cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1475907
title: Materials Data on Ca2Ti2O5 by Materials Project

description: Ca2Ti2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.39–2.89 Å. There are two inequivalent Ti3+ sites. In the first Ti3+ site, Ti3+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with four equivalent TiO6 octahedra and corners with two equivalent TiO4 tetrahedra. The corner-sharing octahedral tilt angles are 11°. There are four shorter (1.98 Å) and two longer (2.08 Å) Ti–O bond lengths. In the second Ti3+ site, Ti3+ is bonded to four O2- atoms to form TiO4 tetrahedra that share corners with two equivalent TiO6 octahedra and corners with two equivalent TiO4 tetrahedra. The corner-sharing octahedral tilt angles are 30°. There are a spread of Ti–O bond distances ranging from 1.90–1.98 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Ca2+ and two equivalent Ti3+ atoms to form distorted OCa4Ti2 octahedra that share corners with two equivalent OCa4Ti2 octahedra, corners with four equivalent OCa2Ti2 tetrahedra, edges with two equivalent OCa4Ti2 octahedra, and faces with four equivalent OCa4Ti2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Ca2+ and two Ti3+ atoms. In the third O2- site, O2- is bonded to two equivalent Ca2+ and two equivalent Ti3+ atoms to form distorted OCa2Ti2 tetrahedra that share corners with eight equivalent OCa4Ti2 octahedra and corners with two equivalent OCa2Ti2 tetrahedra. The corner-sharing octahedra tilt angles range from 20–81°.
DOI: 10.17188/1475916
title: Materials Data on Sm2V2O5 by Materials Project

description: Sm2V2O5 is Aluminum carbonitride-like structured and crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Sm3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Sm–O bond distances ranging from 2.31–2.50 Å. There are two inequivalent V2+ sites. In the first V2+ site, V2+ is bonded to six O2- atoms to form VO6 octahedra that share corners with four equivalent VO6 octahedra and corners with two equivalent VO4 tetrahedra. The corner-sharing octahedral tilt angles are 29°. There are four shorter (2.06 Å) and two longer (2.19 Å) V–O bond lengths. In the second V2+ site, V2+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with two equivalent VO6 octahedra and corners with two equivalent VO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of V–O bond distances ranging from 2.05–2.18 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sm3+ and two equivalent V2+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sm3+ and two V2+ atoms. In the third O2- site, O2- is bonded to two equivalent Sm3+ and two equivalent V2+ atoms to form corner-sharing OSm2V2 tetrahedra.
DOI: 10.17188/1475920
title: Materials Data on Sm2Cu2O5 by Materials Project

description: Sm2Cu2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Sm3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.24–2.88 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with four equivalent CuO6 octahedra and corners with two equivalent CuO4 trigonal pyramids. The corner-sharing octahedral tilt angles are 17°. There are four shorter (1.94 Å) and two longer (2.15 Å) Cu–O bond lengths. In the second Cu2+ site, Cu2+ is bonded to four O2- atoms to form distorted CuO4 trigonal pyramids that share corners with two equivalent CuO6 octahedra and corners with two equivalent CuO4 trigonal pyramids. The corner-sharing octahedral tilt angles are 33°. There are a spread of Cu–O bond distances ranging from 1.93–2.17 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Sm3+ and two equivalent Cu2+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sm3+ and two Cu2+ atoms. In the third O2- site, O2- is bonded to two equivalent Sm3+ and two equivalent Cu2+ atoms to form corner-sharing OSm2Cu2 tetrahedra.
DOI: 10.17188/1475921
title: Materials Data on K2W2O5 by Materials Project

description: K2W2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.62–3.10 Å. There are two inequivalent W4+ sites. In the first W4+ site, W4+ is bonded to six O2- atoms to form WO6 octahedra that share corners with four equivalent WO6 octahedra and corners with two equivalent WO4 tetrahedra. The corner-sharing octahedral tilt angles are 8°. There are a spread of W–O bond distances ranging from 2.09–2.21 Å. In the second W4+ site, W4+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with two equivalent WO6 octahedra and corners with two equivalent WO4 tetrahedra. The corner-sharing octahedral tilt angles are 28°. There are a spread of W–O bond distances ranging from 1.92–2.04 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent K1+ and two equivalent W4+ atoms to form distorted OK4W2 octahedra that share corners with two equivalent OK4W2 octahedra, corners with four equivalent OK2W2 tetrahedra, edges with two equivalent OK4W2 octahedra, and faces with four equivalent OK4W2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three equivalent K1+ and two W4+ atoms. In the third O2- site, O2- is bonded to two equivalent K1+ and two equivalent W4+ atoms to form distorted OK2W2 tetrahedra that share corners with eight equivalent OK4W2 octahedra and corners with two equivalent OK2W2 tetrahedra. The corner-sharing octahedra tilt angles range from 19–83°.
DOI: 10.17188/1475926
title: Materials Data on SmAgO3 by Materials Project

