Materials Data on Sm2Si5Pt3 by Materials Project

Sm2Pt3Si5 crystallizes in the orthorhombic Ibam space group. The structure is three-dimensional. Sm3+ is bonded in a 1-coordinate geometry to seven Pt+0.67- and ten Si+0.80- atoms. There are a spread of Sm–Pt bond distances ranging from 3.12–3.44 Å. There are a spread of Sm–Si bond distances ranging from 3.04–3.29 Å. There are two inequivalent Pt+0.67- sites. In the first Pt+0.67- site, Pt+0.67- is bonded in a 6-coordinate geometry to four equivalent Sm3+ and six Si+0.80- atoms. There are four shorter (2.50 Å) and two longer (2.63 Å) Pt–Si bond lengths. In the second Pt+0.67- site, Pt+0.67- is bonded in a 5-coordinate geometry to five equivalent Sm3+ and five Si+0.80- atoms. There are a spread of Pt–Si bond distances ranging from 2.40–2.46 Å. There are three inequivalent Si+0.80- sites. In the first Si+0.80- site, Si+0.80- is bonded in a 9-coordinate geometry to four equivalent Sm3+, three Pt+0.67-, and two equivalent Si+0.80- atoms. Both Si–Si bond lengths are 2.53 Å. In the second Si+0.80- site, Si+0.80- is bonded in a 9-coordinate geometry to four equivalent Sm3+, three Pt+0.67-, and two equivalent Si+0.80- atoms. In the third Si+0.80- site, Si+0.80- is bonded in a 8-coordinate geometry to four equivalent Sm3+ and four equivalent Pt+0.67- atoms.