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Materials Data on RbMg6Mo by Materials Project

RbMg6Mo crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Rb is bonded to twelve Mg atoms to form RbMg12 cuboctahedra that share corners with four equivalent RbMg12 cuboctahedra, corners with eight equivalent MoMg12 cuboctahedra, edges with eight equivalent MgRb2Mg8Mo2 cuboctahedra, faces with two equivalent RbMg12 cuboctahedra, faces with four equivalent MgRb2Mg8Mo2 cuboctahedra, and faces with four equivalent MoMg12 cuboctahedra. There are a spread of Rb–Mg bond distances ranging from 3.47–3.57 Å. There are four inequivalent Mg sites. In the first Mg site, Mg is bonded to two equivalent Rb, eight Mg, and two equivalent Mo atoms to form MgRb2Mg8Mo2 cuboctahedra that share corners with twelve equivalent MgRb2Mg8Mo2 cuboctahedra, edges with four equivalent RbMg12 cuboctahedra, edges with four equivalent MoMg12 cuboctahedra, faces with two equivalent RbMg12 cuboctahedra, faces with two equivalent MoMg12 cuboctahedra, and faces with six equivalent MgRb2Mg8Mo2 cuboctahedra. There are six shorter (3.25 Å) and two longer (3.26 Å) Mg–Mg bond lengths. There are one shorter (3.46 Å) and one longer (3.47 Å) Mg–Mo bond lengths. In the second Mg site, Mg is bonded in a distorted L-shaped geometry to two equivalent Rb, four equivalent Mg, and two equivalent Mo atoms. Both Mg–Mo bond lengths are 2.90 Å. In the third Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Rb, four equivalent Mg, and two equivalent Mo atoms. Both Mg–Mo bond lengths are 2.90 Å. In the fourth Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Rb, four equivalent Mg, and two equivalent Mo atoms. Both Mg–Mo bond lengths are 2.90 Å. Mo is bonded to twelve Mg atoms to form distorted MoMg12 cuboctahedra that share corners with four equivalent MoMg12 cuboctahedra, corners with eight equivalent RbMg12 cuboctahedra, edges with eight equivalent MgRb2Mg8Mo2 cuboctahedra, faces with two equivalent MoMg12 cuboctahedra, faces with four equivalent RbMg12 cuboctahedra, and faces with four equivalent MgRb2Mg8Mo2 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbMg6Zr by Materials Project

RbMg6Zr crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Rb is bonded to twelve Mg atoms to form RbMg12 cuboctahedra that share corners with four equivalent RbMg12 cuboctahedra, corners with eight equivalent ZrMg12 cuboctahedra, faces with two equivalent RbMg12 cuboctahedra, and faces with four equivalent ZrMg12 cuboctahedra. There are a spread of Rb–Mg bond distances ranging from 3.41–3.67 Å. There are four inequivalent Mg sites. In the first Mg site, Mg is bonded in a 12-coordinate geometry to two equivalent Rb, eight Mg, and two equivalent Zr atoms. There are a spread of Mg–Mg bond distances ranging from 3.33–3.45 Å. There are one shorter (3.38 Å) and one longer (3.45 Å) Mg–Zr bond lengths. In the second Mg site, Mg is bonded in a 10-coordinate geometry to two equivalent Rb, six Mg, and two equivalent Zr atoms. There are one shorter (2.95 Å) and one longer (3.01 Å) Mg–Mg bond lengths. Both Mg–Zr bond lengths are 3.17 Å. In the third Mg site, Mg is bonded in a distorted q6 geometry to two equivalent Rb, six Mg, and two equivalent Zr atoms. Both Mg–Zr bond lengths are 3.18 Å. In the fourth Mg site, Mg is bonded in a 10-coordinate geometry to two equivalent Rb, six Mg, and two equivalent Zr atoms. Both Mg–Zr bond lengths are 3.14 Å. Zr is bonded to twelve Mg atoms to form ZrMg12 cuboctahedra that share corners with four equivalent ZrMg12 cuboctahedra, corners with eight equivalent RbMg12 cuboctahedra, faces with two equivalent ZrMg12 cuboctahedra, and faces with four equivalent RbMg12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb2PH6(SO)3 by Materials Project

