Materials Data on Al3Tc2 by Materials Project
Tc2Al3 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Tc is bonded in a 5-coordinate geometry to three equivalent Tc and eight Al atoms. All Tc–Tc bond lengths are 2.73 Å. There are a spread of Tc–Al bond distances ranging from 2.54–2.92 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded in a hexagonal planar geometry to six equivalent Tc atoms. In the second Al site, Al is bonded in a 2-coordinate geometry to five equivalent Tc and three equivalent Al atoms. All Al–Al bond lengths are 2.75 Å.
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