The Structure Of Chloroxiphite, Pb3CuO2 (OH)2 Cl2*

J. J. Finney, E. J. Graeber, A. Rosenzweig and R. D. Hamilton
Department of Geology, Colorado School of Mines, Golden, Colorado 80401
Sandia Laboratories, Albuquerque, New Mexico 87115
Department of Geology, Oberlin College, Oberlin, Ohio 44074
Department of Geology, Colorado School of Mines, Golden, Colorado 80401
*This work was supported by the U.S. Energy Research and Development Administration.

Summary: Chloroxiphite, Pb3CuO2(OH)2Cl2, is monoclinic, space group P21/m, with a = 10·458, b = 5·750, c = 6·693 Å, β = 97·79°, Z = 2. The structure has been refined by the method of least squares from three-dimensional Mo-Kα intensity data to a conventional R value of 0·115. The structure consists of sheets of composition [Pb3 CuO2(OH)3]2−, in themselves made up of the layer sequence Pb-(O, OH, Cu)-Pb, lying parallel to (1¯01). The structure contains eight-fold PbO4Cl4 and seven-fold PbO5Cl2 polyhedra common in other oxychlorides, Pb6 clusters and copper atoms in square planar, Cu(OH)4, coordination.

Mineralogical Magazine; September 1977 v. 41; no. 319; p. 357-361; DOI: 10.1180/minmag.1977.041.319.07
© 1977, The Mineralogical Society
Mineralogical Society (www.minersoc.org)