DOI: 10.17188/1263361
title: Materials Data on K2Ba3Sb4 by Materials Project

description: K2Ba3Sb4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are sixteen inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.56–3.72 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to six Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.43–4.05 Å. In the third K1+ site, K1+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.64–3.99 Å. In the fourth K1+ site, K1+ is bonded in a distorted rectangular see-saw-like geometry to four Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.54–3.71 Å. In the fifth K1+ site, K1+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.63–4.06 Å. In the sixth K1+ site, K1+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.49–4.10 Å. In the seventh K1+ site, K1+ is bonded to five Sb2- atoms to form KSb5 trigonal bipyramids that share corners with two equivalent BaSb5 trigonal bipyramids, an edgeedge with one BaSb5 square pyramid, and an edgeedge with one BaSb5 trigonal bipyramid. There are a spread of K–Sb bond distances ranging from 3.52–3.92 Å. In the eighth K1+ site, K1+ is bonded in a 4-coordinate geometry to four Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.49–4.02 Å. In the ninth K1+ site, K1+ is bonded in a distorted see-saw-like geometry to four Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.52–3.87 Å. In the tenth K1+ site, K1+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.53–3.88 Å. In the eleventh K1+ site, K1+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.59–3.88 Å. In the twelfth K1+ site, K1+ is bonded in a 4-coordinate geometry to four Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.55–3.68 Å. In the thirteenth K1+ site, K1+ is bonded in a 1-coordinate geometry to six Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.40–4.02 Å. In the fourteenth K1+ site, K1+ is bonded to five Sb2- atoms to form distorted KSb5 square pyramids that share a cornercorner with one BaSb6 octahedra, an edgeedge with one BaSb6 octahedra, and a faceface with one BaSb5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 38°. There are a spread of K–Sb bond distances ranging from 3.58–3.91 Å. In the fifteenth K1+ site, K1+ is bonded in a 4-coordinate geometry to four Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.53–3.79 Å. In the sixteenth K1+ site, K1+ is bonded in a 3-coordinate geometry to four Sb2- atoms. There are a spread of K–Sb bond distances ranging from 3.54–4.01 Å. There are twenty-four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.43–3.61 Å. In the second Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.41–3.64 Å. In the third Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form distorted BaSb5 square pyramids that share corners with two equivalent BaSb6 octahedra and an edgeedge with one KSb5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 26–50°. There are a spread of Ba–Sb bond distances ranging from 3.38–3.82 Å. In the fourth Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form a mixture of distorted edge and corner-sharing BaSb5 trigonal bipyramids. There are a spread of Ba–Sb bond distances ranging from 3.47–3.76 Å. In the fifth Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.54–3.65 Å. In the sixth Ba2+ site, Ba2+ is bonded to six Sb2- atoms to form distorted BaSb6 octahedra that share a cornercorner with one KSb5 square pyramid, corners with two equivalent BaSb5 square pyramids, corners with two equivalent BaSb5 trigonal bipyramids, and an edgeedge with one KSb5 square pyramid. There are a spread of Ba–Sb bond distances ranging from 3.51–3.90 Å. In the seventh Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.49–3.71 Å. In the eighth Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form a mixture of distorted face, edge, and corner-sharing BaSb5 trigonal bipyramids. There are a spread of Ba–Sb bond distances ranging from 3.44–3.57 Å. In the ninth Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form distorted BaSb5 trigonal bipyramids that share corners with two equivalent KSb5 trigonal bipyramids, corners with two BaSb5 trigonal bipyramids, an edgeedge with one BaSb5 trigonal bipyramid, and a faceface with one BaSb5 trigonal bipyramid. There are a spread of Ba–Sb bond distances ranging from 3.44–3.56 Å. In the tenth Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.39–3.69 Å. In the eleventh Ba2+ site, Ba2+ is bonded in a 4-coordinate geometry to four Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.40–3.72 Å. In the twelfth Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.42–3.99 Å. In the thirteenth Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.53–4.03 Å. In the fourteenth Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.51–3.76 Å. In the fifteenth Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.48–3.88 Å. In the sixteenth Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.55–3.66 Å. In the