Annealing of synthetic hammarite, Cu2Pb2Bi4S9, and the nature of cation-ordering processes in the bismuthinite-aikinite series

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Abstract

The progress of ordering of Cu+ and Pb2+ in synthetic hammarite, Cu2Pb2Bi4S9, has been monitored by the form and sharpness of satellite reflections in electron diffraction patterns and by high-resolution transmission electron microscopy (HRTEM). The results of annealing experiments indicate that in nature intermediate compositions in the bismuthinite-aikinite series consist of compositionally well-ordered polysome strips, which, depending on the initial composition and the cooling rate, may remain as disordered intergrowths (stacking disorder), form ordered intergrowths, or fully order into the supercell minerals. -from Author

Original languageEnglish
Pages (from-to)1166-1173
Number of pages8
JournalAmerican Mineralogist
Volume80
Issue number11-12
DOIs
Publication statusPublished - 1 Jan 1995
Externally publishedYes

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