Materials Data on SmFe2SiC by Materials Project
SmFe2SiC crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Sm3+ is bonded in a 7-coordinate geometry to three equivalent Si4- and four equivalent C4- atoms. There are one shorter (2.95 Å) and two longer (2.99 Å) Sm–Si bond lengths. All Sm–C bond lengths are 2.62 Å. Fe+2.50+ is bonded in a single-bond geometry to three equivalent Si4- and one C4- atom. All Fe–Si bond lengths are 2.39 Å. The Fe–C bond length is 1.79 Å. Si4- is bonded in a 9-coordinate geometry to three equivalent Sm3+ and six equivalent Fe+2.50+ atoms. C4- is bonded to four equivalent Sm3+ and two equivalent Fe+2.50+ atoms to form a mixture of distorted edge and corner-sharing CSm4Fe2 octahedra. The corner-sharing octahedral tilt angles are 24°.