O bond distances ranging from 1.89–2.49 Å. In the third Cu2+ site, Cu2+ is bonded to six O2- atoms to form corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of Cu–O bond distances ranging from 1.91–2.45 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded to four La3+ and two Cu2+ atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the second O2- site, O2- is bonded in a 6-coordinate geometry to five La3+ and one Cu2+ atom. In the third O2- site, O2- is bonded in a 6-coordinate geometry to five La3+ and one Cu2+ atom. In the fourth O2- site, O2- is bonded to four La3+ and two equivalent Cu2+ atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the fifth O2- site, O2- is bonded to four La3+ and two Cu2+ atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the sixth O2- site, O2- is bonded in a 6-coordinate geometry to five La3+ and one Cu2+ atom. In the seventh O2- site, O2- is bonded in a 6-coordinate geometry to five La3+ and one Cu2+ atom. In the eighth O2- site, O2- is bonded to four La3+ and two Cu2+ atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the ninth O2- site, O2- is bonded to four La3+ and two equivalent Cu2+ atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to four La3+ and one Cu2+ atom. In the eleventh O2- site, O2- is bonded to four La3+ and two Cu2+ atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the twelfth O2- site, O2- is bonded in a 6-coordinate geometry to five La3+ and one Cu2+ atom.

36 MATERIALS SCIENCE↗

Materials Data on SrLaCuRuO6 by Materials Project

SrLaCuRuO6 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are seven inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–2.91 Å. In the second Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.87 Å. In the third Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.96 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.85 Å. In the fifth Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.93 Å. In the sixth Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.95 Å. In the seventh Sr2+ site, Sr2+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.99 Å. There are seven inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.95 Å. In the second La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.95 Å. In the third La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.97 Å. In the fourth La3+ site, La3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of La–O bond distances ranging from 2.39–2.92 Å. In the fifth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–3.05 Å. In the sixth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.85 Å. In the seventh La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.42–2.90 Å. There are seven inequivalent Ru5+ sites. In the first Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with three equivalent RuO6 octahedra and corners with three equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 19–24°. There are a spread of Ru–O bond distances ranging from 1.95–2.02 Å. In the second Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six CuO6 octahedra. The corner-sharing octahedra tilt angles range from 16–29°. There are a spread of Ru–O bond distances ranging from 1.94–2.02 Å. In the third Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with three equivalent RuO6 octahedra and corners with three equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 19–22°. There are a spread of Ru–O bond distances ranging from 1.95–2.01 Å. In the fourth Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six CuO6 octahedra. The corner-sharing octahedra tilt angles range from 20–28°. There are a spread of Ru–O bond distances ranging from 1.94–2.01 Å. In the fifth Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six CuO6 octahedra. The corner-sharing octahedra tilt angles range from 20–27°. There are a spread of Ru–O bond distances ranging from 1.94–2.02 Å. In the sixth Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six CuO6 octahedra. The corner-sharing octahedra tilt angles range from 19–28°. There are a spread of Ru–O bond distances ranging from 1.94–2.03 Å. In the seventh Ru5+ site, Ru5+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six CuO6 octahedra. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Ru–O bond distances ranging from 1.95–2.02 Å. There are seven inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with three equivalent RuO6 octahedra and corners with three equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 11–22°. There are a spread of Cu–O bond distances ranging from 1.96–2.13 Å. In the second Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six RuO6 octahedra. The corner-sharing octahedra tilt angles range from 16–25°. There are a spread of Cu–O bond distances ranging from 2.04–2.13 Å. In the third Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six RuO6 octahedra. The corner-sharing octahedra tilt angles range from 21–29°. There are a spread of Cu–O bond distances ranging from 2.03–2.12 Å. In the fourth Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six RuO6 octahedra. The corner-sharing octahedra tilt angles range from 20–27°. There are a spread of Cu–O bond distances ranging from 2.04–2.13 Å. In the fifth Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six RuO6 octahedra. The corner-sharing octahedra tilt angles range from 19–28°. There are a spread of Cu–O bond distances ranging from 2.04–2.14 Å. In the sixth Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six RuO6 octahedra. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Cu–O bond distances ranging from 2.03–2.14 Å. In the seventh Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with three equivalent RuO6 octahedra and corners with three equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 11–28°. There are a spread of Cu–O bond distances ranging from 1.98–2.13 Å. There are forty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+, one Ru5+, and one Cu2+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to three Sr2+ and two Ru5+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+ and two Ru5+ atoms. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+ and two Ru5+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+, one Ru5+, and one Cu2+ atom. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the fifteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the seventeenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Ru5+, and one Cu2+ atom. In the nineteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the twenty-first O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the twenty-second O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the twenty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Ru5+, and one Cu2+ atom. In the twenty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the twenty-sixth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the twenty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the twenty-eighth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the twenty-ninth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the thirtieth O2- site, O2- is bonded in a 4-coordinate geometry to one Sr2+, two La3+, one Ru5+, and one Cu2+ atom. In the thirty-first O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Ru5+, and one Cu2+ atom. In the thirty-second O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the thirty-third O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Ru5+, and one Cu2+ atom. In the thirty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ru5+, and one Cu2+ atom. In the thirty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Ru5+, and one Cu2+ atom. In the thirty-sixth O2- site, O2- is bonded in a 4-coordinate geometry to one Sr2+, two La3+, one Ru5+, and one Cu2+ atom. In the thirty-seventh O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Cu2+ atoms. In the thirty-eighth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two equivalent La3+, one Ru5+, and one Cu2+ atom. In the thirty-ninth O2- site, O2- is bonded in a 6-coordinate geometry to one Sr2+, three La3+, and two Cu2+ atoms. In the fortieth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Ru5+, and one Cu2+ atom. In the forty-first O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Ru5+, and one Cu2+ atom. In the forty-second O2- site, O2- is bonded in a 3-coordinate geometry to three La3+ and two Cu2+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Sr3La7Ti3Mn7O30 by Materials Project

