The alunite supergroup consists of more than 40 mineral species that have in common the general formula DG3(TO4)2(OH,H2O)6. The D sites are occupied by monovalent (e.g. K, Na, NH4, Ag, Tl, H3O), divalent (e.g. Ca, Sr, Ba, Pb), trivalent (e.g. Bi, REE) or more rarely quadrivalent (Th) ions; G is Al or Fe3+ or rarely Ga or V; T is S6+, As5+, or P5+, and may include subordinate amounts of Cr6+ or Si4+. Many...
Research Article|January 01, 2000
Alunite-Jarosite Crystallography, Thermodynamics, and Geochronology
R. E. Stoffregen
C. N. Alpers
Reviews in Mineralogy and Geochemistry (2000) 40 (1): 453-479.
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R. E. Stoffregen, C. N. Alpers, J. L. Jambor; Alunite-Jarosite Crystallography, Thermodynamics, and Geochronology. Reviews in Mineralogy and Geochemistry ; 40 (1): 453–479. doi: https://doi.org/10.2138/rmg.2000.40.9
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