Rb2PH6(SO)3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 2-coordinate geometry to one H1+, five S2-, and two O2- atoms. The Rb–H bond length is 3.03 Å. There are a spread of Rb–S bond distances ranging from 3.34–3.61 Å. There are one shorter (2.88 Å) and one longer (2.93 Å) Rb–O bond lengths. In the second Rb1+ site, Rb1+ is bonded in a 1-coordinate geometry to two H1+, seven S2-, and one O2- atom. There are one shorter (3.13 Å) and one longer (3.24 Å) Rb–H bond lengths. There are a spread of Rb–S bond distances ranging from 3.49–3.92 Å. The Rb–O bond length is 3.12 Å. P4+ is bonded in a trigonal non-coplanar geometry to three S2- atoms. There are two shorter (2.03 Å) and one longer (2.04 Å) P–S bond lengths. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one Rb1+ and one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one Rb1+ and one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one Rb1+ and one O2- atom. The H–O bond length is 1.00 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted single-bond geometry to four Rb1+ and one P4+ atom. In the second S2- site, S2- is bonded in a distorted single-bond geometry to four Rb1+ and one P4+ atom. In the third S2- site, S2- is bonded in a distorted single-bond geometry to four Rb1+ and one P4+ atom. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a water-like geometry to one Rb1+ and two H1+ atoms. In the second O2- site, O2- is bonded in a water-like geometry to one Rb1+ and two H1+ atoms. In the third O2- site, O2- is bonded in a water-like geometry to one Rb1+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbHfMg30O31 by Materials Project

RbMg30HfO31 crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. Rb is bonded to six O atoms to form RbO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent HfO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Rb–O bond distances ranging from 2.39–2.43 Å. There are sixteen inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent RbO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Mg–O bond distances ranging from 1.91–2.23 Å. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent HfO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Mg–O bond distances ranging from 2.11–2.20 Å. In the third Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent RbO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 1.90–2.23 Å. In the fourth Mg site, Mg is bonded to five O atoms to form MgO5 square pyramids that share corners with four MgO6 octahedra, a cornercorner with one HfO5 square pyramid, corners with four MgO5 square pyramids, and edges with eight MgO6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Mg–O bond distances ranging from 2.11–2.19 Å. In the fifth Mg site, Mg is bonded to six O atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Mg–O bond distances ranging from 2.10–2.19 Å. In the sixth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Mg–O bond distances ranging from 2.13–2.17 Å. In the seventh Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, an edgeedge with one RbO6 octahedra, edges with eight MgO6 octahedra, an edgeedge with one HfO5 square pyramid, and edges with two MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 2–13°. There are a spread of Mg–O bond distances ranging from 2.08–2.28 Å. In the eighth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with nine MgO6 octahedra, and edges with three MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of Mg–O bond distances ranging from 2.15–2.19 Å. In the ninth Mg site, Mg is bonded to five O atoms to form MgO5 square pyramids that share corners with four MgO6 octahedra, a cornercorner with one HfO5 square pyramid, corners with four MgO5 square pyramids, an edgeedge with one RbO6 octahedra, and edges with seven MgO6 octahedra. The corner-sharing octahedra tilt angles range from 4–13°. There are a spread of Mg–O bond distances ranging from 2.06–2.36 Å. In the tenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 1–4°. There are four shorter (2.15 Å) and two longer (2.19 Å) Mg–O bond lengths. In the eleventh Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, an edgeedge with one RbO6 octahedra, edges with nine MgO6 octahedra, an edgeedge with one MgO5 square pyramid, and an edgeedge with one HfO5 square pyramid. The corner-sharing octahedra tilt angles range from 2–9°. There are one shorter (2.10 Å) and five longer (2.17 Å) Mg–O bond lengths. In the twelfth Mg site, Mg is bonded to six O atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of Mg–O bond distances ranging from 2.14–2.18 Å. In the thirteenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, an edgeedge with one RbO6 octahedra, edges with nine MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 0–12°. There are a spread of Mg–O bond distances ranging from 2.11–2.24 Å. In the fourteenth Mg site, Mg is bonded to five O atoms to form MgO5 square pyramids that share corners with four MgO6 octahedra, a cornercorner with one HfO5 square pyramid, corners with four MgO5 square pyramids, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–3°. There are a spread of Mg–O bond distances ranging from 2.10–2.25 Å. In the fifteenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, an edgeedge with one RbO6 octahedra, and edges with eleven MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–11°. There are a spread of Mg–O bond distances ranging from 2.12–2.21 Å. In the sixteenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with ten MgO6 octahedra, an edgeedge with one MgO5 square pyramid, and an edgeedge with one HfO5 square pyramid. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.14–2.18 Å. Hf is bonded to five O atoms to form distorted HfO5 square pyramids that share corners with two equivalent RbO6 octahedra, corners with two equivalent MgO6 octahedra, corners with five MgO5 square pyramids, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 7–10°. There are a spread of Hf–O bond distances ranging from 1.97–2.37 Å. There are seventeen inequivalent O sites. In the first O site, O is bonded to one Rb and five Mg atoms to form a mixture of edge and corner-sharing ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the second O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six ORbMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the third O site, O is bonded to six Mg atoms to form a mixture of edge and corner-sharing OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the fourth O site, O is bonded to one Rb and five Mg atoms to form ORbMg5 octahedra that share corners with six ORbMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the fifth O site, O is bonded to five Mg and one Hf atom to form OHfMg5 octahedra that share corners with four ORbMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–3°. In the sixth O site, O is bonded to six Mg atoms to form a mixture of edge and corner-sharing OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the seventh O site, O is bonded to six Mg atoms to form a mixture of edge and corner-sharing OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the eighth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra and edges with eleven ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 1–6°. In the ninth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra and edges with twelve ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 1–4°. In the tenth O site, O is bonded to one Rb, four Mg, and one Hf atom to form ORbHfMg4 octahedra that share corners with six OMg6 octahedra and edges with eleven ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 4–15°. In the eleventh O site, O is bonded to six Mg atoms to form a mixture of edge and corner-sharing OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. In the twelfth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra and edges with eleven ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. In the thirteenth O site, O is bonded to six Mg atoms to form a mixture of edge and corner-sharing OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–3°. In the fourteenth O site, O is bonded to one Rb and five Mg atoms to form ORbMg5 octahedra that share corners with six OHfMg5 octahedra and edges with twelve ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the fifteenth O site, O is bonded to five Mg and one Hf atom to form OHfMg5 octahedra that share corners with six OHfMg5 octahedra and edges with eleven OMg6 octahedra. The corner-sharing octahedra tilt angles range from 1–12°. In the sixteenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra and edges with twelve ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the seventeenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OHfMg5 octahedra and edges with eleven OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbMg6Mo by Materials Project

