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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on InSnBr3 by Materials Project

InSnBr3 crystallizes in the orthorhombic Fmm2 space group. The structure is three-dimensional. there are three inequivalent In1+ sites. In the first In1+ site, In1+ is bonded in a 8-coordinate geometry to six Br1- atoms. There are a spread of In–Br bond distances ranging from 3.42–3.50 Å. In the second In1+ site, In1+ is bonded in a 2-coordinate geometry to eight Br1- atoms. There are a spread of In–Br bond distances ranging from 3.01–3.52 Å. In the third In1+ site, In1+ is bonded in a 2-coordinate geometry to three Br1- atoms. There are a spread of In–Br bond distances ranging from 3.09–3.43 Å. There are five inequivalent Sn2+ sites. In the first Sn2+ site, Sn2+ is bonded in a 7-coordinate geometry to seven Br1- atoms. There are a spread of Sn–Br bond distances ranging from 2.92–3.29 Å. In the second Sn2+ site, Sn2+ is bonded in a 7-coordinate geometry to seven Br1- atoms. There are a spread of Sn–Br bond distances ranging from 2.98–3.25 Å. In the third Sn2+ site, Sn2+ is bonded in a distorted square pyramidal geometry to five Br1- atoms. There are a spread of Sn–Br bond distances ranging from 2.77–3.17 Å. In the fourth Sn2+ site, Sn2+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are a spread of Sn–Br bond distances ranging from 3.19–3.25 Å. In the fifth Sn2+ site, Sn2+ is bonded in a 4-coordinate geometry to four Br1- atoms. There are two shorter (2.81 Å) and two longer (3.20 Å) Sn–Br bond lengths. There are nine inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted bent 150 degrees geometry to one In1+ and one Sn2+ atom. In the second Br1- site, Br1- is bonded to two equivalent In1+ and two Sn2+ atoms to form distorted edge-sharing BrIn2Sn2 tetrahedra. In the third Br1- site, Br1- is bonded in a 3-coordinate geometry to three Sn2+ atoms. In the fourth Br1- site, Br1- is bonded in a T-shaped geometry to two equivalent In1+ and one Sn2+ atom. In the fifth Br1- site, Br1- is bonded in a T-shaped geometry to two equivalent In1+ and one Sn2+ atom. In the sixth Br1- site, Br1- is bonded in a 4-coordinate geometry to two In1+ and two Sn2+ atoms. In the seventh Br1- site, Br1- is bonded in a 3-coordinate geometry to one In1+ and three Sn2+ atoms. In the eighth Br1- site, Br1- is bonded in a 4-coordinate geometry to two In1+ and two Sn2+ atoms. In the ninth Br1- site, Br1- is bonded in a 2-coordinate geometry to two In1+ and two Sn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on InTe14(IrBr8)2 by Materials Project

(Ir)2InBr4(Te)7(Te2Br3)2(TeBr2)3 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of four iridium molecules, fourteen tellurium molecules, two InBr4 clusters, two Te2Br3 clusters, and two TeBr2 clusters. In each InBr4 cluster, In3+ is bonded in a tetrahedral geometry to four Br1- atoms. There are a spread of In–Br bond distances ranging from 2.54–2.57 Å. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one In3+ atom. In the second Br1- site, Br1- is bonded in a single-bond geometry to one In3+ atom. In the third Br1- site, Br1- is bonded in a single-bond geometry to one In3+ atom. In the fourth Br1- site, Br1- is bonded in a single-bond geometry to one In3+ atom. In each Te2Br3 cluster, there are four inequivalent Te+0.29+ sites. In the first Te+0.29+ site, Te+0.29+ is bonded in a 1-coordinate geometry to one Br1- atom. The Te–Br bond length is 3.39 Å. In the second Te+0.29+ site, Te+0.29+ is bonded in a distorted single-bond geometry to one Br1- atom. The Te–Br bond length is 3.45 Å. In the third Te+0.29+ site, Te+0.29+ is bonded in a rectangular see-saw-like geometry to four Br1- atoms. There are a spread of Te–Br bond distances ranging from 2.64–2.98 Å. In the fourth Te+0.29+ site, Te+0.29+ is bonded in a rectangular see-saw-like geometry to four Br1- atoms. There are a spread of Te–Br bond distances ranging from 2.64–2.98 Å. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In the second Br1- site, Br1- is bonded in a 2-coordinate geometry to three Te+0.29+ atoms. In the third Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In the fourth Br1- site, Br1- is bonded in a 2-coordinate geometry to three Te+0.29+ atoms. In the fifth Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In the sixth Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In each TeBr2 cluster, there are three inequivalent Te+0.29+ sites. In the first Te+0.29+ site, Te+0.29+ is bonded in a single-bond geometry to one Br1- atom. The Te–Br bond length is 3.33 Å. In the second Te+0.29+ site, Te+0.29+ is bonded in a rectangular see-saw-like geometry to four Br1- atoms. There are two shorter (2.67 Å) and two longer (2.94 Å) Te–Br bond lengths. In the third Te+0.29+ site, Te+0.29+ is bonded in a rectangular see-saw-like geometry to four Br1- atoms. There are a spread of Te–Br bond distances ranging from 2.64–3.03 Å. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In the second Br1- site, Br1- is bonded in a 2-coordinate geometry to two Te+0.29+ atoms. In the third Br1- site, Br1- is bonded in a 3-coordinate geometry to three Te+0.29+ atoms. In the fourth Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In the fifth Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom. In the sixth Br1- site, Br1- is bonded in a single-bond geometry to one Te+0.29+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hg8Br3O4 by Materials Project