Sr3La7Ti3Mn7O30 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.53–2.89 Å. In the second Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.55–3.17 Å. In the third Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–2.87 Å. There are seven inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.43–2.83 Å. In the second La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.43–2.82 Å. In the third La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.82 Å. In the fourth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.45–2.84 Å. In the fifth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.42–2.84 Å. In the sixth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.82 Å. In the seventh La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.84 Å. There are three inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–22°. There are a spread of Ti–O bond distances ranging from 1.90–2.04 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–23°. There are a spread of Ti–O bond distances ranging from 1.93–2.03 Å. In the third Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent MnO6 octahedra and corners with four TiO6 octahedra. The corner-sharing octahedra tilt angles range from 14–20°. There are a spread of Ti–O bond distances ranging from 1.91–2.02 Å. There are seven inequivalent Mn3+ sites. In the first Mn3+ site, Mn3+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 15–22°. There are a spread of Mn–O bond distances ranging from 1.99–2.02 Å. In the second Mn3+ site, Mn3+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 20–21°. There are a spread of Mn–O bond distances ranging from 2.00–2.03 Å. In the third Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent MnO6 octahedra and corners with four TiO6 octahedra. The corner-sharing octahedra tilt angles range from 14–23°. There are a spread of Mn–O bond distances ranging from 2.03–2.10 Å. In the fourth Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 15–21°. There are a spread of Mn–O bond distances ranging from 1.99–2.07 Å. In the fifth Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 15–22°. There are a spread of Mn–O bond distances ranging from 1.99–2.05 Å. In the sixth Mn3+ site, Mn3+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 20–22°. There are a spread of Mn–O bond distances ranging from 1.98–2.02 Å. In the seventh Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–22°. There are a spread of Mn–O bond distances ranging from 1.99–2.04 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+ and two Ti4+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, and two Ti4+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn3+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, and two Ti4+ atoms. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+, one Ti4+, and one Mn3+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+, two equivalent La3+, one Ti4+, and one Mn3+ atom. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ti4+, and one Mn3+ atom. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to three La3+ and two Mn3+ atoms. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Ti4+, and one Mn3+ atom. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one La3+, one Ti4+, and one Mn3+ atom. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, two equivalent La3+, and two Mn3+ atoms. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the fourteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the fifteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the seventeenth O2- site, O2- is bonded in a 3-coordinate geometry to three La3+, one Ti4+, and one Mn3+ atom. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the nineteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Ti4+, and one Mn3+ atom. In the twenty-first O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the twenty-second O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, three La3+, and two Mn3+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, two equivalent La3+, and two Mn3+ atoms. In the twenty-sixth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ti4+, and one Mn3+ atom. In the twenty-seventh O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Ti4+, and one Mn3+ atom. In the twenty-eighth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn3+ atoms. In the twenty-ninth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, and two Ti4+ atoms. In the thirtieth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ti4+, and one Mn3+ atom.

