Materials Data on Sm2Si5Pd3 by Materials Project
Sm2Pd3Si5 crystallizes in the orthorhombic Ibam space group. The structure is three-dimensional. Sm3+ is bonded in a 10-coordinate geometry to ten Si+2.40- atoms. There are a spread of Sm–Si bond distances ranging from 3.07–3.25 Å. There are two inequivalent Pd2+ sites. In the first Pd2+ site, Pd2+ is bonded in a distorted hexagonal planar geometry to six Si+2.40- atoms. There are four shorter (2.51 Å) and two longer (2.64 Å) Pd–Si bond lengths. In the second Pd2+ site, Pd2+ is bonded in a 5-coordinate geometry to five Si+2.40- atoms. There are a spread of Pd–Si bond distances ranging from 2.41–2.46 Å. There are three inequivalent Si+2.40- sites. In the first Si+2.40- site, Si+2.40- is bonded in a 2-coordinate geometry to four equivalent Sm3+, three Pd2+, and two equivalent Si+2.40- atoms. Both Si–Si bond lengths are 2.49 Å. In the second Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to four equivalent Sm3+, three Pd2+, and two equivalent Si+2.40- atoms. In the third Si+2.40- site, Si+2.40- is bonded in a 8-coordinate geometry to four equivalent Sm3+ and four equivalent Pd2+ atoms.