Vote for your favorite mineral in #MinCup26! - Monazite-(Ce) vs. Andalusite
It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Lisbon Volcanic Complex, Lisbon, Portugal


Locality type:Volcanic Complex
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Lisbon Volcanic Complex, Lisbon, Portugal
Data Identifiers
Mindat Occurrence Record ID:1408697
Long-form Identifier:1:3:1408697:3
GUID (UUID V4):0
References
ALVES, C. A. M.
RODRIGUES, B.
de Jesus, A. M., & Zbyszewski, G. (1952). Contribution à l'étude du" Complexe basaltique" de Lisbonne. Communicações dos Serviços Geológicos de Portugal, 33, 185-220.
SERRALHEIRO, A. & FARIA, A. F. (1980) - Complexo Basáltico de Lisboa. Com. Serv. Geol. de Portugal, 66, pp. 111-134.
Miranda, R., Valadares, V., Terrinha, P., Mata, J., do Rosario Azevedo, M., Gaspar, M., ... & Ribeiro, C. (2009). Age constraints on the Late Cretaceous alkaline magmatism on the West Iberian Margin. Cretaceous Research, 30(3), 575-586.
 
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