DOE OSTI2020
SmBC crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are five inequivalent Sm sites. In the first Sm site, Sm is bonded in a 10-coordinate geometry to five B and five C atoms. There are a spread of Sm–B bond distances ranging from 2.87–2.99 Å. There are a spread of Sm–C bond distances ranging from 2.51–2.83 Å. In the second Sm site, Sm is bonded in a 11-coordinate geometry to five B and six C atoms. There are a spread of Sm–B bond distances ranging from 2.61–2.98 Å. There are a spread of Sm–C bond distances ranging from 2.56–3.07 Å. In the third Sm site, Sm is bonded in a 2-coordinate geometry to six B and four C atoms. There are a spread of Sm–B bond distances ranging from 2.73–2.83 Å. There are a spread of Sm–C bond distances ranging from 2.65–2.71 Å. In the fourth Sm site, Sm is bonded in a 11-coordinate geometry to six B and five C atoms. There are a spread of Sm–B bond distances ranging from 2.69–2.93 Å. There are a spread of Sm–C bond distances ranging from 2.56–3.00 Å. In the fifth Sm site, Sm is bonded in a 9-coordinate geometry to four B and five C atoms. There are a spread of Sm–B bond distances ranging from 2.73–2.93 Å. There are a spread of Sm–C bond distances ranging from 2.54–2.95 Å. There are five inequivalent B sites. In the first B site, B is bonded in a distorted single-bond geometry to five Sm and one C atom. The B–C bond length is 1.49 Å. In the second B site, B is bonded in a bent 150 degrees geometry to five Sm and two C atoms. There is one shorter (1.47 Å) and one longer (1.49 Å) B–C bond length. In the third B site, B is bonded in a distorted single-bond geometry to six Sm and one C atom. The B–C bond length is 1.51 Å. In the fourth B site, B is bonded in a bent 150 degrees geometry to five Sm and two C atoms. There is one shorter (1.48 Å) and one longer (1.49 Å) B–C bond length. In the fifth B site, B is bonded in a bent 150 degrees geometry to five Sm and two C atoms. There is one shorter (1.47 Å) and one longer (1.49 Å) B–C bond length. There are five inequivalent C sites. In the first C site, C is bonded in a distorted octahedral geometry to five Sm and one B atom. In the second C site, C is bonded in a 1-coordinate geometry to five Sm and one B atom. In the third C site, C is bonded in a distorted bent 150 degrees geometry to five Sm and two B atoms. In the fourth C site, C is bonded in a distorted bent 150 degrees geometry to five Sm and two B atoms. In the fifth C site, C is bonded in a distorted bent 150 degrees geometry to five Sm and two B atoms.