RbMg6Mo crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Rb is bonded in a 8-coordinate geometry to twelve Mg atoms. There are a spread of Rb–Mg bond distances ranging from 3.17–3.63 Å. There are four inequivalent Mg sites. In the first Mg site, Mg is bonded in a 4-coordinate geometry to two equivalent Rb, four Mg, and two equivalent Mo atoms. There are a spread of Mg–Mg bond distances ranging from 3.18–3.40 Å. Both Mg–Mo bond lengths are 2.97 Å. In the second Mg site, Mg is bonded to two equivalent Rb and ten Mg atoms to form a mixture of distorted face and corner-sharing MgRb2Mg10 cuboctahedra. There are four shorter (3.10 Å) and two longer (3.39 Å) Mg–Mg bond lengths. In the third Mg site, Mg is bonded in a 1-coordinate geometry to two equivalent Rb, four Mg, and two equivalent Mo atoms. There are one shorter (3.06 Å) and one longer (3.26 Å) Mg–Mg bond lengths. There are one shorter (2.85 Å) and one longer (3.46 Å) Mg–Mo bond lengths. In the fourth Mg site, Mg is bonded in a 4-coordinate geometry to two equivalent Rb, ten Mg, and two equivalent Mo atoms. Both Mg–Mo bond lengths are 3.59 Å. Mo is bonded in a 8-coordinate geometry to ten Mg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbMg6W by Materials Project

RbMg6W crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Rb is bonded to twelve Mg atoms to form RbMg12 cuboctahedra that share corners with four equivalent RbMg12 cuboctahedra, corners with eight equivalent WMg12 cuboctahedra, edges with eight equivalent MgRb2Mg8W2 cuboctahedra, faces with two equivalent RbMg12 cuboctahedra, faces with four equivalent MgRb2Mg8W2 cuboctahedra, and faces with four equivalent WMg12 cuboctahedra. There are a spread of Rb–Mg bond distances ranging from 3.37–3.54 Å. There are four inequivalent Mg sites. In the first Mg site, Mg is bonded to two equivalent Rb, eight Mg, and two equivalent W atoms to form distorted MgRb2Mg8W2 cuboctahedra that share corners with twelve equivalent MgRb2Mg8W2 cuboctahedra, edges with four equivalent RbMg12 cuboctahedra, edges with four equivalent WMg12 cuboctahedra, faces with two equivalent RbMg12 cuboctahedra, faces with two equivalent WMg12 cuboctahedra, and faces with six equivalent MgRb2Mg8W2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.24–3.27 Å. There are one shorter (3.36 Å) and one longer (3.38 Å) Mg–W bond lengths. In the second Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Rb, four equivalent Mg, and two equivalent W atoms. Both Mg–W bond lengths are 2.95 Å. In the third Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Rb, four equivalent Mg, and two equivalent W atoms. Both Mg–W bond lengths are 2.94 Å. In the fourth Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Rb, four equivalent Mg, and two equivalent W atoms. Both Mg–W bond lengths are 2.93 Å. W is bonded to twelve Mg atoms to form WMg12 cuboctahedra that share corners with four equivalent WMg12 cuboctahedra, corners with eight equivalent RbMg12 cuboctahedra, edges with eight equivalent MgRb2Mg8W2 cuboctahedra, faces with two equivalent WMg12 cuboctahedra, faces with four equivalent RbMg12 cuboctahedra, and faces with four equivalent MgRb2Mg8W2 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb3Ti by Materials Project

