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Phengite from
Mangabeira deposit, Monte Alegre de Goiás, Goiás, Brazil

Locality type:Deposit
Classification
Species:Muscovite var: Phengite
Formula:KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Comments:Aluminium-phengite in Li-siderophyllite granite.
Phengite replaces Li-siderophyllite.

Lithium-phengite in topaz-albite granite.
Confirmation
Validity:Believed Valid
References
References:M. Abrahao Moura et al. , Revista Brasileira de Geociensas, June 2000, 30(2), pp. 270-273
Data
Mineral Data:Click here to view Phengite data
Locality Data:Click here to view Mangabeira deposit, Monte Alegre de Goiás, Goiás, Brazil
Mineral and/or Locality  
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