Sm2C3 is Plutonium carbide structured and crystallizes in the cubic I-43d space group. Sm(1) is bonded in a 6-coordinate geometry to six equivalent C(1) atoms. C(1) is bonded to four equivalent Sm(1) and one C(1) atom to form a mixture of distorted corner and edge-sharing CSm4C trigonal bipyramids.
Sm2C3 is Plutonium carbide structured and crystallizes in the cubic I-43d space group. Sm(1) is bonded in a 6-coordinate geometry to six equivalent C(1) atoms. There are three shorter (2.58 Å) and three longer (2.71 Å) Sm(1)-C(1) bond lengths. C(1) is bonded to four equivalent Sm(1) and one C(1) atom to form a mixture of distorted corner and edge-sharing CSm4C trigonal bipyramids. The C(1)-C(1) bond length is 1.33 Å.