Hg8O4Br3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are eight inequivalent Hg+1.38+ sites. In the first Hg+1.38+ site, Hg+1.38+ is bonded in a distorted single-bond geometry to one O2- and two equivalent Br1- atoms. The Hg–O bond length is 2.20 Å. There are one shorter (3.14 Å) and one longer (3.50 Å) Hg–Br bond lengths. In the second Hg+1.38+ site, Hg+1.38+ is bonded in a distorted L-shaped geometry to two equivalent O2- and one Br1- atom. There are one shorter (2.21 Å) and one longer (2.65 Å) Hg–O bond lengths. The Hg–Br bond length is 3.24 Å. In the third Hg+1.38+ site, Hg+1.38+ is bonded in a distorted single-bond geometry to one O2- and four Br1- atoms. The Hg–O bond length is 2.27 Å. There are a spread of Hg–Br bond distances ranging from 3.16–3.35 Å. In the fourth Hg+1.38+ site, Hg+1.38+ is bonded in a distorted single-bond geometry to one O2- and two Br1- atoms. The Hg–O bond length is 2.19 Å. There are one shorter (3.10 Å) and one longer (3.16 Å) Hg–Br bond lengths. In the fifth Hg+1.38+ site, Hg+1.38+ is bonded in a 2-coordinate geometry to two O2- and three Br1- atoms. There are one shorter (2.27 Å) and one longer (2.59 Å) Hg–O bond lengths. There are a spread of Hg–Br bond distances ranging from 3.44–3.54 Å. In the sixth Hg+1.38+ site, Hg+1.38+ is bonded in a 4-coordinate geometry to four O2- and two Br1- atoms. There are a spread of Hg–O bond distances ranging from 2.15–2.60 Å. There are one shorter (3.33 Å) and one longer (3.36 Å) Hg–Br bond lengths. In the seventh Hg+1.38+ site, Hg+1.38+ is bonded in a linear geometry to two O2- and four Br1- atoms. Both Hg–O bond lengths are 2.08 Å. There are a spread of Hg–Br bond distances ranging from 3.31–3.66 Å. In the eighth Hg+1.38+ site, Hg+1.38+ is bonded in a 5-coordinate geometry to three O2- and two Br1- atoms. There are a spread of Hg–O bond distances ranging from 2.09–2.63 Å. There are one shorter (3.20 Å) and one longer (3.21 Å) Hg–Br bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four Hg+1.38+ atoms to form distorted edge-sharing OHg4 tetrahedra. In the second O2- site, O2- is bonded to four Hg+1.38+ atoms to form a mixture of edge and corner-sharing OHg4 tetrahedra. In the third O2- site, O2- is bonded to four Hg+1.38+ atoms to form a mixture of distorted edge and corner-sharing OHg4 tetrahedra. In the fourth O2- site, O2- is bonded to four Hg+1.38+ atoms to form a mixture of distorted edge and corner-sharing OHg4 tetrahedra. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 6-coordinate geometry to six Hg+1.38+ atoms. In the second Br1- site, Br1- is bonded in a 7-coordinate geometry to seven Hg+1.38+ atoms. In the third Br1- site, Br1- is bonded in a 7-coordinate geometry to seven Hg+1.38+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Integration of Highly Luminescent Lead Halide Perovskite Nanocrystals on Transparent Lead Halide Nanowire Waveguides through Morphological Transformation and Spontaneous Growth in Water

