Materials Data on Al7Te10 by Materials Project
Al7Te10 crystallizes in the trigonal R32 space group. The structure is three-dimensional. there are three inequivalent Al sites. In the first Al site, Al is bonded to four Te atoms to form corner-sharing AlTe4 tetrahedra. There are a spread of Al–Te bond distances ranging from 2.60–2.71 Å. In the second Al site, Al is bonded to four Te atoms to form a mixture of edge and corner-sharing AlTe4 tetrahedra. There are a spread of Al–Te bond distances ranging from 2.57–2.70 Å. In the third Al site, Al is bonded to one Al and three equivalent Te atoms to form distorted corner-sharing AlAlTe3 tetrahedra. The Al–Al bond length is 2.62 Å. All Al–Te bond lengths are 2.70 Å. There are five inequivalent Te sites. In the first Te site, Te is bonded in a distorted T-shaped geometry to three Al atoms. In the second Te site, Te is bonded in a trigonal non-coplanar geometry to three Al atoms. In the third Te site, Te is bonded in a water-like geometry to two equivalent Al atoms. In the fourth Te site, Te is bonded in an L-shaped geometry to two equivalent Al atoms. In the fifth Te site, Te is bonded in a trigonal non-coplanar geometry to three equivalent Al atoms.