Hydroxonium triaquabis(biuret-kappa O-2,O ')dichloridolanthanum(III) dichloride dihydrate

In the title compound, (H3O)[LaCl2(C2H5N3O2)(2)(H2O)(3)] Cl-2 center dot-2H(2)O, the La atom is bonded to seven O atoms ( arising from two O, O '- bidentate biuret molecules and three water molecules) and two chloride ions in an irregular arrangement. A network of N-H center dot center dot center dot O, N -H center dot center dot center dot Cl, O-H center dot center dot center dot O and O-H center dot center dot center dot Cl hydrogen bonds helps to establish the packing, leading to a three-dimensional network. The La atom, one Cl atom and four O atoms lie on a crystallographic mirror plane.