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Piemontite from
Monte Brugiana manganese mineralisation (Artana Mn deposit; Monte Brugiana - La Rocchetta), Monte Brugiana north slope, Carrara, Massa-Carrara Province, Tuscany, Italy

Locality type:Occurrence
Classification
Species:Piemontite
Formula:{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Comments:REE-rich piemontite with total amount of rare earth elements ranging from 2.85 to 8.06 (oxides) wt% (La is the prevaling element). It appears as bended veinleits, about 1 cm thiek, cuttinga quartzite matrix. Associated minerals are braunite, Mn-oxides, titanite, apatite and mica.
Colour:Deep red.
Confirmation
Validity:Believed Valid
References
References:Bonazzi, P., Garbarino, C., and Menchetti, S. (1992) Crystal chemistry of piemontites: REE-bearing piemontite from Monte Brugiana, Alpi Apuane, Italy. European Journal of Mineralogy, 4, 23-33.
Data
Mineral Data:Click here to view Piemontite data
Locality Data:Click here to view Monte Brugiana manganese mineralisation (Artana Mn deposit; Monte Brugiana - La Rocchetta), Monte Brugiana north slope, Carrara, Massa-Carrara Province, Tuscany, Italy
 
矿物 and/or 产地  
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