Materials Data on Ho2B4C by Materials Project
Ho2B4C crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Ho is bonded in a 2-coordinate geometry to six equivalent B and two equivalent C atoms. There are four shorter (2.72 Å) and two longer (2.97 Å) Ho–B bond lengths. Both Ho–C bond lengths are 2.40 Å. There are two inequivalent B sites. In the first B site, B is bonded in a 3-coordinate geometry to six equivalent Ho and three B atoms. There is one shorter (1.77 Å) and two longer (1.87 Å) B–B bond length. In the second B site, B is bonded in a distorted single-bond geometry to two equivalent B and one C atom. The B–C bond length is 1.50 Å. C is bonded to four equivalent Ho and two equivalent B atoms to form distorted edge-sharing CHo4B2 octahedra.
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