The integration of highly luminescent CsPbBr 3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing and quantum communications. On the other hand, CsPb 2 Br 5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here we first report the growth of CsPbBr 3 nanocrystals on CsPb 2 Br 5 nanowires by simply immersing CsPbBr 3 powder into pure water, CsPbBr 3-γ X γ (X = Cl, I) nanocrystals on CsPb 2 Br 5-γ X γ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in-situ monitoring, revealed that CsPbBr 3 powder was first converted to CsPb 2 Br 5 microplatelets in water, followed by a morphological transformation from CsPb 2 Br 5 microplatelets to nanowires, which is a kinetic dissolution-recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb 2 Br 5 . CsPbB r3 nanocrystals are spontaneously formed on CsPb 2 Br 5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence and SEM imaging confirm that the bright emission originates from CsPbBr 3-γ X γ nanocrystals while CsPb 2 Br 5-γ X γ nanowires are transparent waveguides. In conclusion, the intimate integration of nanoscale light sources with a nanowire waveguide is demonstrated through the observation of the wave guiding of light from nanocrystals and Fabry-Perot interference modes of the nanowire cavity.

42 ENGINEERING↗
DOE OSTI2023

Preclinical studies of a PARP targeted, Meitner-Auger emitting, theranostic radiopharmaceutical for metastatic ovarian cancer

Advanced ovarian cancer currently has few therapeutic options. Poly(ADP-ribose) polymerase (PARP) inhibitors bind to nuclear PARP and trap the protein-inhibitor complex to DNA. This work investigates a theranostic PARP inhibitor for targeted radiopharmaceutical therapy of ovarian cancer in vitro and PET imaging of healthy mice in vivo. Methods: [ 77 Br]RD1 was synthesized and assessed for pharmacokinetics and cytotoxicity in human and murine ovarian cancer cell lines. [ 76 Br]RD1 biodistribution and organ uptake in healthy mice were quantified through longitudinal PET/CT imaging and ex vivo radioactivity measurements. Organ-level dosimetry following [ 76/77 Br]RD1 administration was calculated using RAPID, an in-house platform for absorbed dose in mice, and OLINDA for equivalent and effective dose in human. Results: The maximum specific binding (B max ), equilibrium dissociation constant (K d ), and nonspecific binding slope (NS) were calculated for each cell line. These values were used to calculate the cell specific activity uptake for cell viability studies. The half maximal effective concentration (EC 50 ) was measured as 0.17 (95 % CI: 0.13–0.24) nM and 0.46 (0.13–0.24) nM for PARP(+) and PARP(–) expressing cell lines, respectively. The EC 50 was 0.27 (0.21–0.36) nM and 0.30 (0.22–0.41) nM for BRCA1(–) and BRCA1(+) expressing cell lines, respectively. When measuring the EC 50 as a function of cellular activity uptake and nuclear dose, the EC 50 ranges from 0.020 to 0.039 Bq/cell and 3.3–9.2 Gy, respectively. Excretion through the hepatobiliary and renal pathways were observed in mice, with liver uptake of 2.3 ± 0.4 %ID/g after 48 h, contributing to estimated absorbed dose values in mice of 19.3 ± 0.3 mGy/MBq and 290 ± 10 mGy/MBq for [ 77 Br]RD1 and [ 76 Br]RD1, respectively. Conclusion: [ 77 Br]RD1 cytotoxicity was dependent on PARP expression and independent of BRCA1 status. Finally, the in vitro results suggest that [ 77 Br]RD1 cytotoxicity is driven by the targeted Meitner-Auger electron (MAe) radiotherapeutic effect of the agent. Further studies investigating the theranostic potential, organ dose, and tumor uptake of [ 76/77 Br]RD1 are warranted.