seventeenth Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form a mixture of distorted edge and corner-sharing BaSb5 trigonal bipyramids. There are a spread of Ba–Sb bond distances ranging from 3.39–3.97 Å. In the eighteenth Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.37–4.05 Å. In the nineteenth Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form distorted BaSb5 trigonal bipyramids that share corners with two equivalent BaSb6 octahedra and a faceface with one KSb5 square pyramid. The corner-sharing octahedra tilt angles range from 36–48°. There are a spread of Ba–Sb bond distances ranging from 3.38–3.92 Å. In the twentieth Ba2+ site, Ba2+ is bonded to five Sb2- atoms to form distorted BaSb5 trigonal bipyramids that share corners with three BaSb5 trigonal bipyramids, an edgeedge with one KSb5 trigonal bipyramid, and edges with two BaSb5 trigonal bipyramids. There are a spread of Ba–Sb bond distances ranging from 3.40–3.99 Å. In the twenty-first Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.38–3.83 Å. In the twenty-second Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.49–3.75 Å. In the twenty-third Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.49–3.67 Å. In the twenty-fourth Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to five Sb2- atoms. There are a spread of Ba–Sb bond distances ranging from 3.52–3.65 Å. There are thirty-two inequivalent Sb2- sites. In the first Sb2- site, Sb2- is bonded in a 7-coordinate geometry to one K1+ and six Ba2+ atoms. In the second Sb2- site, Sb2- is bonded in a 7-coordinate geometry to one K1+ and six Ba2+ atoms. In the third Sb2- site, Sb2- is bonded in a 7-coordinate geometry to three K1+, three Ba2+, and one Sb2- atom. The Sb–Sb bond length is 2.98 Å. In the fourth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to three K1+, three Ba2+, and one Sb2- atom. The Sb–Sb bond length is 2.96 Å. In the fifth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. The Sb–Sb bond length is 3.05 Å. In the sixth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to three K1+, three Ba2+, and one Sb2- atom. The Sb–Sb bond length is 3.02 Å. In the seventh Sb2- site, Sb2- is bonded in a 8-coordinate geometry to two K1+, four Ba2+, and two Sb2- atoms. There are one shorter (2.98 Å) and one longer (3.00 Å) Sb–Sb bond lengths. In the eighth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. The Sb–Sb bond length is 2.95 Å. In the ninth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to four K1+, two Ba2+, and two Sb2- atoms. In the tenth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to four K1+, two Ba2+, and two Sb2- atoms. In the eleventh Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. The Sb–Sb bond length is 2.95 Å. In the twelfth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the thirteenth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the fourteenth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to three K1+, four Ba2+, and one Sb2- atom. In the fifteenth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to five K1+ and three Ba2+ atoms. In the sixteenth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to four K1+ and four Ba2+ atoms. In the seventeenth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to two K1+ and six Ba2+ atoms. In the eighteenth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to three K1+ and five Ba2+ atoms. In the nineteenth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to one K1+, five Ba2+, and one Sb2- atom. The Sb–Sb bond length is 2.98 Å. In the twentieth Sb2- site, Sb2- is bonded in a distorted pentagonal bipyramidal geometry to two K1+ and five Ba2+ atoms. In the twenty-first Sb2- site, Sb2- is bonded in a 7-coordinate geometry to one K1+, five Ba2+, and one Sb2- atom. The Sb–Sb bond length is 3.06 Å. In the twenty-second Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the twenty-third Sb2- site, Sb2- is bonded in a 8-coordinate geometry to two K1+, four Ba2+, and two Sb2- atoms. Both Sb–Sb bond lengths are 2.95 Å. In the twenty-fourth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to three K1+, three Ba2+, and two Sb2- atoms. There are one shorter (2.96 Å) and one longer (2.99 Å) Sb–Sb bond lengths. In the twenty-fifth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to three K1+, three Ba2+, and two Sb2- atoms. The Sb–Sb bond length is 2.96 Å. In the twenty-sixth Sb2- site, Sb2- is bonded in a 8-coordinate geometry to two K1+, four Ba2+, and two Sb2- atoms. The Sb–Sb bond length is 2.97 Å. In the twenty-seventh Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the twenty-eighth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the twenty-ninth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the thirtieth Sb2- site, Sb2- is bonded in a 7-coordinate geometry to two K1+, four Ba2+, and one Sb2- atom. In the thirty-first Sb2- site, Sb2- is bonded in a 7-coordinate geometry to three K1+, three Ba2+, and one Sb2- atom. In the thirty-second Sb