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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Rb2CoBr4 by Materials Project

Rb2CoBr4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are a spread of Rb–Br bond distances ranging from 3.55–3.92 Å. In the second Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to nine Br1- atoms. There are a spread of Rb–Br bond distances ranging from 3.50–4.05 Å. Co2+ is bonded in a tetrahedral geometry to four Br1- atoms. There are three shorter (2.39 Å) and one longer (2.41 Å) Co–Br bond lengths. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to four Rb1+ and one Co2+ atom. In the second Br1- site, Br1- is bonded in a 1-coordinate geometry to four Rb1+ and one Co2+ atom. In the third Br1- site, Br1- is bonded in a 1-coordinate geometry to five Rb1+ and one Co2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbCoBr3 by Materials Project

RbCoBr3 crystallizes in the trigonal P3c1 space group. The structure is three-dimensional. Rb1+ is bonded to twelve Br1- atoms to form RbBr12 cuboctahedra that share corners with six equivalent RbBr12 cuboctahedra, corners with six CoBr6 octahedra, faces with eight equivalent RbBr12 cuboctahedra, and faces with six CoBr6 octahedra. The corner-sharing octahedra tilt angles range from 15–19°. There are a spread of Rb–Br bond distances ranging from 3.69–4.02 Å. There are three inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. There are three shorter (2.57 Å) and three longer (2.59 Å) Co–Br bond lengths. In the second Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. All Co–Br bond lengths are 2.58 Å. In the third Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. There are three shorter (2.57 Å) and three longer (2.58 Å) Co–Br bond lengths. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms. In the second Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms. In the third Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbCoBr3 by Materials Project

RbCoBr3 crystallizes in the hexagonal P6_3cm space group. The structure is three-dimensional. Rb1+ is bonded to twelve Br1- atoms to form RbBr12 cuboctahedra that share corners with six equivalent RbBr12 cuboctahedra, corners with six CoBr6 octahedra, faces with eight equivalent RbBr12 cuboctahedra, and faces with six CoBr6 octahedra. The corner-sharing octahedra tilt angles range from 14–18°. There are a spread of Rb–Br bond distances ranging from 3.70–4.05 Å. There are two inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. There are three shorter (2.57 Å) and three longer (2.59 Å) Co–Br bond lengths. In the second Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. All Co–Br bond lengths are 2.58 Å. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms. In the second Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbCoBr3 by Materials Project

RbCoBr3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Rb1+ is bonded to twelve equivalent Br1- atoms to form RbBr12 cuboctahedra that share corners with six equivalent RbBr12 cuboctahedra, corners with six equivalent CoBr6 octahedra, faces with eight equivalent RbBr12 cuboctahedra, and faces with six equivalent CoBr6 octahedra. The corner-sharing octahedral tilt angles are 17°. There are six shorter (3.75 Å) and six longer (3.84 Å) Rb–Br bond lengths. Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. All Co–Br bond lengths are 2.59 Å. Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbCoBr3 by Materials Project

RbCoBr3 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. Rb1+ is bonded to twelve Br1- atoms to form RbBr12 cuboctahedra that share corners with six equivalent RbBr12 cuboctahedra, corners with six CoBr6 octahedra, faces with eight equivalent RbBr12 cuboctahedra, and faces with six CoBr6 octahedra. The corner-sharing octahedra tilt angles range from 14–18°. There are a spread of Rb–Br bond distances ranging from 3.71–4.03 Å. There are two inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. There are three shorter (2.57 Å) and three longer (2.58 Å) Co–Br bond lengths. In the second Co2+ site, Co2+ is bonded to six equivalent Br1- atoms to form CoBr6 octahedra that share corners with six equivalent RbBr12 cuboctahedra, faces with six equivalent RbBr12 cuboctahedra, and faces with two equivalent CoBr6 octahedra. All Co–Br bond lengths are 2.57 Å. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms. In the second Br1- site, Br1- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Co2+ atoms.

36 MATERIALS SCIENCE↗