La2O2BrCl is Matlockite-derived structured and crystallizes in the tetragonal P4mm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to four equivalent O(1), four equivalent Br(1), and one Cl(1) atom. In the second La site, La(2) is bonded in a 4-coordinate geometry to four equivalent O(1), one Br(1), and four equivalent Cl(1) atoms. O(1) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of edge and corner-sharing OLa4 tetrahedra. Br(1) is bonded in a 5-coordinate geometry to one La(2) and four equivalent La(1) atoms. Cl(1) is bonded in a 5-coordinate geometry to one La(1) and four equivalent La(2) atoms.
La2O2BrCl is Matlockite-derived structured and crystallizes in the tetragonal P4mm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to four equivalent O(1), four equivalent Br(1), and one Cl(1) atom. All La(1)-O(1) bond lengths are 2.39 Å. All La(1)-Br(1) bond lengths are 3.30 Å. The La(1)-Cl(1) bond length is 3.50 Å. In the second La site, La(2) is bonded in a 4-coordinate geometry to four equivalent O(1), one Br(1), and four equivalent Cl(1) atoms. All La(2)-O(1) bond lengths are 2.40 Å. The La(2)-Br(1) bond length is 3.36 Å. All La(2)-Cl(1) bond lengths are 3.24 Å. O(1) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of edge and corner-sharing OLa4 tetrahedra. Br(1) is bonded in a 5-coordinate geometry to one La(2) and four equivalent La(1) atoms. Cl(1) is bonded in a 5-coordinate geometry to one La(1) and four equivalent La(2) atoms.