Materials Data on Ba2CaV2(P2O9)2 by Materials Project
Ba2CaV2(P2O9)2 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.65–3.22 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–3.16 Å. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.40–2.69 Å. There are two inequivalent V5+ sites. In the first V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.64–1.93 Å. In the second V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.60–1.95 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.51–1.60 Å. In the second P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.52–1.63 Å. In the third P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.51–1.60 Å. In the fourth P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. There are eighteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Ca2+, one V5+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ba2+, one V5+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one Ba2+, one V5+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one V5+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Ca2+, one V5+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to two Ba2+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one V5+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to one V5+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to one Ca2+ and one V5+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, one Ca2+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, one Ca2+, and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+ and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a distorted water-like geometry to one Ba2+, one Ca2+, one V5+, and one P5+ atom. In the seventeenth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Ca2+, and one P5+ atom.