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At least 847 records · Page 47
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Bi3SbPt2 by Materials Project

Pt2Bi3Sb crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are two inequivalent Pt2- sites. In the first Pt2- site, Pt2- is bonded to five Bi+2.33+ and one Sb3- atom to form PtBi5Sb octahedra that share corners with twelve PtBi5Sb octahedra, a cornercorner with one BiSbPt3 tetrahedra, and a cornercorner with one SbBiPt3 trigonal pyramid. The corner-sharing octahedra tilt angles range from 61–64°. There are a spread of Pt–Bi bond distances ranging from 2.80–2.86 Å. The Pt–Sb bond length is 2.72 Å. In the second Pt2- site, Pt2- is bonded to four Bi+2.33+ and two equivalent Sb3- atoms to form PtBi4Sb2 octahedra that share corners with twelve PtBi5Sb octahedra, corners with two equivalent BiSbPt3 tetrahedra, and corners with two equivalent SbBiPt3 trigonal pyramids. The corner-sharing octahedra tilt angles range from 61–64°. There are a spread of Pt–Bi bond distances ranging from 2.80–2.87 Å. There are one shorter (2.72 Å) and one longer (2.74 Å) Pt–Sb bond lengths. There are three inequivalent Bi+2.33+ sites. In the first Bi+2.33+ site, Bi+2.33+ is bonded in a trigonal planar geometry to three Pt2- atoms. In the second Bi+2.33+ site, Bi+2.33+ is bonded to three Pt2- and one Sb3- atom to form distorted BiSbPt3 tetrahedra that share corners with three PtBi5Sb octahedra, corners with two equivalent BiSbPt3 tetrahedra, and corners with five equivalent SbBiPt3 trigonal pyramids. The corner-sharing octahedra tilt angles range from 80–82°. The Bi–Sb bond length is 2.97 Å. In the third Bi+2.33+ site, Bi+2.33+ is bonded in a trigonal planar geometry to three Pt2- atoms. Sb3- is bonded to three Pt2- and one Bi+2.33+ atom to form distorted SbBiPt3 trigonal pyramids that share corners with three PtBi5Sb octahedra, corners with five equivalent BiSbPt3 tetrahedra, and corners with two equivalent SbBiPt3 trigonal pyramids. The corner-sharing octahedra tilt angles range from 78–81°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La8(BiSb)3 by Materials Project

La8(BiSb)3 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are four inequivalent La sites. In the first La site, La is bonded in a 6-coordinate geometry to three Bi and three Sb atoms. There are a spread of La–Bi bond distances ranging from 3.29–3.54 Å. There are a spread of La–Sb bond distances ranging from 3.23–3.49 Å. In the second La site, La is bonded in a 6-coordinate geometry to three Bi and three Sb atoms. There are a spread of La–Bi bond distances ranging from 3.28–3.53 Å. There are a spread of La–Sb bond distances ranging from 3.22–3.53 Å. In the third La site, La is bonded in a 6-coordinate geometry to three Bi and three Sb atoms. There are a spread of La–Bi bond distances ranging from 3.28–3.51 Å. There are a spread of La–Sb bond distances ranging from 3.24–3.51 Å. In the fourth La site, La is bonded in a 6-coordinate geometry to three Bi and three Sb atoms. There are a spread of La–Bi bond distances ranging from 3.29–3.55 Å. There are a spread of La–Sb bond distances ranging from 3.22–3.49 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded to eight La atoms to form distorted BiLa8 hexagonal bipyramids that share corners with two equivalent BiLa8 hexagonal bipyramids, corners with six SbLa8 hexagonal bipyramids, edges with four equivalent BiLa8 hexagonal bipyramids, faces with two equivalent BiLa8 hexagonal bipyramids, and faces with six SbLa8 hexagonal bipyramids. In the second Bi site, Bi is bonded to eight La atoms to form distorted BiLa8 hexagonal bipyramids that share corners with four equivalent BiLa8 hexagonal bipyramids, corners with four equivalent SbLa8 hexagonal bipyramids, edges with four equivalent SbLa8 hexagonal bipyramids, faces with four equivalent BiLa8 hexagonal bipyramids, and faces with four equivalent SbLa8 hexagonal bipyramids. There are two inequivalent Sb sites. In the first Sb site, Sb is bonded to eight La atoms to form distorted SbLa8 hexagonal bipyramids that share corners with four equivalent BiLa8 hexagonal bipyramids, corners with four equivalent SbLa8 hexagonal bipyramids, edges with four equivalent BiLa8 hexagonal bipyramids, faces with four equivalent BiLa8 hexagonal bipyramids, and faces with four equivalent SbLa8 hexagonal bipyramids. In the second Sb site, Sb is bonded to eight La atoms to form distorted SbLa8 hexagonal bipyramids that share corners with two equivalent SbLa8 hexagonal bipyramids, corners with six BiLa8 hexagonal bipyramids, edges with four equivalent SbLa8 hexagonal bipyramids, faces with two equivalent SbLa8 hexagonal bipyramids, and faces with six BiLa8 hexagonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi4Ir by Materials Project

