Materials Data on Sr4Al6SeO12 by Materials Project
Sr4Al6SeO12 crystallizes in the cubic I-43m space group. The structure is three-dimensional. Sr2+ is bonded in a 7-coordinate geometry to one Se2- and six equivalent O2- atoms. The Sr–Se bond length is 3.11 Å. There are three shorter (2.50 Å) and three longer (3.04 Å) Sr–O bond lengths. Al3+ is bonded to four equivalent O2- atoms to form corner-sharing AlO4 tetrahedra. All Al–O bond lengths are 1.76 Å. Se2- is bonded in a tetrahedral geometry to four equivalent Sr2+ atoms. O2- is bonded in a 2-coordinate geometry to two equivalent Sr2+ and two equivalent Al3+ atoms.
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