Crystal structure of pentastrontium tris(phosphate) bromide, Sr5(PO4)3Br and of pentabarium tris(phosphate) bromide Ba5(PO4)3Br, two bromoapatites

BrO12P3Sr5, hexagonal, P63/m (No. 176), a = 9.972(1) A, c = 7.214(1) A, V = 621.3 A3, Z = 2, Rgt(F) = 0.042, wRall(F) = 0.024, T = 293 K. Ba5BrO12P3, hexagonal, P63/m (No. 176), a = 10.342(2) A, c = 7.673(2) A, V = 710.7 A3, Z = 2, Rgt(F) = 0.022, wRall(F) = 0.015, T = 293 K.