62 RADIOLOGY AND NUCLEAR MEDICINE↗
DOE OSTI2022

Expanding the Cage of 2D Bromide Perovskites by Large A-Site Cations

Two-dimensional (2D) halide perovskites have outstanding optoelectronic properties, and they feature a variety of organic cation spacers and cage A-site cations that can be incorporated into their structures. It has recently been reported that the Goldschmidt tolerance factor can be relaxed and expanded in iodide 2D perovskites. Bromide 2D perovskites, whose multilayer structures and optical properties are much less studied, provide a great platform for studying structure-property relationships for 2D perovskites with large Asite cations. Herein, we report the synthesis and structure of three new 2D bromide perovskites-(BA)(2)(MHy)(2)Pb3Br10 (BA, butylammonium; MHy, methylhydrazinium), (BA)(2)(EA)(2)Pb3Br10 (EA is ethylammonium), and (BA)(2)(DMA)Pb2Br7 (DMA is dimethylammonium). We compared them with other 2D perovskites with different A-site cations but with the same spacer and layer thickness. Single-crystal structures show that the Pb-Br bonds are elongated to accommodate the large A-site cations. Additionally, the octahedra in (BA)(2)(MHy)(2)Pb3Br10 and (BA)(2)(EA)(2)Pb3Br10 are highly distorted, and their different stacking patterns of the inner and outer layers lead to the formation of the n = 3 phases. Density functional theory calculations show that 2D perovskites with larger A-site cations (e.g., DMA, MHy, and EA) have smaller band dispersions and larger effective masses than those with Cs+ and MA. (BA)(2)(MHy)(2)Pb3Br10 also exhibits one of the largest Rashba splittings in the literature. Structures with large cage cations also exhibit high band gaps within the same n number and short photoluminescence (PL) lifetimes. Temperature- and power-dependent PL measurements reveal that the broad shoulder in the PL peak originates from the trap states.

Emission↗
DOE OSTI2020

Synthesis, Redox, and Spectroscopic Properties of Pd(II) 10,10-Dimethylisocorrole Complexes Prepared via Bromination of Dimethylbiladiene Oligotetrapyrroles

Two brominated 10,10-dimethylisocorrole (10-DMIC) derivatives containing Pd(II) centers have been prepared and characterized. These compounds were prepared via bromination of 10,10-dimethylbiladiene-based oligotetrapyrroles. Bromination of free base 10,10-dimethylbiladiene (DMBil1) followed by metalation with Pd(OAc) 2 , as well as bromination of the corresponding Pd(II) dimethylbiladiene complex (Pd[DMBil1]) provide routes to Pd(II) hexabromo-10,10-dimethyl-5,15-bis(pentafluorophenyl)-isocorrole (Pd[10-DMIC-Br 6 ]) and Pd(II) octabromo-10,10-dimethyl-5,15-bis(pentafluorophenyl)-isocorrole (Pd[10-DMIC-Br 8 ]). The solid-state structures of the two brominated isocorrole complexes are presented, as is that for a new decabrominated dimethylbiladiene derivative (DMBil-Br 10 ). The electronic and spectroscopic properties of the brominated biladiene and isocorrole derivatives were probed using a combination of voltammetric methods and steady-state UV–vis absorption and emission experiments. Data obtained from these experiments allow the properties of the brominated biladiene and isocorrole derivatives to be compared to previously studied biladiene derivatives (i.e., DMBil1 and Pd[DMBil1]). CV and DPV experiments demonstrate that Pd[10-DMIC-Br 6 ] and Pd[10-DMIC-Br 8 ] support well-behaved multielectron redox chemistry, similar to that which has been observed for other nonaromatic tetrapyrroles containing sp 3 -hybridized meso-carbons. Here, spectroscopic experiments reveal that bromination of the dimethylbiladiene core shifts this system’s UV–vis absorption profile to lower energy and that the dimethylisocorrole complexes support panchromatic absorption profiles that extend across the UV–vis and into the near-IR region. Photosensitization experiments demonstrate that unlike previously studied Pd(II) biladiene constructs, DMBil-Br 10 , Pd[10-DMIC-Br 6 ], and Pd[10-DMIC-Br 8 ] support limited triplet excited state chemistry with O 2 , indicating that the novel nonaromatic tetrapyrrole derivatives described in this work may be best suited for applications other than singlet oxygen sensitization.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2024

