LaSiO2N crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded to six equivalent N(1) and six equivalent O(1) atoms to form face-sharing LaN6O6 cuboctahedra. In the second La site, La(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. Si(1) is bonded in a bent 120 degrees geometry to two equivalent O(1) atoms. N(1) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent N(1) atoms. O(1) is bonded in a distorted single-bond geometry to one La(1), two equivalent La(2), and one Si(1) atom.
LaSiO2N crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded to six equivalent N(1) and six equivalent O(1) atoms to form face-sharing LaN6O6 cuboctahedra. All La(1)-N(1) bond lengths are 2.57 Å. All La(1)-O(1) bond lengths are 2.79 Å. In the second La site, La(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. All La(2)-O(1) bond lengths are 2.58 Å. Si(1) is bonded in a bent 120 degrees geometry to two equivalent O(1) atoms. Both Si(1)-O(1) bond lengths are 1.66 Å. N(1) is bonded in a 4-coordinate geometry to two equivalent La(1) and two equivalent N(1) atoms. Both N(1)-N(1) bond lengths are 1.43 Å. O(1) is bonded in a distorted single-bond geometry to one La(1), two equivalent La(2), and one Si(1) atom.