B is alpha boron structured and crystallizes in the trigonal R-3m space group. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to three equivalent B(1) and three equivalent B(2) atoms. In the second B site, B(2) is bonded in a 7-coordinate geometry to three equivalent B(1) and four equivalent B(2) atoms.
B is alpha boron structured and crystallizes in the trigonal R-3m space group. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to three equivalent B(1) and three equivalent B(2) atoms. There is one shorter (1.67 Å) and two longer (1.74 Å) B(1)-B(1) bond lengths. There is one shorter (1.79 Å) and two longer (1.80 Å) B(1)-B(2) bond lengths. In the second B site, B(2) is bonded in a 7-coordinate geometry to three equivalent B(1) and four equivalent B(2) atoms. There are two shorter (1.77 Å) and two longer (2.01 Å) B(2)-B(2) bond lengths.