IrBi4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Ir sites. In the first Ir site, Ir is bonded in a 8-coordinate geometry to eight Bi atoms. There are a spread of Ir–Bi bond distances ranging from 2.85–2.89 Å. In the second Ir site, Ir is bonded in a body-centered cubic geometry to eight Bi atoms. There are four shorter (2.88 Å) and four longer (2.90 Å) Ir–Bi bond lengths. There are four inequivalent Bi sites. In the first Bi site, Bi is bonded in a distorted water-like geometry to two Ir atoms. In the second Bi site, Bi is bonded in a distorted water-like geometry to two Ir atoms. In the third Bi site, Bi is bonded in a distorted water-like geometry to two equivalent Ir atoms. In the fourth Bi site, Bi is bonded in a distorted water-like geometry to two equivalent Ir atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

Abstract In this study, three different types of biochar (biomass materials were beech wood, corncob, and bamboo) were loaded with bismuth to form bismuth impregnated biochars (named respectively as Bi@WBC, Bi@CBC, and Bi@BBC) to investigate their properties (pore structure and surface chemistry characteristics) on methylene blue (MB) removal capacities. Three bismuth impregnated biochars made from different biomass materials were ranked for their adsorption capacity of MB as follows: Bi@WBC > Bi@CBC > Bi@BBC, in which Bi@WBC showed the largest Langmuir adsorption capacity of 178.59 mg g −1 . While the specific surface area (SSA) and pore volume of Bi@WBC were the largest (accounting for 477.74 m 2 g −1 and 0.15 cm 3 g −1 , respectively), according to the FTIR and XPS results, Bi@WBC (72.3%) exhibited a higher proportion of BiO bonds than the Bi@CBC (52.3%) and Bi@BBC (48.4%) did. Conclusively, the rich porous structure and surface functional groups of Bi@WBC affected the adsorption capacity of MB, and the chemical adsorption provided the main contribution. © 2022 Society of Chemical Industry (SCI).

Li, Peiyi↗
DOE OSTI2023

Bismuth-Polyoxocation Coordination Networks: Controlling Nuclearity and Dimension-Dependent Photocatalysis

Bismuth-oxocluster nodes for metal–organic frameworks (MOFs) and coordination networks/polymers are less prolific than other families featuring zinc, zirconium, titanium, lanthanides, etc. However, Bi 3+ is non-toxic, it readily forms polyoxocations, and its oxides are exploited in photocatalysis. This family of compounds provides opportunity in medicinal and energy applications. Here, we show that Bi node nuclearity depends on solvent polarity, leading to a family of Bi x -sulfonate/carboxylate coordination networks with x = 1–38. Larger nuclearity-node networks were obtained from polar and strongly coordinating solvents, and we attribute the solvent’s ability to stabilize larger species in solution. Here, the strong role of the solvent and the lesser role of the linker in defining node topologies differ from other MOF syntheses, and this is due to the Bi 3+ intrinsic lone pair that leads to weak node–linker interactions. We describe this family by single-crystal X-ray diffraction (eleven structures), obtained in pure forms and high yields. Ditopic linkers include NDS (1,5-naphthalenedisulfonate), DDBS (2,2'-[biphenyl-4,4'-diylchethane-2,1-diyl] dibenzenesulphonate), and NH 2 -benzendicarboxylate (BDC). While the BDC and NDS linkers yield more open-framework topologies that resemble those obtained by carboxylate linkers, topologies with DDBS linkers appear to be in part driven by association between DDBS molecules. An in situ small-angle X-ray scattering study of Bi 38 -DDBS reveals stepwise formation, including Bi 38 -assembly, pre-organization in solution, followed by crystallization, confirming the less important role of the linker. We demonstrate photocatalytic hydrogen (H 2 ) generation with select members of the synthesized materials without the benefit of a co-catalyst. Band gap determination from X-ray photoelectron spectroscopy (XPS) and UV–vis data suggest the DDBS linker effectively absorbs in the visible range with ligand-to-Bi-node charge transfer. In addition, materials containing more Bi (larger Bi 38 -nodes or Bi 6 inorganic chains) exhibit strong UV absorption, also contributing to effective photocatalysis by a different mechanism. All tested materials became black with extensive UV–vis exposure, and XPS, transmission electron microscopy, and X-ray scattering of the black Bi 38 -framework suggest that Bi o is formed in situ, without phase segregation. This evolution leads to enhanced photocatalytic performance, perhaps due to increased light absorption.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Materials Data on KBa4Bi3O by Materials Project

