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Na(REExCa1-x)(REEyCa1-y)F6 where (x ne y)
Specimen of granodiorite hosting cream colored phenocrysts of zajacite-Ce. This is one of the few minerals (less than 20) that contain Praseodymium.
Strange Lake, Lac Brasson, Quebec, Canada.
4.3 x 2.9 cm.
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