Refinement of the Crystal Structure of Botallackite

F. C. Hawthorne
Department of Earth Sciences, University of Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2

Abstract: The crystal structure of botallackite, Cu2(OH)3Cl, monoclinic, a = 5.717(1), b = 6.126(1), c = 5.636(1)Å, β = 93.07(1)°, V = 197.06(5)Å3, space group P21/m, Z = 1, has been refined to an R index of 3.8% for 350 observed (4σ) reflections, measured with Mo- X-radiation on an automatic four-circle diffractometer. The structure consists of sheets of edge-sharing Cuϕ6 (ϕ = unspecified anion) octahedra of composition Cu2(OH)3Cl; these sheets are // {100}, and are joined by hydrogen bonding between oxygen and chlorine anions, thus accounting for the perfect {100} cleavage and the platy habit of botallackite.

Keywords: crystal structure • botallackite • Botallack Mine • Cornwall

Mineralogical Magazine; March 1985 v. 49; no. 350; p. 87-89; DOI: 10.1180/minmag.1985.049.350.12
© 1985, The Mineralogical Society
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