All-Atom Molecular Dynamics Simulations of Cationic Polyelectrolyte Brushes in the Presence of Halide Counterions

Understanding the response of the charged polyelectrolyte (PE) brushes and brush-supported water and ions to the changes in the nature of screening counterions is significant in developing strategies for utilizing PE brushes in various applications. In this paper, we employ all-atom molecular dynamics (MD) simulations for studying the behavior of cationic [poly(2-(methacryloyloxy)ethyl) trimethylammonium] (PMETA) brushes and brush-supported water and ions in the presence of different halide (X: I – , Br – , Cl – , and F – ) screening counterions. We find that despite the F– ion having the largest charge density, the extent of binding of the counterions on the PMETAX brushes varies as I – > Br – > Cl – > F – , leading to PMETAX brush height being least with I– counterions and greatest with F – counterions. This trend in the binding of the halide ions matches the previous experimental result and can be explained by identifying the chaotropic nature of the I – and Br – ions that promote a disruption of water structure and a more favorable binding of the ions to the polymer chains. Such a binding trend also ensures that the order of the water molecules around the PMETAX chains or the counterions as well as the number of water–water hydrogen bonds inside the brush layer increases in the following order of the counterion-specific PMETAX brushes: F – > Cl – > Br – > I – . Furthermore, halide-ion-PMETAX-chain binding takes place via both interchain and intrachain bridging: intrachain bridging dominates for the case of counterions that show enhanced binding (I – and Br – ), while interchain bridging is more favored for the case of counterions that show weakened binding (F – and Cl – ). Also, a greater degree of intrachain bridging leads to greater compressibility and flexibility of the brush layer. Lastly, we show that the mobility of the halide ions follows a nonmonotonic trend with the charge density: the mobility decreases as I – < Br – < Cl – (as their binding to the PMETAX chains varies as I – > Br – > Cl – ), but the mobility of F – ions is in between that of I – and Br – ions. We argue that the strongly attached hydration layer and the ensuing friction inside the brush layer lead to such a reduced mobility of the F – ions.

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

Materials Data on PBr5 by Materials Project

PBr5 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. P5+ is bonded in a tetrahedral geometry to four Br1- atoms. There are one shorter (2.20 Å) and three longer (2.22 Å) P–Br bond lengths. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one P5+ and one Br1- atom. The Br–Br bond length is 3.14 Å. In the second Br1- site, Br1- is bonded in a single-bond geometry to one P5+ and one Br1- atom. The Br–Br bond length is 3.05 Å. In the third Br1- site, Br1- is bonded in a see-saw-like geometry to four Br1- atoms. The Br–Br bond length is 3.26 Å. In the fourth Br1- site, Br1- is bonded in a single-bond geometry to one P5+ and one Br1- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TlBr2 by Materials Project

TlTlBr4 is Iron carbide-like structured and crystallizes in the orthorhombic Pnna space group. The structure is zero-dimensional and consists of four thallium molecules and four TlBr4 clusters. In each TlBr4 cluster, Tl is bonded in a tetrahedral geometry to four Br atoms. There are two shorter (2.63 Å) and two longer (2.64 Å) Tl–Br bond lengths. There are two inequivalent Br sites. In the first Br site, Br is bonded in a single-bond geometry to one Tl atom. In the second Br site, Br is bonded in a single-bond geometry to one Tl atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KBrO4 by Materials Project

KBrO4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K is bonded in a 10-coordinate geometry to ten O atoms. There are a spread of K–O bond distances ranging from 2.86–3.33 Å. There are three inequivalent O sites. In the first O site, O is bonded to three equivalent K and one Br atom to form a mixture of distorted edge and corner-sharing OK3Br tetrahedra. The O–Br bond length is 1.66 Å. In the second O site, O is bonded in a distorted single-bond geometry to three equivalent K and one Br atom. The O–Br bond length is 1.65 Å. In the third O site, O is bonded in a distorted linear geometry to one K and one Br atom. The O–Br bond length is 1.64 Å. Br is bonded in a tetrahedral geometry to four O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Th6CoBr15 by Materials Project

