| | Book (edition) | chemical analysis (see mainly fluorapatite). Aphthitalite K 2Na 2 [S0 4 ]z (7A). Trigonal, PJmJ, a,c =...Odokeri, near Egbe, Kwara State, and at Kontagora, Niger State, both Nigeria, in crystals to 1 kg with tantalite...(-).Ina vein up to l cm thick, with anhydrite, aphthitalite, etc., also as filling of cavities in exposive...uraninite. Similar are U ore deposits near Agades, Niger, and at the Mounana mine, 55 km NW of Franceville...and in Taghouaji ring granite complex Air Mts., Niger. Pink crystals to 2 cm occur in quartz veins at |
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