Materials Data on PrMnSi2 by Materials Project
PrMnSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Pr4+ is bonded in a 10-coordinate geometry to ten Si4- atoms. There are a spread of Pr–Si bond distances ranging from 3.08–3.19 Å. Mn4+ is bonded to four equivalent Si4- atoms to form a mixture of corner and edge-sharing MnSi4 tetrahedra. There are two shorter (2.36 Å) and two longer (2.40 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 Pr4+, four equivalent Mn4+, and one Si4- atom. The Si–Si bond length is 2.51 Å. In the second Si4- site, Si4- is bonded in a 9-coordinate geometry to six equivalent Pr4+ and three Si4- atoms. Both Si–Si bond lengths are 2.38 Å.