Materials Data on SmMnGe2 by Materials Project

Abstract

SmMnGe2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Sm is bonded in a 10-coordinate geometry to five equivalent Mn and ten Ge atoms. There are one shorter (3.29 Å) and four longer (3.44 Å) Sm–Mn bond lengths. There are a spread of Sm–Ge bond distances ranging from 3.18–3.29 Å. Mn is bonded in a 5-coordinate geometry to five equivalent Sm and five Ge atoms. There are a spread of Mn–Ge bond distances ranging from 2.38–2.42 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a distorted single-bond geometry to six equivalent Sm and one Mn atom. In the second Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Sm and four equivalent Mn atoms.