Results 61 to 70 of about 108 (92)
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Heating experiments on amazonite
Mineralogical Magazine and Journal of the Mineralogical Society, 1957SummaryThe rate of decolorization of a Norwegian amazonite was studied at various temperatures: near 500° C. it was almost instantaneous, becoming successively slower with lower temperatures, until at 300° C. no change was visible in 10 hours. It is concluded that the colour is stable indefinitely below about 270° C.
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Connoisseur's Choices Microcline, Variety Amazonite
Rocks & Minerals, 1993(1993). Connoisseur's Choices Microcline, Variety Amazonite. Rocks & Minerals: Vol. 68, No. 4, pp. 248-250.
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Amazonite from the alkali granite of the Avdar Massif, Mongolia
TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 1981The green feldspar in alkali granite from the Avdar deposit of decoration stone (150 km W of Ulan-Bator) has been identified by means of physical and chemical methods as amazonite. Its structural state corresponds to that of microcline with a high degree of triclinicity and displaying the following anomalous dimensions of the unit cell (nm):a=0.8568,b ...
E. Pivec, J. Ševčik, J. Ulrych
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Implications of amazonite to sulfide-silicate equilibria
1985This item was digitized as part of a project to share McGill's intellectual legacy with the public. If you are the copyright holder or a relative of the copyright holder who is deceased, you may request withdrawal by emailing escholarship.library@mcgill.ca.
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Book Review: Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism
American Mineralogist, 2017Book Review: Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism. (2016) By Mikhail Ostrooumov. Elsevier. ISBN: 978-0-1280-3721-8, 228 p. $120. This new book is a translation of the original Russian language edition, which the author Mikhail Ostrooumov published in 2008 together with his colleagues A. Platonov and V.
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Albitization and amazonitization related to a Nb−Ta deposit in altered granite
Geochemistry, 1983A Nb- Ta- rare metal deposit has been discovered in an albitization-, amazonitization-granite by using amazonite as an indicator. The ore-bearing dyke, early Yenshanian in age, occurs in a Late Jurassic metamorphic sandstone and breccia. Three stages of albite can be distinguished, shewing regular variations in composition, optical property and ...
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Characterization of Pb and selected trace elements in amazonitic K-feldspar
2006Amazonitic K-feldspar is characteristic of evolved granitic pegmatites of NYF (niobium-yttrium-fluorine) type, associated with A-type granite emplacement. In this work, I focus on four notable examples of such an association: (1) West Keivy, Kola Peninsula, Russia, (2) Saint-Ludger-de-Milot, Quebec, (3) Lac Sairs, Quebec, and (4) Morefield, Virginia. A
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