KBa4Bi3O crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. K is bonded in a square co-planar geometry to four equivalent Bi atoms. All K–Bi bond lengths are 3.64 Å. Ba is bonded in a single-bond geometry to five Bi and one O atom. There are a spread of Ba–Bi bond distances ranging from 3.66–3.92 Å. The Ba–O bond length is 2.57 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 9-coordinate geometry to two equivalent K, six equivalent Ba, and one Bi atom. The Bi–Bi bond length is 3.11 Å. In the second Bi site, Bi is bonded in a 10-coordinate geometry to eight equivalent Ba atoms. O is bonded in a tetrahedral geometry to four equivalent Ba atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi4RuI2 by Materials Project

RuBi4I2 crystallizes in the tetragonal I4/m space group. The structure is one-dimensional and consists of two RuBi4I2 ribbons oriented in the (0, 0, 1) direction. Ru is bonded in a 8-coordinate geometry to one Ru and eight Bi atoms. The Ru–Ru bond length is 2.88 Å. There are four shorter (2.80 Å) and four longer (2.94 Å) Ru–Bi bond lengths. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 2-coordinate geometry to two equivalent Ru and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.04 Å. In the second Bi site, Bi is bonded in a 4-coordinate geometry to two equivalent Ru and two equivalent I atoms. There are one shorter (3.22 Å) and one longer (3.24 Å) Bi–I bond lengths. I is bonded in a 2-coordinate geometry to two equivalent Bi atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaLa(BiS3)2 by Materials Project

BaLa(BiS3)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Ba–S bond distances ranging from 3.17–3.63 Å. La3+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of La–S bond distances ranging from 2.93–3.23 Å. There are two inequivalent Bi+3.50+ sites. In the first Bi+3.50+ site, Bi+3.50+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing BiS6 octahedra. The corner-sharing octahedral tilt angles are 8°. There are a spread of Bi–S bond distances ranging from 2.64–3.14 Å. In the second Bi+3.50+ site, Bi+3.50+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing BiS6 octahedra. The corner-sharing octahedral tilt angles are 8°. There are a spread of Bi–S bond distances ranging from 2.61–3.31 Å. There are six inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent Ba2+, one La3+, and two equivalent Bi+3.50+ atoms. In the second S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent Ba2+, two equivalent La3+, and one Bi+3.50+ atom. In the third S2- site, S2- is bonded to one Ba2+ and five Bi+3.50+ atoms to form distorted SBaBi5 octahedra that share corners with three equivalent SBaLaBi3 trigonal bipyramids, edges with four equivalent SBaBi5 octahedra, edges with two equivalent SBa2La2Bi square pyramids, and edges with three equivalent SBaLaBi3 trigonal bipyramids. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to one Ba2+, three equivalent La3+, and one S2- atom. The S–S bond length is 2.12 Å. In the fifth S2- site, S2- is bonded to two equivalent Ba2+, two equivalent La3+, and one Bi+3.50+ atom to form distorted SBa2La2Bi square pyramids that share a cornercorner with one SBaLaBi3 trigonal bipyramid, edges with two equivalent SBaBi5 octahedra, edges with two equivalent SBa2La2Bi square pyramids, and edges with two equivalent SBaLaBi3 trigonal bipyramids. In the sixth S2- site, S2- is bonded to one Ba2+, one La3+, and three Bi+3.50+ atoms to form distorted SBaLaBi3 trigonal bipyramids that share corners with three equivalent SBaBi5 octahedra, a cornercorner with one SBa2La2Bi square pyramid, corners with two equivalent SBaLaBi3 trigonal bipyramids, edges with three equivalent SBaBi5 octahedra, and edges with two equivalent SBa2La2Bi square pyramids. The corner-sharing octahedra tilt angles range from 1–56°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La3MgBi5 by Materials Project

