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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:(CaCa)(AlAlMn3+)O[Si2O7][SiO4](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
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
Data Identifiers
Mindat Occurrence Record ID:276990
Long-form Identifier:1:3:276990:5
GUID (UUID V4):0
References
Bonazzi, Paola, Garbarino, Carlo, Menchetti, Silvio (1992) Crystal chemistry of piemontites: REE-bearing piemontite from Monte Brugiana, Alpi Apuane, Italy. European Journal of Mineralogy, 4 (1) 23-34 doi:10.1127/ejm/4/1/0023
 
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