Materials Data on HoMnB4 by Materials Project
HoMnB4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Ho3+ is bonded in a 4-coordinate geometry to fourteen B+1.50- atoms. There are a spread of Ho–B bond distances ranging from 2.58–2.71 Å. Mn3+ is bonded in a 10-coordinate geometry to ten B+1.50- atoms. There are a spread of Mn–B bond distances ranging from 2.24–2.28 Å. There are four inequivalent B+1.50- sites. In the first B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Ho3+, two equivalent Mn3+, and three B+1.50- atoms. There are a spread of B–B bond distances ranging from 1.73–1.83 Å. In the second B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Ho3+, two equivalent Mn3+, and three B+1.50- atoms. The B–B bond length is 1.79 Å. In the third B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Ho3+, two equivalent Mn3+, and three B+1.50- atoms. There is one shorter (1.72 Å) and one longer (1.78 Å) B–B bond length. In the fourth B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to two equivalent Ho3+, four equivalent Mn3+, and three B+1.50- atoms. The B–B bond length is 1.70 Å.