Materials Data on Sr2As by Materials Project
Sr2As crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Sr sites. In the first Sr site, Sr is bonded in a 5-coordinate geometry to five equivalent As atoms. There are one shorter (3.14 Å) and four longer (3.53 Å) Sr–As bond lengths. In the second Sr site, Sr is bonded in a distorted square co-planar geometry to four equivalent As atoms. All Sr–As bond lengths are 3.32 Å. As is bonded in a 9-coordinate geometry to nine Sr atoms.
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