La3MgBi5 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. Mg is bonded to six equivalent Bi atoms to form face-sharing MgBi6 octahedra. All Mg–Bi bond lengths are 3.10 Å. La is bonded in a 9-coordinate geometry to nine Bi atoms. There are a spread of La–Bi bond distances ranging from 3.34–3.50 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded to two equivalent Mg and five equivalent La atoms to form a mixture of distorted corner, edge, and face-sharing BiLa5Mg2 pentagonal bipyramids. In the second Bi site, Bi is bonded in a 8-coordinate geometry to six equivalent La and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.31 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La3ScBi5 by Materials Project

La3ScBi5 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. La is bonded in a 9-coordinate geometry to nine Bi atoms. There are a spread of La–Bi bond distances ranging from 3.33–3.53 Å. Sc is bonded to six equivalent Bi atoms to form face-sharing ScBi6 octahedra. All Sc–Bi bond lengths are 3.05 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded to five equivalent La and two equivalent Sc atoms to form a mixture of distorted edge, corner, and face-sharing BiLa5Sc2 pentagonal bipyramids. In the second Bi site, Bi is bonded in a 8-coordinate geometry to six equivalent La and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.31 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce3MnBi5 by Materials Project

Ce3MnBi5 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. Ce is bonded in a 9-coordinate geometry to nine Bi atoms. There are a spread of Ce–Bi bond distances ranging from 3.15–3.51 Å. Mn is bonded to six equivalent Bi atoms to form face-sharing MnBi6 octahedra. All Mn–Bi bond lengths are 2.82 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded to five equivalent Ce and two equivalent Mn atoms to form a mixture of distorted corner, edge, and face-sharing BiCe5Mn2 pentagonal bipyramids. In the second Bi site, Bi is bonded in a 6-coordinate geometry to six equivalent Ce and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.22 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Al3Bi5Cl12 by Materials Project

(Bi)5(AlCl4)3 is Iron carbide-derived structured and crystallizes in the trigonal R-3c space group. The structure is zero-dimensional and consists of eighteen AlCl4 clusters and six Bi clusters. In each AlCl4 cluster, Al is bonded in a tetrahedral geometry to four Cl atoms. There are two shorter (2.15 Å) and two longer (2.18 Å) Al–Cl bond lengths. There are two inequivalent Cl sites. In the first Cl site, Cl is bonded in a single-bond geometry to one Al atom. In the second Cl site, Cl is bonded in a single-bond geometry to one Al atom. In each Bi cluster, there are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 2-coordinate geometry to two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.06 Å. In the second Bi site, Bi is bonded in a 6-coordinate geometry to three equivalent Bi atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mn3Bi by Materials Project

Mn3Bi crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Mn sites. In the first Mn site, Mn is bonded in a 2-coordinate geometry to four equivalent Mn and two equivalent Bi atoms. There are two shorter (2.81 Å) and two longer (2.95 Å) Mn–Mn bond lengths. Both Mn–Bi bond lengths are 2.90 Å. In the second Mn site, Mn is bonded in a 1-coordinate geometry to eight Mn and three Bi atoms. There are two shorter (2.68 Å) and two longer (3.10 Å) Mn–Mn bond lengths. There are a spread of Mn–Bi bond distances ranging from 2.79–3.15 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 6-coordinate geometry to six Mn atoms. In the second Bi site, Bi is bonded in a 12-coordinate geometry to twelve equivalent Mn and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.10 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cd2Bi6O11 by Materials Project

