YbB2C crystallizes in the tetragonal P4_2/mbc space group. Yb(1) is bonded in a 14-coordinate geometry to four equivalent B(2), six equivalent B(1), and four equivalent C(1) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a distorted single-bond geometry to six equivalent Yb(1) and one C(1) atom. In the second B site, B(2) is bonded in a distorted water-like geometry to four equivalent Yb(1) and two equivalent C(1) atoms. C(1) is bonded in a 3-coordinate geometry to four equivalent Yb(1), one B(1), and two equivalent B(2) atoms.
YbB2C crystallizes in the tetragonal P4_2/mbc space group. Yb(1) is bonded in a 14-coordinate geometry to four equivalent B(2), six equivalent B(1), and four equivalent C(1) atoms. There are two shorter (2.65 Å) and two longer (2.68 Å) Yb(1)-B(2) bond lengths. There are a spread of Yb(1)-B(1) bond distances ranging from 2.74-2.81 Å. There are two shorter (2.60 Å) and two longer (2.64 Å) Yb(1)-C(1) bond lengths. There are two inequivalent B sites. In the first B site, B(1) is bonded in a distorted single-bond geometry to six equivalent Yb(1) and one C(1) atom. The B(1)-C(1) bond length is 1.56 Å. In the second B site, B(2) is bonded in a distorted water-like geometry to four equivalent Yb(1) and two equivalent C(1) atoms. There is one shorter (1.60 Å) and one longer (1.61 Å) B(2)-C(1) bond length. C(1) is bonded in a 3-coordinate geometry to four equivalent Yb(1), one B(1), and two equivalent B(2) atoms.