Rb3Ti is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Rb is bonded in a 12-coordinate geometry to eight equivalent Rb and four equivalent Ti atoms. There are a spread of Rb–Rb bond distances ranging from 4.16–4.66 Å. There are two shorter (4.30 Å) and two longer (4.41 Å) Rb–Ti bond lengths. Ti is bonded to twelve equivalent Rb atoms to form a mixture of face and corner-sharing TiRb12 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbNd(ClO)4 by Materials Project

RbNd(OCl)4 crystallizes in the orthorhombic P2_12_12 space group. The structure is three-dimensional. Rb is bonded in a 8-coordinate geometry to four O and four equivalent Cl atoms. There are two shorter (3.26 Å) and two longer (3.48 Å) Rb–O bond lengths. There are two shorter (3.18 Å) and two longer (3.69 Å) Rb–Cl bond lengths. Nd is bonded in a 6-coordinate geometry to two equivalent O and four Cl atoms. Both Nd–O bond lengths are 2.38 Å. There are two shorter (2.70 Å) and two longer (2.97 Å) Nd–Cl bond lengths. There are two inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to one Rb and one O atom. The O–O bond length is 1.23 Å. In the second O site, O is bonded in a distorted water-like geometry to one Rb, one Nd, and one Cl atom. The O–Cl bond length is 1.68 Å. There are two inequivalent Cl sites. In the first Cl site, Cl is bonded in a distorted water-like geometry to one Nd and one O atom. In the second Cl site, Cl is bonded in a distorted trigonal planar geometry to two equivalent Rb and one Nd atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbMg30BO31 by Materials Project