Cd2Bi6O11 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Cd–O bond distances ranging from 2.15–2.95 Å. In the second Cd2+ site, Cd2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Cd–O bond distances ranging from 2.20–2.90 Å. In the third Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.24–2.75 Å. In the fourth Cd2+ site, Cd2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Cd–O bond distances ranging from 2.22–2.83 Å. There are twelve inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.16–2.94 Å. In the second Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.17–2.71 Å. In the third Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.13–2.92 Å. In the fourth Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Bi–O bond distances ranging from 2.14–2.47 Å. In the fifth Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Bi–O bond distances ranging from 2.14–2.88 Å. In the sixth Bi3+ site, Bi3+ is bonded in a distorted pentagonal planar geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.12–2.70 Å. In the seventh Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.19–2.84 Å. In the eighth Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.15–2.63 Å. In the ninth Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.15–3.08 Å. In the tenth Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.21–3.00 Å. In the eleventh Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.19–2.93 Å. In the twelfth Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.25–2.83 Å. There are twenty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Cd2+ and three Bi3+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Cd2+ and two Bi3+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three Bi3+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to four Bi3+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the seventh O2- site, O2- is bonded to two Cd2+ and two Bi3+ atoms to form corner-sharing OCd2Bi2 tetrahedra. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cd2+ and two Bi3+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to two Cd2+ and two Bi3+ atoms. In the tenth O2- site, O2- is bonded in a distorted tetrahedral geometry to four Bi3+ atoms. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Cd2+ and four Bi3+ atoms. In the thirteenth O2- site, O2- is bonded in a trigonal non-coplanar geometry to one Cd2+ and two Bi3+ atoms. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Cd2+ and two Bi3+ atoms. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Cd2+ and four Bi3+ atoms. In the sixteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Cd2+ and three Bi3+ atoms. In the seventeenth O2- site, O2- is bonded in a 4-coordinate geometry to one Cd2+ and three Bi3+ atoms. In the eighteenth O2- site, O2- is bonded to one Cd2+ and three Bi3+ atoms to form distorted corner-sharing OCdBi3 tetrahedra. In the nineteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Cd2+ and one Bi3+ atom. In the twentieth O2- site, O2- is bonded in a 4-coordinate geometry to one Cd2+ and three Bi3+ atoms. In the twenty-first O2- site, O2- is bonded in a 2-coordinate geometry to two Cd2+ and two Bi3+ atoms. In the twenty-second O2- site, O2- is bonded in a 4-coordinate geometry to two Cd2+ and two Bi3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba6Bi6O17 by Materials Project

Ba6Bi6O17 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with two equivalent BaO12 cuboctahedra, faces with four equivalent BaO12 cuboctahedra, faces with four equivalent BiO6 octahedra, and faces with four equivalent BiO5 square pyramids. There are a spread of Ba–O bond distances ranging from 3.15–3.19 Å. In the second Ba2+ site, Ba2+ is bonded in a distorted q6 geometry to eleven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.95–3.21 Å. In the third Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share corners with seven equivalent BaO12 cuboctahedra, faces with two equivalent BaO12 cuboctahedra, faces with six equivalent BiO6 octahedra, and faces with two equivalent BiO5 square pyramids. There are a spread of Ba–O bond distances ranging from 3.11–3.20 Å. In the fourth Ba2+ site, Ba2+ is bonded in a distorted q6 geometry to ten O2- atoms. There are eight shorter (3.07 Å) and two longer (3.19 Å) Ba–O bond lengths. There are two inequivalent Bi+3.67+ sites. In the first Bi+3.67+ site, Bi+3.67+ is bonded to five O2- atoms to form BiO5 square pyramids that share corners with four equivalent BiO6 octahedra, a cornercorner with one BiO5 square pyramid, and faces with four BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 2°. There are one shorter (2.19 Å) and four longer (2.25 Å) Bi–O bond lengths. In the second Bi+3.67+ site, Bi+3.67+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with four equivalent BiO6 octahedra, corners with two equivalent BiO5 square pyramids, and faces with four BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Bi–O bond distances ranging from 2.16–2.25 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to four Ba2+ and two Bi+3.67+ atoms to form a mixture of distorted corner, edge, and face-sharing OBa4Bi2 octahedra. The corner-sharing octahedra tilt angles range from 0–68°. In the second O2- site, O2- is bonded to four Ba2+ and two equivalent Bi+3.67+ atoms to form a mixture of distorted corner and face-sharing OBa4Bi2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the third O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two equivalent Bi+3.67+ atoms. In the fourth O2- site, O2- is bonded in a distorted linear geometry to four Ba2+ and two equivalent Bi+3.67+ atoms. In the fifth O2- site, O2- is bonded to four Ba2+ and two equivalent Bi+3.67+ atoms to form a mixture of distorted corner, edge, and face-sharing OBa4Bi2 octahedra. The corner-sharing octahedra tilt angles range from 1–62°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi5O7F by Materials Project

