YMn2SiC crystallizes in the orthorhombic Cmcm space group. Y(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and four equivalent C(1) atoms. Mn(1) is bonded in a distorted single-bond geometry to three equivalent Si(1) and one C(1) atom. Si(1) is bonded in a 9-coordinate geometry to three equivalent Y(1) and six equivalent Mn(1) atoms. C(1) is bonded to four equivalent Y(1) and two equivalent Mn(1) atoms to form a mixture of edge and corner-sharing CY4Mn2 octahedra. The corner-sharing octahedral tilt angles are 21°.
YMn2SiC crystallizes in the orthorhombic Cmcm space group. Y(1) is bonded in a 4-coordinate geometry to three equivalent Si(1) and four equivalent C(1) atoms. There is one shorter (2.95 Å) and two longer (2.99 Å) Y(1)-Si(1) bond lengths. All Y(1)-C(1) bond lengths are 2.60 Å. Mn(1) is bonded in a distorted single-bond geometry to three equivalent Si(1) and one C(1) atom. There are two shorter (2.39 Å) and one longer (2.41 Å) Mn(1)-Si(1) bond length. The Mn(1)-C(1) bond length is 1.83 Å. Si(1) is bonded in a 9-coordinate geometry to three equivalent Y(1) and six equivalent Mn(1) atoms. C(1) is bonded to four equivalent Y(1) and two equivalent Mn(1) atoms to form a mixture of edge and corner-sharing CY4Mn2 octahedra. The corner-sharing octahedral tilt angles are 21°.