Si3N4 crystallizes in the cubic I-43d space group. Si(1) is bonded to four equivalent N(1) atoms to form corner-sharing SiN4 tetrahedra. N(1) is bonded in a trigonal planar geometry to three equivalent Si(1) atoms.
Si3N4 crystallizes in the cubic I-43d space group. Si(1) is bonded to four equivalent N(1) atoms to form corner-sharing SiN4 tetrahedra. All Si(1)-N(1) bond lengths are 1.76 Å. N(1) is bonded in a trigonal planar geometry to three equivalent Si(1) atoms.