Bi5O7F crystallizes in the triclinic P1 space group. The structure is one-dimensional and consists of one Bi5O7F ribbon oriented in the (1, 0, 0) direction. there are ten inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded to four O2- atoms to form distorted corner-sharing BiO4 trigonal pyramids. There are a spread of Bi–O bond distances ranging from 2.14–2.25 Å. In the second Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.13–2.77 Å. In the third Bi3+ site, Bi3+ is bonded to four O2- atoms to form distorted corner-sharing BiO4 trigonal pyramids. There are a spread of Bi–O bond distances ranging from 2.12–2.26 Å. In the fourth Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to four O2- and two equivalent F1- atoms. There are a spread of Bi–O bond distances ranging from 2.14–2.40 Å. There are one shorter (2.69 Å) and one longer (2.74 Å) Bi–F bond lengths. In the fifth Bi3+ site, Bi3+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Bi–O bond distances ranging from 2.33–2.89 Å. In the sixth Bi3+ site, Bi3+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Bi–O bond distances ranging from 2.33–2.86 Å. In the seventh Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to four O2- and two equivalent F1- atoms. There are a spread of Bi–O bond distances ranging from 2.14–2.40 Å. There are one shorter (2.66 Å) and one longer (2.77 Å) Bi–F bond lengths. In the eighth Bi3+ site, Bi3+ is bonded to four O2- atoms to form distorted corner-sharing BiO4 trigonal pyramids. There are a spread of Bi–O bond distances ranging from 2.12–2.26 Å. In the ninth Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.13–2.76 Å. In the tenth Bi3+ site, Bi3+ is bonded to four O2- atoms to form distorted corner-sharing BiO4 trigonal pyramids. There are a spread of Bi–O bond distances ranging from 2.14–2.25 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three Bi3+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to four Bi3+ atoms. In the fourth O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Bi3+ atoms. In the sixth O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ and one F1- atom. The O–F bond length is 2.59 Å. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ and one F1- atom. The O–F bond length is 2.60 Å. In the ninth O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the tenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Bi3+ atoms. In the eleventh O2- site, O2- is bonded to four Bi3+ atoms to form a mixture of distorted edge and corner-sharing OBi4 tetrahedra. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to four Bi3+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Bi3+ atoms. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to four Bi3+ atoms. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to two equivalent Bi3+ and one O2- atom. In the second F1- site, F1- is bonded in a 3-coordinate geometry to two equivalent Bi3+ and one O2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca(BiO2)2 by Materials Project

