Materials Data on Sm2Te5 by Materials Project
Sm2Te5 crystallizes in the orthorhombic Cmcm space group. The structure is two-dimensional and consists of two Sm2Te5 sheets oriented in the (0, 1, 0) direction. there are two inequivalent Sm2+ sites. In the first Sm2+ site, Sm2+ is bonded in a 9-coordinate geometry to nine Te+0.80- atoms. There are a spread of Sm–Te bond distances ranging from 3.27–3.33 Å. In the second Sm2+ site, Sm2+ is bonded in a 9-coordinate geometry to nine Te+0.80- atoms. There are a spread of Sm–Te bond distances ranging from 3.23–3.35 Å. There are five inequivalent Te+0.80- sites. In the first Te+0.80- site, Te+0.80- is bonded in a 6-coordinate geometry to two equivalent Sm2+ and four equivalent Te+0.80- atoms. All Te–Te bond lengths are 3.12 Å. In the second Te+0.80- site, Te+0.80- is bonded in a 6-coordinate geometry to two equivalent Sm2+ and four equivalent Te+0.80- atoms. In the third Te+0.80- site, Te+0.80- is bonded in a 8-coordinate geometry to four equivalent Sm2+ and four equivalent Te+0.80- atoms. All Te–Te bond lengths are 3.12 Å. In the fourth Te+0.80- site, Te+0.80- is bonded in a 5-coordinate geometry to five Sm2+ atoms. In the fifth Te+0.80- site, Te+0.80- is bonded in a 5-coordinate geometry to five Sm2+ atoms.