description: SmAgO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm3+ is bonded to twelve equivalent O2- atoms to form SmO12 cuboctahedra that share corners with twelve equivalent SmO12 cuboctahedra, faces with six equivalent SmO12 cuboctahedra, and faces with eight equivalent AgO6 octahedra. All Sm–O bond lengths are 2.88 Å. Ag3+ is bonded to six equivalent O2- atoms to form AgO6 octahedra that share corners with six equivalent AgO6 octahedra and faces with eight equivalent SmO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–O bond lengths are 2.03 Å. O2- is bonded in a distorted linear geometry to four equivalent Sm3+ and two equivalent Ag3+ atoms.
DOI: 10.17188/1475933
title: Materials Data on Eu2Ti2O5 by Materials Project

description: Eu2Ti2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Eu2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Eu–O bond distances ranging from 2.50–3.07 Å. There are two inequivalent Ti3+ sites. In the first Ti3+ site, Ti3+ is bonded to six O2- atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles are 9°. There are a spread of Ti–O bond distances ranging from 1.97–2.01 Å. In the second Ti3+ site, Ti3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Ti–O bond distances ranging from 1.93–1.95 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Eu2+ and two equivalent Ti3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Eu2+ and two Ti3+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Eu2+ and two equivalent Ti3+ atoms.
DOI: 10.5281/zenodo.4483228
title: HUMAN4D - Subject #1 (multi-RGBD + 2d/3d pose)

description: <strong>HUMAN4D: A Human-Centric Multimodal Dataset for Motions & Immersive Media (Subject #1)</strong> <strong>The dataset was captured with the use of VCL Volumetric Capture free software (https://github.com/VCL3D/VolumetricCapture) </strong> device_repository.json includes the camera instrinsic parameters. pose.zip includes the camera extrinsic calibration parameters. offsets.zip include the frame offset between the pose ids (name_of_file==id) and the group frame ids of the RGBD data (first number before underscore in the filename of each file) S1_activities.txt files that maps the zip filenames with data for specific activities. HUMAN4D is a large and multimodal 4D dataset that contains a variety of human activities simultaneously captured by a professional marker-based MoCap, a volumetric capture and an audio recording system. By capturing 2 female and 2 male professional actors performing various full-body movements and expressions, HUMAN4D provides a diverse set of motions and poses encountered as part of single- and multi-person daily, physical and social activities (jumping, dancing, etc.), along with multi-RGBD (mRGBD), volumetric and audio data. Despite the existence of multi-view color datasets captured with the use of hardware (HW) synchronization, to the best of our knowledge, HUMAN4D is the first and only public resource that provides volumetric depth maps with high synchronization precision due to the use of intra- and inter-sensor HW-SYNC.
DOI: 10.5281/zenodo.4459399
title: HUMAN4D - Subject #1 (multi-RGBD + 2d/3d pose)

description: <strong>HUMAN4D: A Human-Centric Multimodal Dataset for Motions & Immersive Media (Subject #1)</strong> <strong>The dataset was captured with the use of VCL Volumetric Capture free software (https://github.com/VCL3D/VolumetricCapture) </strong> device_repository.json includes the camera instrinsic parameters. pose.zip includes the camera extrinsic calibration parameters. offsets.zip include the frame offset between the pose ids (name_of_file==id) and the group frame ids of the RGBD data (first number before underscore in the filename of each file) S1_activities.txt files that maps the zip filenames with data for specific activities. HUMAN4D is a large and multimodal 4D dataset that contains a variety of human activities simultaneously captured by a professional marker-based MoCap, a volumetric capture and an audio recording system. By capturing 2 female and 2 male professional actors performing various full-body movements and expressions, HUMAN4D provides a diverse set of motions and poses encountered as part of single- and multi-person daily, physical and social activities (jumping, dancing, etc.), along with multi-RGBD (mRGBD), volumetric and audio data. Despite the existence of multi-view color datasets captured with the use of hardware (HW) synchronization, to the best of our knowledge, HUMAN4D is the first and only public resource that provides volumetric depth maps with high synchronization precision due to the use of intra- and inter-sensor HW-SYNC.
DOI: 10.17188/1475942
title: Materials Data on KNa7V8O24 by Materials Project