36 MATERIALS SCIENCE↗

Materials Data on SrLa7Cu4(SnO6)4 by Materials Project

SrLa7Cu4(SnO6)4 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic Pm space group. The structure is three-dimensional. Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–3.05 Å. There are seven inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.45–2.72 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.84 Å. In the third La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.48–2.99 Å. In the fourth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.48–2.98 Å. In the fifth La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.95 Å. In the sixth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.47–2.67 Å. In the seventh La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.99 Å. There are two inequivalent Cu+2.25+ sites. In the first Cu+2.25+ site, Cu+2.25+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with two equivalent SnO6 octahedra and corners with four CuO6 octahedra. The corner-sharing octahedra tilt angles range from 18–30°. There are a spread of Cu–O bond distances ranging from 2.00–2.35 Å. In the second Cu+2.25+ site, Cu+2.25+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with two equivalent SnO6 octahedra and corners with four CuO6 octahedra. The corner-sharing octahedra tilt angles range from 9–32°. There are a spread of Cu–O bond distances ranging from 1.97–2.36 Å. There are two inequivalent Sn4+ sites. In the first Sn4+ site, Sn4+ is bonded to six O2- atoms to form SnO6 octahedra that share corners with two equivalent CuO6 octahedra and corners with four SnO6 octahedra. The corner-sharing octahedra tilt angles range from 31–41°. There are a spread of Sn–O bond distances ranging from 2.07–2.12 Å. In the second Sn4+ site, Sn4+ is bonded to six O2- atoms to form SnO6 octahedra that share corners with two equivalent CuO6 octahedra and corners with four SnO6 octahedra. The corner-sharing octahedra tilt angles range from 25–40°. There are a spread of Sn–O bond distances ranging from 2.06–2.11 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Cu+2.25+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two La3+ and two Sn4+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Cu+2.25+, and one Sn4+ atom. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Cu+2.25+, and one Sn4+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Sr2+, three La3+, and two equivalent Cu+2.25+ atoms. In the sixth O2- site, O2- is bonded to one Sr2+, one La3+, and two equivalent Sn4+ atoms to form distorted corner-sharing OSrLaSn2 tetrahedra. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to one Sr2+, two La3+, and two equivalent Cu+2.25+ atoms. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to two La3+ and two equivalent Sn4+ atoms. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Cu+2.25+ atoms. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to two La3+ and two Sn4+ atoms. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to three La3+, one Cu+2.25+, and one Sn4+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, one Cu+2.25+, and one Sn4+ atom. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to two La3+ and two equivalent Sn4+ atoms. In the fourteenth O2- site, O2- is bonded to two La3+ and two equivalent Sn4+ atoms to form corner-sharing OLa2Sn2 tetrahedra. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and two equivalent Cu+2.25+ atoms. In the sixteenth O2- site, O2- is bonded in a 4-coordinate geometry to four La3+ and two equivalent Cu+2.25+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Sr3La7Ti2Mn8O30 by Materials Project

Sr3La7Ti2Mn8O30 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.55–3.15 Å. In the second Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.55–3.15 Å. In the third Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.53–3.14 Å. There are seven inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.82 Å. In the second La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.81 Å. In the third La3+ site, La3+ is bonded in a 12-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.48–2.83 Å. In the fourth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.43–2.83 Å. In the fifth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.45–2.81 Å. In the sixth La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.81 Å. In the seventh La3+ site, La3+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.84 Å. There are two inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 15–22°. There are a spread of Ti–O bond distances ranging from 1.93–2.02 Å. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–23°. There are a spread of Ti–O bond distances ranging from 1.94–2.02 Å. There are eight inequivalent Mn+3.12+ sites. In the first Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form MnO6 octahedra that share a cornercorner with one TiO6 octahedra and corners with five MnO6 octahedra. The corner-sharing octahedra tilt angles range from 15–23°. There are a spread of Mn–O bond distances ranging from 1.98–2.06 Å. In the second Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–22°. There are a spread of Mn–O bond distances ranging from 1.99–2.03 Å. In the third Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 13–21°. There are a spread of Mn–O bond distances ranging from 2.00–2.07 Å. In the fourth Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form MnO6 octahedra that share a cornercorner with one TiO6 octahedra and corners with five MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–22°. There are a spread of Mn–O bond distances ranging from 1.96–2.05 Å. In the fifth Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form MnO6 octahedra that share a cornercorner with one TiO6 octahedra and corners with five MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–20°. There are a spread of Mn–O bond distances ranging from 1.99–2.02 Å. In the sixth Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form MnO6 octahedra that share a cornercorner with one TiO6 octahedra and corners with five MnO6 octahedra. The corner-sharing octahedra tilt angles range from 13–21°. There are a spread of Mn–O bond distances ranging from 1.97–2.03 Å. In the seventh Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent TiO6 octahedra and corners with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–22°. There are a spread of Mn–O bond distances ranging from 1.97–2.06 Å. In the eighth Mn+3.12+ site, Mn+3.12+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 15–21°. There are a spread of Mn–O bond distances ranging from 1.99–2.02 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, and two Ti4+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+, two La3+, and two Ti4+ atoms. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn+3.12+ atoms. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ti4+, and one Mn+3.12+ atom. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, three La3+, and two Mn+3.12+ atoms. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+, two equivalent La3+, one Ti4+, and one Mn+3.12+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn+3.12+ atoms. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ti4+, and one Mn+3.12+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, three La3+, and two Mn+3.12+ atoms. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+, two equivalent La3+, and two Mn+3.12+ atoms. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, and two Mn+3.12+ atoms. In the seventeenth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, three La3+, and two Mn+3.12+ atoms. In the nineteenth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn+3.12+ atoms. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+, two La3+, one Ti4+, and one Mn+3.12+ atom. In the twenty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, three La3+, and two Mn+3.12+ atoms. In the twenty-second O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn+3.12+ atoms. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to two Sr2+, one La3+, one Ti4+, and one Mn+3.12+ atom. In the twenty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to three La3+ and two Mn+3.12+ atoms. In the twenty-sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Sr2+, two equivalent La3+, one Ti4+, and one Mn+3.12+ atom. In the twenty-seventh O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one La3+, one Ti4+, and one Mn+3.12+ atom. In the twenty-eighth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+, two La3+, one Ti4+, and one Mn+3.12+ atom. In the thirtieth O2- site, O2- is bonded in a 5-coordinate geometry to one Sr2+, two La3+, and two Mn+3.12+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on BaLa7Mg5Nb3O24 by Materials Project

