Title

The synthesis of copper/zinc solid solutions of hydroxyl carbonates, sulphates, nitrates, chlorides and bromides

Document Type

Article

Publication Date

10-1-2011

Abstract

The relative stabilities of the copper/zinc solid solutions of hydroxyl sulphates, carbonates, nitrates, chlorides and bromides were studied by attempting their preparation using a variety of methods. All of the naturally occurring solid solutions except rosasite were obtained as single phases. Rosasite crystallized in a mixture with malachite and calcium carbonate during a room temperature preparation from calcium carbonate, copper nitrate and zinc nitrate. The solid solution with the antlerite stoichiometry [endmember Cu 3SO 4(OH) 4] as well as the nitrates were not produced by the methods employed. All of the natural polymorphs of Cu 2(OH) 3Cl were obtained and a new method for the preparationof botallackite is reported. Botallackite was found to be stable in solutionfor over a year, contrary to previous reports. A bromine-bearing analogue of botallackite was prepared. Compounds were characterized by X-ray diffractometry, which was used to determine the unit-cell parameters, and by atomic absorption spectroscopy. The relative instability of solid solutions with certain stoichiometries is discussed in terms of the Jahn-Teller effect and relative solubilities. © 2011 The Mineralogical Society.

Comments

Originally published as:

Yoder, C., Schaeffer, R., McWilliams, P., Rowand, A., Liu, X., & Shambeda, J. (2011). The synthesis of copper/zinc solid solutions of hydroxyl carbonates, sulphates, nitrates, chlorides and bromides. Mineralogical Magazine, 75(5), 2573-2582. doi:10.1180/minmag.2011.075.5.2573

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