RbMg30BO31 crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. Rb is bonded to six O atoms to form RbO6 octahedra that share corners with four MgO6 octahedra, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Rb–O bond distances ranging from 2.38–2.47 Å. There are sixteen inequivalent Mg sites. In the first Mg site, Mg is bonded in a T-shaped geometry to three O atoms. There are two shorter (1.88 Å) and one longer (2.15 Å) Mg–O bond lengths. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent RbO6 octahedra, corners with two equivalent MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Mg–O bond distances ranging from 1.91–2.28 Å. In the third Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent RbO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 1.91–2.25 Å. In the fourth Mg site, Mg is bonded to five O atoms to form MgO5 square pyramids that share corners with four MgO6 octahedra, corners with four MgO5 square pyramids, and edges with eight MgO6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Mg–O bond distances ranging from 2.10–2.16 Å. In the fifth Mg site, Mg is bonded to six O atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.07–2.20 Å. In the sixth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with ten MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedral tilt angles are 2°. There are a spread of Mg–O bond distances ranging from 1.98–2.23 Å. In the seventh Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, an edgeedge with one RbO6 octahedra, edges with seven MgO6 octahedra, and edges with two MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 4–33°. There are a spread of Mg–O bond distances ranging from 2.02–2.31 Å. In the eighth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with nine MgO6 octahedra, and edges with three MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 2–4°. There are a spread of Mg–O bond distances ranging from 2.14–2.19 Å. In the ninth Mg site, Mg is bonded to five O atoms to form MgO5 square pyramids that share corners with four MgO6 octahedra, corners with four MgO5 square pyramids, an edgeedge with one RbO6 octahedra, and edges with seven MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–15°. There are a spread of Mg–O bond distances ranging from 2.15–2.19 Å. In the tenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with nine MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 4–14°. There are a spread of Mg–O bond distances ranging from 2.13–2.25 Å. In the eleventh Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, an edgeedge with one RbO6 octahedra, edges with nine MgO6 octahedra, and an edgeedge with one MgO5 square pyramid. The corner-sharing octahedra tilt angles range from 2–13°. There are a spread of Mg–O bond distances ranging from 2.14–2.20 Å. In the twelfth Mg site, Mg is bonded to six O atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 4–5°. There are a spread of Mg–O bond distances ranging from 2.06–2.30 Å. In the thirteenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, an edgeedge with one RbO6 octahedra, edges with nine MgO6 octahedra, and edges with two equivalent MgO5 square pyramids. The corner-sharing octahedra tilt angles range from 1–11°. There are a spread of Mg–O bond distances ranging from 2.11–2.20 Å. In the fourteenth Mg site, Mg is bonded to five O atoms to form MgO5 square pyramids that share corners with four MgO6 octahedra, corners with four MgO5 square pyramids, and edges with seven MgO6 octahedra. The corner-sharing octahedra tilt angles range from 3–35°. There are a spread of Mg–O bond distances ranging from 1.99–2.39 Å. In the fifteenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, an edgeedge with one RbO6 octahedra, and edges with eleven MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–12°. There are a spread of Mg–O bond distances ranging from 2.14–2.21 Å. In the sixteenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with four MgO6 octahedra, corners with two equivalent MgO5 square pyramids, edges with nine MgO6 octahedra, and an edgeedge with one MgO5 square pyramid. The corner-sharing octahedra tilt angles range from 3–8°. There are a spread of Mg–O bond distances ranging from 2.07–2.24 Å. B is bonded in a distorted trigonal planar geometry to three O atoms. There is two shorter (1.45 Å) and one longer (1.47 Å) B–O bond length. There are seventeen inequivalent O sites. In the first O site, O is bonded to one Rb and five Mg atoms to form a mixture of corner and edge-sharing ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–7°. In the second O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with four ORbMg5 octahedra, corners with two equivalent OMg5 square pyramids, edges with ten OMg6 octahedra, and edges with two equivalent OMg5 square pyramids. The corner-sharing octahedra tilt angles range from 0–7°. In the third O site, O is bonded to five Mg atoms to form OMg5 square pyramids that share corners with three OMg5B octahedra, corners with two equivalent OMg5 square pyramids, and edges with eight OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. In the fourth O site, O is bonded to one Rb and five Mg atoms to form ORbMg5 octahedra that share corners with six ORbMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. In the fifth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with four ORbMg5 octahedra and edges with ten OMg6 octahedra. The corner-sharing octahedra tilt angles range from 5–6°. In the sixth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra, edges with ten OMg6 octahedra, and edges with two equivalent OMg5 square pyramids. The corner-sharing octahedra tilt angles range from 0–8°. In the seventh O site, O is bonded to five Mg and one B atom to form distorted OMg5B octahedra that share corners with four OMg6 octahedra, corners with three OMg5 square pyramids, and edges with eight OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the eighth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra, edges with eight ORbMg5 octahedra, and edges with two OMg5 square pyramids. The corner-sharing octahedra tilt angles range from 1–8°. In the ninth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra, edges with ten ORbMg5 octahedra, and an edgeedge with one OMg5 square pyramid. The corner-sharing octahedra tilt angles range from 1–7°. In the tenth O site, O is bonded to one Rb and five Mg atoms to form distorted ORbMg5 octahedra that share corners with four OMg6 octahedra, corners with two equivalent OMg5 square pyramids, and edges with nine ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. In the eleventh O site, O is bonded to five Mg atoms to form OMg5 square pyramids that share corners with five OMg5B octahedra, corners with two OMg5 square pyramids, and edges with eight OMg6 octahedra. The corner-sharing octahedra tilt angles range from 4–93°. In the twelfth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra and edges with eleven ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. In the thirteenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with four OMg6 octahedra, corners with two equivalent OMg5 square pyramids, edges with eleven OMg6 octahedra, and an edgeedge with one OMg5 square pyramid. The corner-sharing octahedra tilt angles range from 1–4°. In the fourteenth O site, O is bonded to one Rb and five Mg atoms to form ORbMg5 octahedra that share corners with four OMg6 octahedra, edges with ten ORbMg5 octahedra, and edges with two equivalent OMg5 square pyramids. The corner-sharing octahedra tilt angles range from 0–7°. In the fifteenth O site, O is bonded in a distorted single-bond geometry to four Mg and one B atom. In the sixteenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg6 octahedra and edges with twelve ORbMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–7°. In the seventeenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with four OMg6 octahedra, edges with ten OMg6 octahedra, and an edgeedge with one OMg5 square pyramid. The corner-sharing octahedra tilt angles range from 1–2°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb2FeCl5O by Materials Project

