BSi3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. B(1) is bonded to twelve equivalent Si(1) atoms to form BSi12 cuboctahedra that share corners with twelve equivalent B(1)Si12 cuboctahedra, edges with twenty-four equivalent Si(1)Si8B4 cuboctahedra, faces with six equivalent B(1)Si12 cuboctahedra, and faces with twelve equivalent Si(1)Si8B4 cuboctahedra. Si(1) is bonded to four equivalent B(1) and eight equivalent Si(1) atoms to form SiSi8B4 cuboctahedra that share corners with twelve equivalent Si(1)Si8B4 cuboctahedra, edges with eight equivalent B(1)Si12 cuboctahedra, edges with sixteen equivalent Si(1)Si8B4 cuboctahedra, faces with four equivalent B(1)Si12 cuboctahedra, and faces with fourteen equivalent Si(1)Si8B4 cuboctahedra.
BSi3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. B(1) is bonded to twelve equivalent Si(1) atoms to form BSi12 cuboctahedra that share corners with twelve equivalent B(1)Si12 cuboctahedra, edges with twenty-four equivalent Si(1)Si8B4 cuboctahedra, faces with six equivalent B(1)Si12 cuboctahedra, and faces with twelve equivalent Si(1)Si8B4 cuboctahedra. All B(1)-Si(1) bond lengths are 2.58 Å. Si(1) is bonded to four equivalent B(1) and eight equivalent Si(1) atoms to form SiSi8B4 cuboctahedra that share corners with twelve equivalent Si(1)Si8B4 cuboctahedra, edges with eight equivalent B(1)Si12 cuboctahedra, edges with sixteen equivalent Si(1)Si8B4 cuboctahedra, faces with four equivalent B(1)Si12 cuboctahedra, and faces with fourteen equivalent Si(1)Si8B4 cuboctahedra. All Si(1)-Si(1) bond lengths are 2.58 Å.