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Spessartine-andradite in scapolite pegmatite, Ilmeny Mountains, Russia

Victor G. Korinevsky
Spessartine-andradite in scapolite pegmatite, Ilmeny Mountains, Russia
The Canadian Mineralogist (July 2015) 53 (4): 623-632


An unusual garnet representing a solid solution of spessartine, andradite, and almandine was found in pit no. 287, Ilmeny Mountains (Ilmeny Reserve, Chelyabinsk district, Russia). The garnet occurs in a diopside-quartz-scapolite vein cutting a scapolite-diopside rock which occurs at the contact between a calcite-dolomite carbonatite and pyroxene-scapolite glimmerite. Mossbauer spectroscopy of the garnet indicates ca.46% Fe presentas Fe (super 3+) The chemical composition of the garnet is (wt.%): SiO (sub 2) 35.45, TiO (sub 2) 0.91, Al (sub 2) O (sub 3) 16.54, Fe (sub 2) O (sub 3) 7.52, FeO 7.69, MnO 18.87, MgO 0.81, CaO 11.62, Y (sub 2) O (sub 3) 0.99, total 100.40. Its Raman and IR-spectra strongly resemble those of other Mn-rich garnets (especially calderite) and therefore they should not be used as a sole analytical technique in garnet species identification. The solid solution of andradite and spessartine is known under the acronym "spandite" in old literature.

ISSN: 0008-4476
EISSN: 1499-1276
Coden: CAMIA6
Serial Title: The Canadian Mineralogist
Serial Volume: 53
Serial Issue: 4
Title: Spessartine-andradite in scapolite pegmatite, Ilmeny Mountains, Russia
Affiliation: Russian Academy of Sciences, Institute of Mineralogy, Miass, Russian Federation
Pages: 623-632
Published: 201507
Text Language: English
Publisher: Mineralogical Association of Canada, Ottawa, ON, Canada
References: 26
Accession Number: 2016-076568
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables
N54°47'60" - N55°46'60", E60°00'00" - E60°28'00"
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Association of Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201637
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