Rb2FeOCl5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Rb is bonded in a 10-coordinate geometry to ten Cl atoms. There are a spread of Rb–Cl bond distances ranging from 3.34–3.91 Å. Fe is bonded in a 6-coordinate geometry to one O and five Cl atoms. The Fe–O bond length is 1.98 Å. There are a spread of Fe–Cl bond distances ranging from 2.31–2.68 Å. O is bonded in a single-bond geometry to one Fe and one Cl atom. The O–Cl bond length is 2.39 Å. There are four inequivalent Cl sites. In the first Cl site, Cl is bonded in a 6-coordinate geometry to four equivalent Rb, one Fe, and one O atom. In the second Cl site, Cl is bonded in a distorted single-bond geometry to four equivalent Rb and one Fe atom. In the third Cl site, Cl is bonded in a distorted single-bond geometry to four equivalent Rb and one Fe atom. In the fourth Cl site, Cl is bonded in a distorted single-bond geometry to four equivalent Rb and one Fe atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb3Sb2I9 by Materials Project

Rb3Sb2I9 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are six inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.77–4.09 Å. In the second Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.78–4.26 Å. In the third Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.74–4.32 Å. In the fourth Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.79–4.14 Å. In the fifth Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.75–4.33 Å. In the sixth Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight I1- atoms. There are a spread of Rb–I bond distances ranging from 3.78–4.11 Å. There are four inequivalent Sb3+ sites. In the first Sb3+ site, Sb3+ is bonded to six I1- atoms to form corner-sharing SbI6 octahedra. The corner-sharing octahedra tilt angles range from 25–32°. There are a spread of Sb–I bond distances ranging from 2.90–3.24 Å. In the second Sb3+ site, Sb3+ is bonded to six I1- atoms to form corner-sharing SbI6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are a spread of Sb–I bond distances ranging from 2.91–3.26 Å. In the third Sb3+ site, Sb3+ is bonded to six I1- atoms to form corner-sharing SbI6 octahedra. The corner-sharing octahedra tilt angles range from 28–32°. There are a spread of Sb–I bond distances ranging from 2.90–3.25 Å. In the fourth Sb3+ site, Sb3+ is bonded to six I1- atoms to form corner-sharing SbI6 octahedra. The corner-sharing octahedra tilt angles range from 25–28°. There are a spread of Sb–I bond distances ranging from 2.91–3.26 Å. There are eighteen inequivalent I1- sites. In the first I1- site, I1- is bonded to three Rb1+ and two Sb3+ atoms to form distorted IRb3Sb2 trigonal bipyramids that share a cornercorner with one IRb2Sb2 tetrahedra, corners with two IRb3Sb2 trigonal bipyramids, edges with two equivalent IRb3Sb2 square pyramids, and an edgeedge with one IRb2Sb2 tetrahedra. In the second I1- site, I1- is bonded to three Rb1+ and two Sb3+ atoms to form distorted IRb3Sb2 trigonal bipyramids that share a cornercorner with one IRb3Sb2 square pyramid, a cornercorner with one IRb3Sb2 trigonal bipyramid, an edgeedge with one IRb2Sb2 tetrahedra, and edges with two equivalent IRb3Sb2 trigonal bipyramids. In the third I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom. In the fourth I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom. In the fifth I1- site, I1- is bonded in a distorted trigonal non-coplanar geometry to two Rb1+ and one Sb3+ atom. In the sixth I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom. In the seventh I1- site, I1- is bonded in a distorted trigonal non-coplanar geometry to two Rb1+ and one Sb3+ atom. In the eighth I1- site, I1- is bonded in a distorted see-saw-like geometry to three Rb1+ and one Sb3+ atom. In the ninth I1- site, I1- is bonded in a distorted square co-planar geometry to two Rb1+ and two Sb3+ atoms. In the tenth I1- site, I1- is bonded to two Rb1+ and two Sb3+ atoms to form a mixture of distorted edge and corner-sharing IRb2Sb2 tetrahedra. In the eleventh I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom. In the twelfth I1- site, I1- is bonded in a distorted trigonal non-coplanar geometry to two Rb1+ and one Sb3+ atom. In the thirteenth I1- site, I1- is bonded to three Rb1+ and two Sb3+ atoms to form distorted IRb3Sb2 trigonal bipyramids that share a cornercorner with one IRb3Sb2 square pyramid, corners with two equivalent IRb2Sb2 tetrahedra, a cornercorner with one IRb3Sb2 trigonal bipyramid, and edges with two equivalent IRb3Sb2 trigonal bipyramids. In the fourteenth I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom. In the fifteenth I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom. In the sixteenth I1- site, I1- is bonded to three Rb1+ and two Sb3+ atoms to form distorted IRb3Sb2 square pyramids that share corners with two IRb3Sb2 trigonal bipyramids, an edgeedge with one IRb2Sb2 tetrahedra, and edges with two equivalent IRb3Sb2 trigonal bipyramids. In the seventeenth I1- site, I1- is bonded in a distorted trigonal non-coplanar geometry to two Rb1+ and one Sb3+ atom. In the eighteenth I1- site, I1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbBi by Materials Project

