Materials Data on K8Sb2Te by Materials Project
K8Sb2Te crystallizes in the tetragonal I-4m2 space group. The structure is three-dimensional. K1+ is bonded in a trigonal non-coplanar geometry to two Sb3- and one Te2- atom. Both K–Sb bond lengths are 3.56 Å. The K–Te bond length is 3.59 Å. There are four inequivalent Sb3- sites. In the first Sb3- site, Sb3- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. In the second Sb3- site, Sb3- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. In the third Sb3- site, Sb3- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. All Sb–K bond lengths are 3.56 Å. In the fourth Sb3- site, Sb3- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. All Sb–K bond lengths are 3.56 Å. There are two inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. In the second Te2- site, Te2- is bonded in a body-centered cubic geometry to eight equivalent K1+ atoms. All Te–K bond lengths are 3.59 Å.