Materials Data on Ba8CuSi16 by Materials Project

Ba8CuSi16 is Magnesium tetraboride-derived structured and crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are eight inequivalent Ba sites. In the first Ba site, Ba is bonded in a 9-coordinate geometry to nine Si atoms. There are a spread of Ba–Si bond distances ranging from 3.43–3.64 Å. In the second Ba site, Ba is bonded in a 9-coordinate geometry to nine Si atoms. There are a spread of Ba–Si bond distances ranging from 3.40–3.64 Å. In the third Ba site, Ba is bonded in a 11-coordinate geometry to two equivalent Cu and nine Si atoms. Both Ba–Cu bond lengths are 3.49 Å. There are a spread of Ba–Si bond distances ranging from 3.41–3.68 Å. In the fourth Ba site, Ba is bonded in a 9-coordinate geometry to nine Si atoms. There are a spread of Ba–Si bond distances ranging from 3.42–3.64 Å. In the fifth Ba site, Ba is bonded in a 1-coordinate geometry to one Cu and ten Si atoms. The Ba–Cu bond length is 3.14 Å. There are a spread of Ba–Si bond distances ranging from 3.45–3.86 Å. In the sixth Ba site, Ba is bonded in a 11-coordinate geometry to eleven Si atoms. There are a spread of Ba–Si bond distances ranging from 3.47–3.99 Å. In the seventh Ba site, Ba is bonded in a 11-coordinate geometry to eleven Si atoms. There are a spread of Ba–Si bond distances ranging from 3.45–3.98 Å. In the eighth Ba site, Ba is bonded in a 1-coordinate geometry to one Cu and ten Si atoms. The Ba–Cu bond length is 3.13 Å. There are a spread of Ba–Si bond distances ranging from 3.32–3.79 Å. Cu is bonded to four Ba and three Si atoms to form distorted corner-sharing CuBa4Si3 pentagonal bipyramids. There are one shorter (2.25 Å) and two longer (2.33 Å) Cu–Si bond lengths. There are twelve inequivalent Si sites. In the first Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. There are two shorter (2.41 Å) and one longer (2.48 Å) Si–Si bond lengths. In the second Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. There are two shorter (2.43 Å) and one longer (2.44 Å) Si–Si bond lengths. In the third Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. There are two shorter (2.43 Å) and one longer (2.45 Å) Si–Si bond lengths. In the fourth Si site, Si is bonded in a 2-coordinate geometry to three Ba, one Cu, and three Si atoms. There are one shorter (2.39 Å) and two longer (2.41 Å) Si–Si bond lengths. In the fifth Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. Both Si–Si bond lengths are 2.40 Å. In the sixth Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. Both Si–Si bond lengths are 2.41 Å. In the seventh Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. Both Si–Si bond lengths are 2.41 Å. In the eighth Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. Both Si–Si bond lengths are 2.43 Å. In the ninth Si site, Si is bonded in a 6-coordinate geometry to five Ba, one Cu, and three Si atoms. The Si–Si bond length is 2.66 Å. In the tenth Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. The Si–Si bond length is 2.41 Å. In the eleventh Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. The Si–Si bond length is 2.41 Å. In the twelfth Si site, Si is bonded in a 8-coordinate geometry to five Ba and three Si atoms. The Si–Si bond length is 2.45 Å.