BiRb is Protactinium-derived structured and crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. Rb is bonded in a 10-coordinate geometry to two equivalent Rb and eight equivalent Bi atoms. Both Rb–Rb bond lengths are 3.34 Å. There are a spread of Rb–Bi bond distances ranging from 3.88–3.92 Å. Bi is bonded in a 10-coordinate geometry to eight equivalent Rb and two equivalent Bi atoms. Both Bi–Bi bond lengths are 3.34 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbCoCl3O2 by Materials Project

RbCoO2Cl3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Rb is bonded in a distorted q6 geometry to two equivalent O and eight Cl atoms. Both Rb–O bond lengths are 3.23 Å. There are a spread of Rb–Cl bond distances ranging from 3.36–3.72 Å. Co is bonded to two equivalent O and four Cl atoms to form distorted corner-sharing CoCl4O2 octahedra. The corner-sharing octahedral tilt angles are 57°. Both Co–O bond lengths are 1.67 Å. There are two shorter (2.31 Å) and two longer (2.43 Å) Co–Cl bond lengths. O is bonded in a single-bond geometry to one Rb and one Co atom. There are two inequivalent Cl sites. In the first Cl site, Cl is bonded in a distorted see-saw-like geometry to two equivalent Rb and two equivalent Co atoms. In the second Cl site, Cl is bonded in a 1-coordinate geometry to three equivalent Rb and one Co atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

The Sporadic History of Rubidium and its Role in Corrosion of Steel Related to Nuclear Material Storage

The influence of rubidium (Rb), both in its metallic and oxidized states, on the corrosion resistance of steels has direct relevance to the storage of radioactive Kr-85 containing nuclear materials. Kr-85 undergoes a ß-decay to generate stable, metallic Rb. The literature to date is sparse, contained primarily in company reports and divisive as to whether Rb metal, or its oxides, can lead to corrosion of steel materials. In both the direct storage of Kr-85 and used nuclear fuel that will contain Kr-85, if Rb is corrosive then continual decay of the Kr-85 will generate an increasingly corrosive environment for the steel canister it is stored in. This review was written to consolidate the known data to date on Rb corrosion of steels to identify consistencies, contradictions and remaining gaps in our understanding of the Rb : steel system.

krypton, corrosion, steel, Rubidium↗
DOE OSTI2025

Assessing the Impact of Large Removable Beryllium Reflector Experiments on HFIR Performance and Safety Metrics

This study investigated the effect of various removable beryllium (RB) experiment configurations on High Flux Isotope Reactor (HFIR) metrics to address increasing interest in these facilities for materials and fuels irradiation research. The RB reflector contains eight large and four small irradiation experiment facilities that offer excellent neutron flux conditions to perform fission and fusion reactor materials and fuels irradiation research. This work aims to outline acceptable RB configurations based on safety, performance, and programmatic metrics. This study assessed experiment effects on reactivity, cycle length, fission rate density distributions, and neutron flux distributions using the Shift, HFIRCON, and SCALE ORIGEN codes. Initial evaluations focused on generic experiment materials including aluminum plugs, stainless steel plugs, molybdenum plugs, and aluminum plugs with gadolinium shields. Subsequent analyses of MiniFuel experiments were performed to evaluate a heterogenous experiment, consisting of a more complex geometry and bearing several materials, and to test the correlations developed with the generic materials on a real experiment. Furthermore, the effects of neutron poison concentrations in the standard beryllium plugs were evaluated. When assuming a reference RB configuration with eight large fresh beryllium plugs, perturbed configurations with three aluminum plugs, one stainless steel plug, one molybdenum plug, one gadolinium-shielded aluminum plug, and one MiniFuel experiment resulted in a cycle length reduction of less than 1.3 days, the current threshold before requiring additional approvals. Configurations with five aluminum plugs, one stainless steel plug, one molybdenum plug, one gadolinium-shielded aluminum plug, and two MiniFuel experiments meet the 1.3 day limit if irradiated beryllium plugs are considered. Fuel element fission rate density distributions remained within safety limits, with maximum local increases under 9%. Neutron flux calculations revealed large thermal flux depressions inside and around the perturbed RB facilities, while epithermal and fast neutron fluxes increased because of reduced neutron moderation by the perturbed materials. These findings provide valuable guidance for optimizing RB configurations to balance safety and performance at HFIR.

