Mn3Ni2Si crystallizes in the cubic Fd-3m space group. Mn(1) is bonded in a 14-coordinate geometry to eight equivalent Mn(1), four equivalent Ni(1), and two equivalent Si(1) atoms. Ni(1) is bonded in a 12-coordinate geometry to six equivalent Mn(1), three equivalent Ni(1), and three equivalent Si(1) atoms. Si(1) is bonded to six equivalent Mn(1) and six equivalent Ni(1) atoms to form face-sharing SiMn6Ni6 cuboctahedra.
Mn3Ni2Si crystallizes in the cubic Fd-3m space group. Mn(1) is bonded in a 14-coordinate geometry to eight equivalent Mn(1), four equivalent Ni(1), and two equivalent Si(1) atoms. There are four shorter (2.82 Å) and four longer (2.88 Å) Mn(1)-Mn(1) bond lengths. There are two shorter (2.49 Å) and two longer (2.72 Å) Mn(1)-Ni(1) bond lengths. Both Mn(1)-Si(1) bond lengths are 2.73 Å. Ni(1) is bonded in a 12-coordinate geometry to six equivalent Mn(1), three equivalent Ni(1), and three equivalent Si(1) atoms. All Ni(1)-Ni(1) bond lengths are 2.60 Å. All Ni(1)-Si(1) bond lengths are 2.33 Å. Si(1) is bonded to six equivalent Mn(1) and six equivalent Ni(1) atoms to form face-sharing SiMn6Ni6 cuboctahedra.