CaBi2O4 is Spinel-like structured and crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are eight inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded to four O2- atoms to form CaO4 tetrahedra that share corners with three CaO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are two shorter (2.31 Å) and two longer (2.32 Å) Ca–O bond lengths. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with three CaO4 tetrahedra, corners with three BiO4 tetrahedra, and edges with six BiO6 octahedra. There are two shorter (2.39 Å) and four longer (2.40 Å) Ca–O bond lengths. In the third Ca2+ site, Ca2+ is bonded to four O2- atoms to form CaO4 tetrahedra that share corners with three CaO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 55–59°. All Ca–O bond lengths are 2.31 Å. In the fourth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with two equivalent CaO4 tetrahedra, corners with four BiO4 tetrahedra, an edgeedge with one CaO6 octahedra, and edges with five BiO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.39–2.41 Å. In the fifth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six BiO4 tetrahedra, edges with two CaO6 octahedra, and edges with four equivalent BiO6 octahedra. There are five shorter (2.40 Å) and one longer (2.41 Å) Ca–O bond lengths. In the sixth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six BiO4 tetrahedra, edges with two CaO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.39–2.41 Å. In the seventh Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share a cornercorner with one CaO4 tetrahedra, corners with five BiO4 tetrahedra, an edgeedge with one CaO6 octahedra, and edges with five BiO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.39–2.41 Å. In the eighth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six BiO4 tetrahedra, edges with two CaO6 octahedra, and edges with four BiO6 octahedra. There are three shorter (2.38 Å) and three longer (2.41 Å) Ca–O bond lengths. There are twelve inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three CaO4 tetrahedra, corners with three BiO4 tetrahedra, edges with two equivalent CaO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.36–2.46 Å. In the second Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three equivalent CaO4 tetrahedra, corners with three equivalent BiO4 tetrahedra, edges with two CaO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.33–2.50 Å. In the third Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six CaO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 56–59°. There are three shorter (2.28 Å) and one longer (2.30 Å) Bi–O bond lengths. In the fourth Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with two equivalent CaO4 tetrahedra, corners with four BiO4 tetrahedra, edges with three CaO6 octahedra, and edges with three BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.38–2.43 Å. In the fifth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with three CaO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 55–60°. There are three shorter (2.25 Å) and one longer (2.31 Å) Bi–O bond lengths. In the sixth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six CaO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are three shorter (2.28 Å) and one longer (2.32 Å) Bi–O bond lengths. In the seventh Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six BiO4 tetrahedra, edges with two equivalent BiO6 octahedra, and edges with four CaO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.39–2.43 Å. In the eighth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six CaO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 55–58°. There are a spread of Bi–O bond distances ranging from 2.27–2.30 Å. In the ninth Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share a cornercorner with one CaO4 tetrahedra, corners with five BiO4 tetrahedra, edges with three CaO6 octahedra, and edges with three BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.36–2.46 Å. In the tenth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six CaO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 55–59°. There are a spread of Bi–O bond distances ranging from 2.27–2.30 Å. In the eleventh Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three equivalent CaO4 tetrahedra, corners with three equivalent BiO4 tetrahedra, edges with two CaO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.35–2.47 Å. In the twelfth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with three CaO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 55–60°. There are one shorter (2.26 Å) and three longer (2.27 Å) Bi–O bond lengths. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded to two Ca2+ and two Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCa2Bi2 trigonal pyramids. In the second O2- site, O2- is bonded to two Ca2+ and two equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCa2Bi2 trigonal pyramids. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Bi3+ atoms. In the fifth O2- site, O2- is bonded to two Ca2+ and two Bi3+ atoms to form distorted OCa2Bi2 trigonal pyramids that share corners with seven OCaBi3 trigonal pyramids and an edgeedge with one OCa2Bi2 trigonal pyramid. In the sixth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the seventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the eighth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the ninth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the tenth O2- site, O2- is bonded to two Ca2+ and two Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCa2Bi2 trigonal pyramids. In the eleventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the twelfth O2- site, O2- is bonded to two Ca2+ and two Bi3+ atoms to form distorted OCa2Bi2 trigonal pyramids that share corners with six OCa2Bi2 trigonal pyramids and edges with two OCaBi3 trigonal pyramids. In the thirteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the fourteenth O2- site, O2- is bonded to one Ca2+ and three Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCaBi3 trigonal pyramids. In the fifteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the sixteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the seventeenth O2- site, O2- is bonded to two Ca2+ and two Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCa2Bi2 trigonal pyramids. In the eighteenth O2- site, O2- is bonded to two Ca2+ and two Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCa2Bi2 trigonal pyramids. In the nineteenth O2- site, O2- is bonded to two Ca2+ and two equivalent Bi3+ atoms to form a mixture of distorted edge and corner-sharing OCa2Bi2 trigonal pyramids. In the twentieth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the twenty-second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Bi3+ atoms. In the twenty-third O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms. In the twenty-fourth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Ca2+ and three Bi3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(BiO2)2 by Materials Project