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS↗
DOE OSTI2022

Rice Bran Stabilisation and Oil Extraction Using the Microwave-Assisted Method and Its Effects on GABA and Gamma-Oryzanol Compounds

Rice bran oil (RBO) is a valuable ingredient extracted from rice bran (RB), a side stream of polishing rice grain in the milling process. RBO is rich in bioactive ingredients with potential health benefits, such as gamma-oryzanol (GO) and gamma-aminobutyric acid (GABA). Despite its benefits, the quality of RBO depends on the degree of stabilisation of the RB, which is easily affected by lipase enzymes, and thus needs an effective treatment prior to RBO production. To assess the potential of the microwave-assisted method for RB stabilisation and RBO extraction, three Carolino rice varieties (Ariete, Teti, Luna) were tested. The effect of RB stabilisation was evaluated via acid value, water absorption, and GO and GABA levels. The RBO yield was optimised by solvent, temperature, and solvent-to-sample ratio, and the GO and fatty acid levels were determined. The RB stabilisation for the Luna variety did not affect the GO and GABA; for the Ariete and Teti varieties, the GO decreased by 34.4% and 24.2%, and the GABA increased by 26.5% and 47.0%, respectively. The GO levels in RBO samples were not affected by RB stabilisation. The RBO nutritional value was confirmed by the suitable ratio (>2) between polyunsaturated (PUFA) and saturated fatty acids (SFA), with the Teti variety presenting the highest ratio.

Reis, Núria (ORCID:0000000194339109)↗
DOE OSTI2023

An Immunomodulatory Polysaccharide–Protein Complex Isolated from the Polypore Fungus Royoporus badius

Many wild edible polypore mushrooms have medicinal value. In this study, we investigate the potential medicinal properties of the wild polypore mushroom Royoporus badius collected from north-central British Columbia, Canada. Water extract from R. badius was found to exhibit potent immunomodulatory activity. The extract was purified using DEAE-Sephadex anion-exchange chromatography as well as Sephacryl S-500 and HPLC BioSEC5 size-exclusion chromatography, to yield a novel polysaccharide-protein complex (IMPP-Rb).IMPP-Rb has a peak maxima molecular weight (M p ) of 950 kDa. GC-MS analyses showed that IMPP-Rb is composed predominantly of glucose (49.2%), galactose (11.3%), mannose (10.8%), rhamnose (9.6%), and galacturonic acid (8.2%), with smaller amounts of xylose (5.2%), fucose (2.8%), N-acetyl glucosamine (1.8%), and arabinose (1.2%). IMPP-Rb has multiple linkages, with 4-Glcp, 4-Manp, 6-Manp, 3,4-Manp, 4-Xylp, and 2-Rhap being the most prominent. IMPP-Rb is capable of inducing many cytokines in vitro and the protein component is indispensable for its immunomodulatory activity. IMPP-Rb has potential application as an immuno-stimulatory agent with pharmaceutical value.

59 BASIC BIOLOGICAL SCIENCES↗
NASA NTRS1977

On the age of KREEP

It is noted that the variable Rb-Sr model ages of lunar highland rocks containing a significant amount of KREEP basalt may be best explained by some fractionation of Rb from Sr during metamorphism 3.9 billion years ago, but the uniformity of the KREEP-type trace-element pattern in different highland samples indicates that elements such as the rare earth were hardly fractionated at all during the metamorphic event. Data are presented which show that the Rb/Sr fractionation 3.9 billion years ago was due to Rb mobilization alone in most cases and that this fractionation can be accounted for by coupling of Rb to other, less volatile incompatible elements. Variations of Rb in lunar highland rocks are analyzed, a correction method is applied for the Rb/Sr fractionation, and results are evaluated separately for Apollo 16 VHA and KREEP basalts, Apollo 17 noritic breccias, Apollo 14 KREEP breccias, Apollo 15 KREEP basalts, and Apollo 15-KREEP-enriched breccias. Evidence for volatilization of alkalis from glasses of impact origin is summarized, and an apparent correlation is discussed between meteoritic component (as given by the Ir/Au ratio) and rock type (as given by the U or Rb content) for many lunar highland samples.

Palme, H.↗