description: KNa7V8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent O2- atoms to form KO12 cuboctahedra that share corners with twelve equivalent NaO12 cuboctahedra, faces with six equivalent NaO12 cuboctahedra, and faces with eight equivalent VO6 octahedra. All K–O bond lengths are 2.69 Å. There are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with twelve NaO12 cuboctahedra, faces with two equivalent KO12 cuboctahedra, faces with four equivalent NaO12 cuboctahedra, and faces with eight equivalent VO6 octahedra. All Na–O bond lengths are 2.67 Å. In the second Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with four equivalent KO12 cuboctahedra, corners with eight equivalent NaO12 cuboctahedra, faces with six NaO12 cuboctahedra, and faces with eight equivalent VO6 octahedra. There are four shorter (2.65 Å) and eight longer (2.67 Å) Na–O bond lengths. In the third Na1+ site, Na1+ is bonded to twelve equivalent O2- atoms to form NaO12 cuboctahedra that share corners with twelve equivalent NaO12 cuboctahedra, faces with six equivalent NaO12 cuboctahedra, and faces with eight equivalent VO6 octahedra. All Na–O bond lengths are 2.67 Å. V5+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six equivalent VO6 octahedra, a faceface with one KO12 cuboctahedra, and faces with seven NaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. All V–O bond lengths are 1.89 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one K1+, three Na1+, and two equivalent V5+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to four Na1+ and two equivalent V5+ atoms.
DOI: 10.17188/1475943
title: Materials Data on SmCuO3 by Materials Project

description: SmCuO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sm3+ is bonded to twelve equivalent O2- atoms to form SmO12 cuboctahedra that share corners with twelve equivalent SmO12 cuboctahedra, faces with six equivalent SmO12 cuboctahedra, and faces with eight equivalent CuO6 octahedra. All Sm–O bond lengths are 2.69 Å. Cu3+ is bonded to six equivalent O2- atoms to form CuO6 octahedra that share corners with six equivalent CuO6 octahedra and faces with eight equivalent SmO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Cu–O bond lengths are 1.90 Å. O2- is bonded in a distorted linear geometry to four equivalent Sm3+ and two equivalent Cu3+ atoms.
DOI: 10.17188/1475947
title: Materials Data on MgCuO3 by Materials Project

description: MgCuO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Mg is bonded to twelve equivalent O atoms to form MgO12 cuboctahedra that share corners with twelve equivalent MgO12 cuboctahedra, faces with six equivalent MgO12 cuboctahedra, and faces with eight equivalent CuO6 octahedra. All Mg–O bond lengths are 2.64 Å. Cu is bonded to six equivalent O atoms to form CuO6 octahedra that share corners with six equivalent CuO6 octahedra and faces with eight equivalent MgO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Cu–O bond lengths are 1.87 Å. O is bonded in a distorted linear geometry to four equivalent Mg and two equivalent Cu atoms.
DOI: 10.17188/1475949
title: Materials Data on Ca7MgMn8O24 by Materials Project

description: Ca7MgMn8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. there are three inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded to twelve O2- atoms to form CaO12 cuboctahedra that share corners with twelve CaO12 cuboctahedra, faces with two equivalent MgO12 cuboctahedra, faces with four equivalent CaO12 cuboctahedra, and faces with eight equivalent MnO6 octahedra. All Ca–O bond lengths are 2.68 Å. In the second Ca2+ site, Ca2+ is bonded to twelve O2- atoms to form CaO12 cuboctahedra that share corners with four equivalent MgO12 cuboctahedra, corners with eight equivalent CaO12 cuboctahedra, faces with six CaO12 cuboctahedra, and faces with eight equivalent MnO6 octahedra. There are eight shorter (2.68 Å) and four longer (2.71 Å) Ca–O bond lengths. In the third Ca2+ site, Ca2+ is bonded to twelve equivalent O2- atoms to form CaO12 cuboctahedra that share corners with twelve equivalent CaO12 cuboctahedra, faces with six equivalent CaO12 cuboctahedra, and faces with eight equivalent MnO6 octahedra. All Ca–O bond lengths are 2.68 Å. Mg2+ is bonded to twelve equivalent O2- atoms to form MgO12 cuboctahedra that share corners with twelve equivalent CaO12 cuboctahedra, faces with six equivalent CaO12 cuboctahedra, and faces with eight equivalent MnO6 octahedra. All Mg–O bond lengths are 2.65 Å. Mn4+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent MnO6 octahedra, a faceface with one MgO12 cuboctahedra, and faces with seven CaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There is three shorter (1.89 Å) and three longer (1.90 Å) Mn–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to three Ca2+, one Mg2+, and two equivalent Mn4+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to four Ca2+ and two equivalent Mn4+ atoms.
DOI: 10.17188/1475950
title: Materials Data on La2Mn2O5 by Materials Project

