Materials Data on CaBi6(PO5)4 by Materials Project
CaBi6(PO5)4 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Ca2+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.42–2.70 Å. There are three inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Bi–O bond distances ranging from 2.14–2.42 Å. In the second Bi3+ site, Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.22–2.73 Å. In the third Bi3+ site, Bi3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Bi–O bond distances ranging from 2.27–2.78 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.55 Å) and two longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.55 Å) and three longer (1.56 Å) P–O bond length. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded to four Bi3+ atoms to form distorted OBi4 tetrahedra that share a cornercorner with one OCaBi3 tetrahedra and edges with two OBi4 tetrahedra. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Bi3+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Ca2+, one Bi3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Bi3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two Bi3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one Ca2+, one Bi3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Bi3+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to two Bi3+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to one Ca2+, one Bi3+, and one P5+ atom. In the tenth O2- site, O2- is bonded to one Ca2+ and three Bi3+ atoms to form a mixture of distorted corner and edge-sharing OCaBi3 tetrahedra.