Th6CoBr15 crystallizes in the cubic Im-3m space group. The structure is three-dimensional and consists of two Th6CoBr15 frameworks. Th is bonded to one Co and five Br atoms to form a mixture of edge and corner-sharing ThCoBr5 octahedra. The corner-sharing octahedral tilt angles are 0°. The Th–Co bond length is 2.79 Å. There are four shorter (2.93 Å) and one longer (3.09 Å) Th–Br bond lengths. Co is bonded in an octahedral geometry to six equivalent Th atoms. There are two inequivalent Br sites. In the first Br site, Br is bonded in an L-shaped geometry to two equivalent Th atoms. In the second Br site, Br is bonded in a linear geometry to two equivalent Th atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Br2O by Materials Project

OBr2 is High Pressure (4-7GPa) Tellurium structured and crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four bromoether molecules. O is bonded in a bent 120 degrees geometry to two Br atoms. There is one shorter (1.87 Å) and one longer (1.98 Å) O–Br bond length. There are two inequivalent Br sites. In the first Br site, Br is bonded in a single-bond geometry to one O atom. In the second Br site, Br is bonded in a single-bond geometry to one O atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La3C2Br3 by Materials Project

La3C2Br3 crystallizes in the orthorhombic C222_1 space group. The structure is three-dimensional. there are seven inequivalent La3+ sites. In the first La3+ site, La3+ is bonded to four C3- and four Br1- atoms to form LaC4Br4 hexagonal bipyramids that share edges with two equivalent LaC4Br4 hexagonal bipyramids, an edgeedge with one LaC2Br4 octahedra, edges with two equivalent LaC3Br4 pentagonal bipyramids, and faces with two equivalent LaC4Br4 hexagonal bipyramids. There are two shorter (2.64 Å) and two longer (2.86 Å) La–C bond lengths. There are two shorter (3.06 Å) and two longer (3.46 Å) La–Br bond lengths. In the second La3+ site, La3+ is bonded to four C3- and four Br1- atoms to form LaC4Br4 hexagonal bipyramids that share a cornercorner with one LaC3Br4 pentagonal bipyramid, an edgeedge with one LaC2Br4 octahedra, edges with two equivalent LaC3Br4 pentagonal bipyramids, and faces with three LaC4Br4 hexagonal bipyramids. There are a spread of La–C bond distances ranging from 2.60–2.85 Å. There are a spread of La–Br bond distances ranging from 3.10–3.40 Å. In the third La3+ site, La3+ is bonded to three C3- and four Br1- atoms to form distorted LaC3Br4 pentagonal bipyramids that share a cornercorner with one LaC4Br4 hexagonal bipyramid, edges with four LaC4Br4 hexagonal bipyramids, an edgeedge with one LaC2Br4 octahedra, an edgeedge with one LaC3Br4 pentagonal bipyramid, and a faceface with one LaC4Br4 hexagonal bipyramid. There are a spread of La–C bond distances ranging from 2.39–2.79 Å. There are a spread of La–Br bond distances ranging from 3.06–3.36 Å. In the fourth La3+ site, La3+ is bonded to four C3- and four Br1- atoms to form LaC4Br4 hexagonal bipyramids that share a cornercorner with one LaC2Br4 octahedra, edges with two LaC4Br4 hexagonal bipyramids, an edgeedge with one LaC2Br4 octahedra, an edgeedge with one LaC3Br4 pentagonal bipyramid, faces with two equivalent LaC4Br4 hexagonal bipyramids, and a faceface with one LaC3Br4 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 7°. There are a spread of La–C bond distances ranging from 2.62–2.85 Å. There are a spread of La–Br bond distances ranging from 3.09–3.34 Å. In the fifth La3+ site, La3+ is bonded in a 7-coordinate geometry to three C3- and four Br1- atoms. There are a spread of La–C bond distances ranging from 2.34–2.78 Å. There are a spread of La–Br bond distances ranging from 3.13–3.24 Å. In the sixth La3+ site, La3+ is bonded to two equivalent C3- and four Br1- atoms to form LaC2Br4 octahedra that share corners with two equivalent LaC4Br4 hexagonal bipyramids, edges with five LaC4Br4 hexagonal bipyramids, and edges with two equivalent LaC3Br4 pentagonal bipyramids. Both La–C bond lengths are 2.39 Å. There are two shorter (3.10 Å) and two longer (3.24 Å) La–Br bond lengths. In the seventh La3+ site, La3+ is bonded in a 7-coordinate geometry to three C3- and four Br1- atoms. There are one shorter (2.34 Å) and two longer (2.75 Å) La–C bond lengths. There are a spread of La–Br bond distances ranging from 3.12–3.25 Å. There are four inequivalent C3- sites. In the first C3- site, C3- is bonded in a 6-coordinate geometry to five La3+ and one C3- atom. The C–C bond length is 1.40 Å. In the second C3- site, C3- is bonded in a 6-coordinate geometry to five La3+ and one C3- atom. In the third C3- site, C3- is bonded in a 6-coordinate geometry to five La3+ and one C3- atom. The C–C bond length is 1.40 Å. In the fourth C3- site, C3- is bonded in a 6-coordinate geometry to five La3+ and one C3- atom. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the second Br1- site, Br1- is bonded in a 4-coordinate geometry to four La3+ atoms. In the third Br1- site, Br1- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the fourth Br1- site, Br1- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the fifth Br1- site, Br1- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the sixth Br1- site, Br1- is bonded in a distorted see-saw-like geometry to four La3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyBr2 by Materials Project