Bi2MgO4 is Spinel-like structured and crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are eight inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with three MgO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 52–57°. There are two shorter (2.08 Å) and two longer (2.13 Å) Mg–O bond lengths. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three MgO4 tetrahedra, corners with three BiO4 trigonal pyramids, and edges with six BiO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.10–2.40 Å. In the third Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with three MgO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 50–58°. There are a spread of Mg–O bond distances ranging from 2.03–2.11 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent MgO4 tetrahedra, corners with three BiO4 tetrahedra, a cornercorner with one BiO4 trigonal pyramid, an edgeedge with one MgO6 octahedra, and edges with five BiO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.08–2.44 Å. In the fifth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six BiO4 tetrahedra, edges with two MgO6 octahedra, and edges with four equivalent BiO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.17–2.26 Å. In the sixth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six BiO4 tetrahedra, edges with two MgO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.11–2.21 Å. In the seventh Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one MgO4 tetrahedra, corners with three BiO4 tetrahedra, corners with two equivalent BiO4 trigonal pyramids, an edgeedge with one MgO6 octahedra, and edges with five BiO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.12–2.54 Å. In the eighth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six BiO4 tetrahedra, edges with two MgO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.16–2.18 Å. There are twelve inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three MgO4 tetrahedra, corners with three BiO4 trigonal pyramids, edges with two equivalent MgO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.39–2.43 Å. In the second Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three equivalent MgO4 tetrahedra, corners with three equivalent BiO4 trigonal pyramids, edges with two MgO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.36–2.47 Å. In the third Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six MgO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 50–66°. There are a spread of Bi–O bond distances ranging from 2.21–2.34 Å. In the fourth Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with two equivalent MgO4 tetrahedra, corners with three BiO4 tetrahedra, a cornercorner with one BiO4 trigonal pyramid, edges with three MgO6 octahedra, and edges with three BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.31–2.50 Å. In the fifth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 trigonal pyramids that share corners with three MgO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 41–68°. There are a spread of Bi–O bond distances ranging from 2.18–2.32 Å. In the sixth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six MgO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 50–67°. There are a spread of Bi–O bond distances ranging from 2.21–2.36 Å. In the seventh Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six BiO4 tetrahedra, edges with two equivalent BiO6 octahedra, and edges with four MgO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.36–2.41 Å. In the eighth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six MgO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 48–67°. There are a spread of Bi–O bond distances ranging from 2.22–2.33 Å. In the ninth Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share a cornercorner with one MgO4 tetrahedra, corners with three BiO4 tetrahedra, corners with two equivalent BiO4 trigonal pyramids, edges with three MgO6 octahedra, and edges with three BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.29–2.51 Å. In the tenth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 tetrahedra that share corners with six MgO6 octahedra and corners with six BiO6 octahedra. The corner-sharing octahedra tilt angles range from 49–66°. There are a spread of Bi–O bond distances ranging from 2.21–2.34 Å. In the eleventh Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three equivalent MgO4 tetrahedra, corners with three equivalent BiO4 trigonal pyramids, edges with two MgO6 octahedra, and edges with four BiO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.36–2.57 Å. In the twelfth Bi3+ site, Bi3+ is bonded to four O2- atoms to form BiO4 trigonal pyramids that share corners with three MgO6 octahedra and corners with nine BiO6 octahedra. The corner-sharing octahedra tilt angles range from 38–70°. There are a spread of Bi–O bond distances ranging from 2.15–2.31 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Mg2+ and two Bi3+ atoms. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Mg2+ and two equivalent Bi3+ atoms. In the third O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Bi3+ atoms. In the fifth O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Mg2+ and two Bi3+ atoms. In the sixth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the seventh O2- site, O2- is bonded in a distorted tetrahedral geometry to one Mg2+ and three Bi3+ atoms. In the eighth O2- site, O2- is bonded in a distorted tetrahedral geometry to one Mg2+ and three Bi3+ atoms. In the ninth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the tenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Mg2+ and two Bi3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the twelfth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Mg2+ and two Bi3+ atoms. In the thirteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the fifteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the sixteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Mg2+ and two Bi3+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Mg2+ and two Bi3+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Mg2+ and two equivalent Bi3+ atoms. In the twentieth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the twenty-second O2- site, O2- is bonded in a rectangular see-saw-like geometry to four Bi3+ atoms. In the twenty-third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms. In the twenty-fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Bi3+ atoms.

36 MATERIALS SCIENCE↗