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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on K2Re by Materials Project

K2Re crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are four inequivalent K sites. In the first K site, K is bonded in a 5-coordinate geometry to five Re atoms. There are four shorter (3.75 Å) and one longer (3.87 Å) K–Re bond lengths. In the second K site, K is bonded in a 5-coordinate geometry to five Re atoms. There are a spread of K–Re bond distances ranging from 3.73–3.93 Å. In the third K site, K is bonded to four Re atoms to form a mixture of distorted corner and edge-sharing KRe4 tetrahedra. There are two shorter (3.44 Å) and two longer (3.56 Å) K–Re bond lengths. In the fourth K site, K is bonded to four Re atoms to form a mixture of distorted corner and edge-sharing KRe4 tetrahedra. There are a spread of K–Re bond distances ranging from 3.44–3.58 Å. There are two inequivalent Re sites. In the first Re site, Re is bonded in a 9-coordinate geometry to nine K atoms. In the second Re site, Re is bonded in a 9-coordinate geometry to nine K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Re by Materials Project

K3Re is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded to four equivalent K and four equivalent Re atoms to form a mixture of distorted edge, face, and corner-sharing KK4Re4 tetrahedra. All K–K bond lengths are 3.82 Å. All K–Re bond lengths are 3.82 Å. In the second K site, K is bonded in a body-centered cubic geometry to eight equivalent K atoms. Re is bonded in a body-centered cubic geometry to eight equivalent K atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Re by Materials Project

K3Re is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 12-coordinate geometry to four equivalent K and four equivalent Re atoms. All K–K bond lengths are 3.87 Å. All K–Re bond lengths are 3.87 Å. In the second K site, K is bonded to eight equivalent K and four equivalent Re atoms to form distorted KK8Re4 cuboctahedra that share corners with four equivalent KK8Re4 cuboctahedra, corners with eight equivalent ReK12 cuboctahedra, edges with eight equivalent KK8Re4 cuboctahedra, faces with four equivalent KK8Re4 cuboctahedra, and faces with six equivalent ReK12 cuboctahedra. All K–Re bond lengths are 4.04 Å. Re is bonded to twelve K atoms to form ReK12 cuboctahedra that share corners with four equivalent ReK12 cuboctahedra, corners with eight equivalent KK8Re4 cuboctahedra, edges with eight equivalent ReK12 cuboctahedra, faces with four equivalent ReK12 cuboctahedra, and faces with six equivalent KK8Re4 cuboctahedra.

36 MATERIALS SCIENCE↗