 | Krivovichev, Vladimir G., Kuksa, Katherine A., Sokolov, Pavel B., Marakhovskaya, Olga Yu., Zolotarev, Andrey A., Bocharov, Vladimir N., Semenova, Tatyana F., Klimacheva, Maria E., Gussiås, Geir Atle (2022) Preiswerkite: A First Occurrence in Marble Hosting Gem Spinel Deposits, Luc Yen, Vietnam. Minerals, 12 (8) 1024 doi:10.3390/min12081024 | Journal (article/letter/editorial) | | , Tatyana F. Semenova 4 , Maria E. Klimacheva 1 and Geir Atle Gussiås 6 1 2 3 4 5 6 * Citation:...for the first time. The preiswerkite is anhedral and associated with phlogopite, aspidolite, sadanagaite...sadanagaite, pargasite, spinel, corundum, dolomite and calcite. The average compositions of preiswerkite is (Na0...preiswerkite have a narrow range of Mg# values (0.96–0.99) and define a preiswerkiteaspidolite solid-solution series...proportion of Mg, Al and Si in the precursor rocks and the increased activity of sodium and H2 O in the fluid |  | | Journal (article/letter/editorial) | | manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published...may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain...report a new occurrence of preiswerkite, a rare Na- and Al-rich trioctahedral mica (Naanalogue of eastonite)...euhedral and associated with Ca– Cr–Al-garnet, clinochlore, titanite, and calcite. Preiswerkite and associated...associated minerals fill cavities in the chromitite pod and are absent in the surrounding peridotites. The preiswerkite-rich |
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