Materials Data on K2Si4SbO11 by Materials Project
K2Si4SbO11 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 7-coordinate geometry to nine O atoms. There are a spread of K–O bond distances ranging from 2.60–3.39 Å. In the second K site, K is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of K–O bond distances ranging from 2.73–3.39 Å. There are four inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SbO5 square pyramid and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SbO5 square pyramid and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SbO5 square pyramid and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SbO5 square pyramid and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. Sb is bonded to five O atoms to form SbO5 square pyramids that share corners with four SiO4 tetrahedra. There are a spread of Sb–O bond distances ranging from 1.87–2.16 Å. There are eleven inequivalent O sites. In the first O site, O is bonded in a distorted bent 150 degrees geometry to one K and two Si atoms. In the second O site, O is bonded in a 1-coordinate geometry to two equivalent K, one Si, and one Sb atom. In the third O site, O is bonded in a 1-coordinate geometry to two K, one Si, and one Sb atom. In the fourth O site, O is bonded in a 1-coordinate geometry to three K and one Sb atom. In the fifth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the sixth O site, O is bonded in a 1-coordinate geometry to two equivalent K, one Si, and one Sb atom. In the seventh O site, O is bonded in a 2-coordinate geometry to two equivalent K and two Si atoms. In the eighth O site, O is bonded in a distorted bent 150 degrees geometry to one K and two Si atoms. In the ninth O site, O is bonded in a bent 150 degrees geometry to one K and two Si atoms. In the tenth O site, O is bonded in a 1-coordinate geometry to three K, one Si, and one Sb atom. In the eleventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms.