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Experimental Synthesis of the Rare-Earth Fluoride Gagarinite-(Ce) by Fluid-Induced Alteration of Chevkinite-(Ce)

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cris.lastimport.scopus2024-02-12T19:48:28Z
dc.abstract.enGagarinite-(Ce) [Na(Ca,Ce)2F6] has been synthesized as a product in experiments designed to examine the fluid-induced alteration of chevkinite-(Ce). The experiments were conducted at 600 °C and 400 MPa for 21 days and at 550 °C and 200 MPa for 63 days. At 600 °C, a rim of gagarinite-(Ce) was seen to develop around chevkinite-(Ce), which was itself enclosed in a glassy, amorphous material containing inclusions of albite. At 550 °C, the chevkinite-(Ce) was observed to be surrounded by a rim of gagarinite-(Ce) and fluorbritholite-(Ce), which in turn was enclosed in massive narsarsukite with inclusions of albite. This assemblage was associated with a sodic pyroxene. In the 550 °C run both rims with gagarinite-(Ce) were subsequently overgrown by both Ce-bearing frankdicksonite and a lamprophyllite group mineral identified as delindeite. Electron probe microanalyses are given of all reactant phases. The stability conditions of gagarinite-(Ce) are in accord with those inferred from the only natural occurrence, Strange Lake, Canada. The formation of gagarinite-(Ce) is ascribed to NaF being the only component added in the experiments, resulting in a very high Na/Ca ratio in the system. New parageneses for narsarsukite, frankdicksonite, and delindeite are reported.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorHarlov, Daniel E.
dc.contributor.authorMacDonald, Ray
dc.contributor.authorKotowski, Jakub
dc.contributor.authorStachowicz, Marcin
dc.contributor.authorMatyszczak, Witold
dc.contributor.authorJokubauskas, Petras
dc.contributor.authorBagiński, Bogusław
dc.date.accessioned2024-01-25T00:09:45Z
dc.date.available2024-01-25T00:09:45Z
dc.date.issued2023
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.volume61
dc.identifier.doi10.3749/2200045
dc.identifier.issn2817-1713
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/106779
dc.identifier.weblinkhttps://pubs.geoscienceworld.org/cjmp/article-pdf/61/3/593/5929738/i2817-1713-61-3-593.pdf
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofThe Canadian Journal of Mineralogy and Petrology
dc.relation.pages593-608
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enExperimental hydrothermal alteration
dc.subject.enchevkinite-(Ce)
dc.subject.engagarinite-(Ce)
dc.subject.ennarsarsukite
dc.subject.enfluorbritholite-(Ce)
dc.subject.enfrankdicksonite, delindeite
dc.titleExperimental Synthesis of the Rare-Earth Fluoride Gagarinite-(Ce) by Fluid-Induced Alteration of Chevkinite-(Ce)
dc.typeJournalArticle
dspace.entity.typePublication