B crystallizes in the monoclinic C2/m space group. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to two equivalent B(2), two equivalent B(3), and two equivalent B(4) atoms. In the second B site, B(2) is bonded in a 7-coordinate geometry to one B(1), two equivalent B(2), two equivalent B(3), and two equivalent B(4) atoms. In the third B site, B(3) is bonded in a 6-coordinate geometry to two equivalent B(1) and four equivalent B(2) atoms. In the fourth B site, B(4) is bonded in a 4-coordinate geometry to one B(1), one B(4), and two equivalent B(2) atoms.
B crystallizes in the monoclinic C2/m space group. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to two equivalent B(2), two equivalent B(3), and two equivalent B(4) atoms. Both B(1)-B(2) bond lengths are 1.92 Å. There is one shorter (1.72 Å) and one longer (2.05 Å) B(1)-B(3) bond length. Both B(1)-B(4) bond lengths are 1.68 Å. In the second B site, B(2) is bonded in a 7-coordinate geometry to one B(1), two equivalent B(2), two equivalent B(3), and two equivalent B(4) atoms. There is one shorter (1.70 Å) and one longer (2.04 Å) B(2)-B(2) bond length. There is one shorter (1.76 Å) and one longer (1.88 Å) B(2)-B(3) bond length. There is one shorter (1.68 Å) and one longer (1.70 Å) B(2)-B(4) bond length. In the third B site, B(3) is bonded in a 6-coordinate geometry to two equivalent B(1) and four equivalent B(2) atoms. In the fourth B site, B(4) is bonded in a 4-coordinate geometry to one B(1), one B(4), and two equivalent B(2) atoms. The B(4)-B(4) bond length is 1.63 Å.