Materials Data on SrGa4O7 by Materials Project
SrGa4O7 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Sr2+ is bonded in a 5-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.51–3.01 Å. There are two inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There are a spread of Ga–O bond distances ranging from 1.84–1.90 Å. In the second Ga3+ site, Ga3+ is bonded to four O2- atoms to form corner-sharing GaO4 tetrahedra. There are a spread of Ga–O bond distances ranging from 1.82–1.91 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to one Sr2+ and two equivalent Ga3+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Sr2+ and two Ga3+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Sr2+ and two equivalent Ga3+ atoms. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to three Ga3+ atoms.