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On Twinning and microstructures in calcite and dolomite

Larsson, Ann-Kristin; Christy, Andrew


Apparent superlattice reflections obtained in electron diffraction patterns of modulated calcite and dolomite have been ascribed to local domains of various different metastable Ca-Mg ordering schemes that are not known as macroscopic phases. We show that the type "c" reflections in diffraction patterns of supposed superstructures can in fact be produced by superposition of diffraction from the host crystal and that from domains that are in an orientation related to the host by twinning on...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: American Mineralogist
DOI: 10.2138/am.2008.2520


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