DyBr2 is Baddeleyite-like structured and crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Dy is bonded in a 7-coordinate geometry to seven Br atoms. There are a spread of Dy–Br bond distances ranging from 2.90–3.22 Å. There are two inequivalent Br sites. In the first Br site, Br is bonded to four equivalent Dy atoms to form a mixture of distorted corner and edge-sharing BrDy4 tetrahedra. In the second Br site, Br is bonded in a trigonal planar geometry to three equivalent Dy atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb2SbBr6 by Materials Project

(Rb)2SbBr6 crystallizes in the tetragonal I4_1/amd space group. The structure is zero-dimensional and consists of sixteen rubidium molecules and eight SbBr6 clusters. In each SbBr6 cluster, Sb2- is bonded in an octahedral geometry to six Br atoms. There are four shorter (2.76 Å) and two longer (2.77 Å) Sb–Br bond lengths. There are two inequivalent Br sites. In the first Br site, Br is bonded in a single-bond geometry to one Sb2- atom. In the second Br site, Br is bonded in a single-bond geometry to one Sb2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ta4S9Br8 by Materials Project

Ta4S9Br8 crystallizes in the tetragonal I4mm space group. The structure is zero-dimensional and consists of two Ta4S9Br8 clusters. Ta5+ is bonded to five S2- and two Br+0.25- atoms to form a mixture of face and corner-sharing TaS5Br2 pentagonal bipyramids. There are a spread of Ta–S bond distances ranging from 2.48–2.54 Å. Both Ta–Br bond lengths are 2.50 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 2-coordinate geometry to two equivalent Ta5+ and one S2- atom. The S–S bond length is 2.06 Å. In the second S2- site, S2- is bonded in a 2-coordinate geometry to two equivalent Ta5+ and one S2- atom. In the third S2- site, S2- is bonded in a 4-coordinate geometry to four equivalent Ta5+ atoms. There are two inequivalent Br+0.25- sites. In the first Br+0.25- site, Br+0.25- is bonded in a single-bond geometry to one Ta5+ atom. In the second Br+0.25- site, Br+0.25- is bonded in a single-bond geometry to one Ta5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb2SbBr6 by Materials Project

(Rb)2SbBr6 is alpha bismuth trifluoride-like structured and crystallizes in the tetragonal I4_1/a space group. The structure is zero-dimensional and consists of sixteen rubidium molecules and eight SbBr6 clusters. In each SbBr6 cluster, Sb2- is bonded in an octahedral geometry to six Br atoms. There are two shorter (2.67 Å) and four longer (2.68 Å) Sb–Br bond lengths. There are two inequivalent Br sites. In the first Br site, Br is bonded in a single-bond geometry to one Sb2- atom. In the second Br site, Br is bonded in a single-bond geometry to one Sb2- atom.

36 MATERIALS SCIENCE↗