Materials Data on CeMnSi2 by Materials Project
CeMnSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ce4+ is bonded in a 10-coordinate geometry to ten Si4- atoms. There are a spread of Ce–Si bond distances ranging from 3.07–3.13 Å. Mn4+ is bonded to four equivalent Si4- atoms to form a mixture of edge and corner-sharing MnSi4 tetrahedra. There are two shorter (2.36 Å) and two longer (2.37 Å) Mn–Si bond lengths. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 9-coordinate geometry to four equivalent Ce4+, four equivalent Mn4+, and one Si4- atom. The Si–Si bond length is 2.43 Å. In the second Si4- site, Si4- is bonded in a 9-coordinate geometry to six equivalent Ce4+ and three Si4- atoms. Both Si–Si bond lengths are 2.34 Å.