description: La2Mn2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.36–2.94 Å. There are two inequivalent Mn2+ sites. In the first Mn2+ site, Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four equivalent MnO6 octahedra and corners with two equivalent MnO4 tetrahedra. The corner-sharing octahedral tilt angles are 22°. There are a spread of Mn–O bond distances ranging from 2.09–2.35 Å. In the second Mn2+ site, Mn2+ is bonded to four O2- atoms to form MnO4 tetrahedra that share corners with two equivalent MnO6 octahedra and corners with two equivalent MnO4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. There are a spread of Mn–O bond distances ranging from 2.04–2.15 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent La3+ and two equivalent Mn2+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent La3+ and two Mn2+ atoms. In the third O2- site, O2- is bonded to two equivalent La3+ and two equivalent Mn2+ atoms to form distorted corner-sharing OLa2Mn2 tetrahedra.
DOI: 10.17188/1475952
title: Materials Data on Mg2Ti2O5 by Materials Project

description: Mg2Ti2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Mg2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Mg–O bond distances ranging from 2.02–2.67 Å. There are two inequivalent Ti3+ sites. In the first Ti3+ site, Ti3+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with four equivalent TiO6 octahedra and corners with two equivalent TiO4 tetrahedra. The corner-sharing octahedral tilt angles are 30°. There are a spread of Ti–O bond distances ranging from 1.96–2.09 Å. In the second Ti3+ site, Ti3+ is bonded to four O2- atoms to form TiO4 tetrahedra that share corners with two equivalent TiO6 octahedra and corners with two equivalent TiO4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of Ti–O bond distances ranging from 1.95–2.04 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Mg2+ and two equivalent Ti3+ atoms. In the second O2- site, O2- is bonded to two equivalent Mg2+ and two Ti3+ atoms to form corner-sharing OMg2Ti2 tetrahedra. In the third O2- site, O2- is bonded to two equivalent Mg2+ and two equivalent Ti3+ atoms to form corner-sharing OMg2Ti2 tetrahedra.
DOI: 10.17188/1475955
title: Materials Data on Eu2Cu2O5 by Materials Project

description: Eu2Cu2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Eu3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.31–2.87 Å. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with four equivalent CuO6 octahedra and corners with two equivalent CuO4 tetrahedra. The corner-sharing octahedral tilt angles are 11°. There are a spread of Cu–O bond distances ranging from 1.93–2.16 Å. In the second Cu2+ site, Cu2+ is bonded to four O2- atoms to form CuO4 tetrahedra that share corners with two equivalent CuO6 octahedra and corners with two equivalent CuO4 tetrahedra. The corner-sharing octahedral tilt angles are 31°. There are a spread of Cu–O bond distances ranging from 1.90–2.05 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Eu3+ and two equivalent Cu2+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Eu3+ and two Cu2+ atoms. In the third O2- site, O2- is bonded to two equivalent Eu3+ and two equivalent Cu2+ atoms to form corner-sharing OEu2Cu2 tetrahedra.
DOI: 10.17188/1475956
title: Materials Data on Ba2Fe2O5 by Materials Project

description: Ba2Fe2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.63–3.27 Å. There are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four equivalent FeO6 octahedra and corners with two equivalent FeO4 tetrahedra. The corner-sharing octahedral tilt angles are 4°. There are a spread of Fe–O bond distances ranging from 2.07–2.31 Å. In the second Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two equivalent FeO6 octahedra and corners with two equivalent FeO4 tetrahedra. The corner-sharing octahedral tilt angles are 26°. All Fe–O bond lengths are 1.92 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Ba2+ and two equivalent Fe3+ atoms to form distorted OBa4Fe2 octahedra that share corners with two equivalent OBa4Fe2 octahedra, corners with four equivalent OBa2Fe2 tetrahedra, edges with two equivalent OBa4Fe2 octahedra, and faces with four equivalent OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Ba2+ and two Fe3+ atoms. In the third O2- site, O2- is bonded to two equivalent Ba2+ and two equivalent Fe3+ atoms to form distorted OBa2Fe2 tetrahedra that share corners with eight equivalent OBa4Fe2 octahedra and corners with two equivalent OBa2Fe2 tetrahedra. The corner-sharing octahedra tilt angles range from 16–81°.
DOI: 10.17188/1475958
title: Materials Data on Rb2Ta2O5 by Materials Project

description: Rb2Ta2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Rb1+ is bonded in a distorted q6 geometry to ten O2- atoms. There are a spread of Rb–O bond distances ranging from 2.85–2.99 Å. There are two inequivalent Ta4+ sites. In the first Ta4+ site, Ta4+ is bonded to six O2- atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Ta–O bond distances ranging from 2.04–2.11 Å. In the second Ta4+ site, Ta4+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Ta–O bond distances ranging from 1.94–1.98 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to four equivalent Rb1+ and two equivalent Ta4+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent Rb1+ and two Ta4+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to four equivalent Rb1+ and two equivalent Ta4+ atoms.