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Mineralpedia Details for Afmite

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Afmite

Afmite

Named for the Association Française de Microminéralogie (AFM), this rare hydrated aluminum phosphate was described by Anthony R. Kampf, Mills, Rossman, Steele, Pluth and Favreau in in 2011 in the European Journal of Mineralogy (23, 269-277). According to the authors "Afmite forms in cockscomb aggregates of diamond-shaped tablets on {001}, ubiquitously contact-twinned on {001}". Afmite has a distinct pearly luster.

Formula
Al3(OH)4(H2O)3(PO 4)(PO3OH)·H2
Crystal System
Triclinic 
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Afmite from Fumade, Castelnau-de-Brassac, Tarn, Midi-Pyrénées, France

Afmite
            from Fumade, Castelnau-de-Brassac, Tarn, Midi-Pyrénées, France

Named for the Association Française de Microminéralogie (AFM), this rare hydrated aluminum phosphate was described by Anthony R. Kampf, Mills, Rossman, Steele, Pluth and Favreau in in 2011 in the European Journal of Mineralogy (23, 269-277). According to the authors "Afmite forms in cockscomb aggregates of diamond-shaped tablets on {001}, ubiquitously contact-twinned on {001}". Afmite has a distinct pearly luster. This specimen is extremly rich with crystals to about 0.3mm.

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