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Appearance of basal faces in natural amethyst crystals from Four Peaks, Arizona

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Abstract:

The surface microtopography of rough basal faces and internal inhomogeneities of amethyst crystals from Four Peaks, Arizona were investigated by means of optical, scanning electron microscopes and cathodoluminescence tomography. Rough interface overgrowth was shown to have taken place along the c-axis on mechanically broken surfaces and the present rough basal surfaces were demonstrated to have formed because of later heavy dissolution.

Keywords: CRYSTAL MORPHOLOGY; DISSOLUTION; GROWTH HISTORY; NATURAL AMETHYST; ROUGH (0001) FACE

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0935-1221/2006/0018-0273

Publication date: March 1, 2006

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  • The European Journal of Mineralogy publishes original papers, review articles and letters dealing with the mineralogical sciences s.l. These include primarily mineralogy, petrology, geochemistry, crystallography and ore deposits, as well as environmental, applied and technical mineralogy. Nevertheless, papers in any related field, including cultural heritage, will be considered.
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