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Beccas d'Arnas, Balme, Ala Valley, Lanzo Valley, Sesia-Lanzo zone, Torino Province, Piedmont, Italy

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References:

- Barresi A.A., Caiolo M., Ambrino P., Orlandi P., 2003. Mineralogia delle Valli di Lanzo (Piemonte). Hornesite, lollingite, boulangerite e bournonite in un filone idrotermale dell'alta Val d'Ala (TO). Il Cercapietre, 1-2.
- Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.




Group 2 - Sulphides and Sulfosalts
  		• Boulangerite2.HC.15
    Pb
     
    5
    		Sb
     
    4
    		S
     
    11
  		• Bournonite2.GA.50
    PbCuSbS
     
    3
  		• Löllingite2.EB.15a
    FeAs
     
    2
    Group 4 - Oxides and Hydroxides
  		• Aeschynite-(Y)4.DF.05
    (Y,Ca,Fe,Th)(Ti,Nb)
     
    2
    		(O,OH)
     
    6
  		• Anatase4.DD.05
    TiO
     
    2
  		• Brookite4.DD.10
    TiO
     
    2
    Group 5 - Nitrates and Carbonates
  		• Ankerite5.AB.10
    Ca(Fe
    2+
     
    		 ,Mg,Mn
    2+
     
    		)(CO
     
    3
    		)
     
    2
  		• Aragonite5.AB.15
    CaCO
     
    3
  		• Calcite5.AB.05
    CaCO
     
    3
  		• Dolomite5.AB.10
    CaMg(CO
     
    3
    		)
     
    2
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Hörnesite8.CE.40
    Mg
     
    3
    		(AsO
     
    4
    		)
     
    2
    		·8H
     
    2
    		O
  		• Xenotime-(Y)8.AD.35
    YPO
     
    4
    Group 9 - Silicates
  		• Grossular9.AD.25
    Ca
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
  		• Prehnite9.DP.20
    Ca
     
    2
    		Al
     
    2
    		Si
     
    3
    		O
     
    12
    		(OH)
  		• Spessartine9.AD.25
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3


    15 entries listed. 15 valid minerals.

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