Materials Data on SrAl4 by Materials Project
Al4Sr crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sr is bonded in a 8-coordinate geometry to sixteen Al atoms. There are eight shorter (3.42 Å) and eight longer (3.59 Å) Sr–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 12-coordinate geometry to four equivalent Sr and four equivalent Al atoms. All Al–Al bond lengths are 2.69 Å. In the second Al site, Al is bonded in a 9-coordinate geometry to four equivalent Sr and five Al atoms. The Al–Al bond length is 2.62 Å.
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