BaMg5La7Nb3O24 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. Ba2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Ba–O bond distances ranging from 2.54–3.22 Å. There are five inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent MgO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 18–31°. There are a spread of Mg–O bond distances ranging from 2.06–2.12 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra and corners with five NbO6 octahedra. The corner-sharing octahedra tilt angles range from 24–33°. There are a spread of Mg–O bond distances ranging from 2.06–2.16 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 20–28°. There are a spread of Mg–O bond distances ranging from 2.06–2.11 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra and corners with five NbO6 octahedra. The corner-sharing octahedra tilt angles range from 4–31°. There are a spread of Mg–O bond distances ranging from 2.06–2.20 Å. In the fifth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent MgO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 19–28°. There are a spread of Mg–O bond distances ranging from 2.05–2.17 Å. There are seven inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.98 Å. In the second La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.90 Å. In the third La3+ site, La3+ is bonded in a 2-coordinate geometry to six O2- atoms. There are a spread of La–O bond distances ranging from 2.31–2.87 Å. In the fourth La3+ site, La3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of La–O bond distances ranging from 2.36–2.84 Å. In the fifth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.95 Å. In the sixth La3+ site, La3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of La–O bond distances ranging from 2.35–3.13 Å. In the seventh La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.93 Å. There are three inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six MgO6 octahedra. The corner-sharing octahedra tilt angles range from 19–30°. There are a spread of Nb–O bond distances ranging from 1.95–2.09 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six MgO6 octahedra. The corner-sharing octahedra tilt angles range from 4–31°. There are a spread of Nb–O bond distances ranging from 1.99–2.04 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six MgO6 octahedra. The corner-sharing octahedra tilt angles range from 16–33°. There are a spread of Nb–O bond distances ranging from 2.00–2.05 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Mg2+, three La3+, and one Nb5+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Ba2+, one Mg2+, one La3+, and one Nb5+ atom. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two La3+, and one Nb5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to one Ba2+, one Mg2+, one La3+, and one Nb5+ atom. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two La3+, and one Nb5+ atom. In the tenth O2- site, O2- is bonded in a 5-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the eleventh O2- site, O2- is bonded in a distorted linear geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two La3+, and one Nb5+ atom. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to two Mg2+ and three La3+ atoms. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, one Mg2+, one La3+, and one Nb5+ atom. In the fifteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Mg2+ and three La3+ atoms. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Mg2+ and three La3+ atoms. In the seventeenth O2- site, O2- is bonded in a 4-coordinate geometry to two Mg2+ and three La3+ atoms. In the eighteenth O2- site, O2- is bonded in a 4-coordinate geometry to two Mg2+ and three La3+ atoms. In the nineteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to two Mg2+ and three La3+ atoms. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two La3+, and one Nb5+ atom. In the twenty-second O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, one Mg2+, two La3+, and one Nb5+ atom. In the twenty-third O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two La3+, and one Nb5+ atom. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two La3+, and one Nb5+ atom.

36 MATERIALS SCIENCE↗