Materials Data on Mg2Sb3 by Materials Project
Mg2Sb3 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Mg2+ is bonded in a 7-coordinate geometry to seven Sb+1.33- atoms. There are a spread of Mg–Sb bond distances ranging from 2.98–3.32 Å. There are two inequivalent Sb+1.33- sites. In the first Sb+1.33- site, Sb+1.33- is bonded in a 4-coordinate geometry to four equivalent Mg2+ and three equivalent Sb+1.33- atoms. All Sb–Sb bond lengths are 2.97 Å. In the second Sb+1.33- site, Sb+1.33- is bonded to six equivalent Mg2+ atoms to form distorted edge-sharing SbMg6 octahedra.
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