The crystal structure of hydrated barium copper oxalate

Abstract

BaCu(C2O4)2 6 H2O is triclinic, P1, with a = 6.5405(9), b = 9.202(3), c= 10.939(1) , ? = 8546(2), ? = 79.22(1), ? = 80.45(2), V = 636.99(1) 3, Z=2, D0, = 2.14, Dc = 2.465 g cm-3, R = 0.074. wR = 0.0746 for 2219 significant reflections |F0| = 6.0?F0. The barium has eleven coordinations and the coordination polyhedra is a capped antiprism. Six water oxygen atoms are coordinated whereas the other five are coming from the oxalate group. In the unit cell the molecules form a polymeric network. One lattice water molecule belongs to the coordinating water. The barium oxygen distances vary from 2.75 to 3.15 .