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Tre Croci, Vetralla, Vico Lake, Viterbo Province, Latium, Italy

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(Tre Croci, Vetralla, Lago di Vico, Viterbo, Lazio, Italia)

Miarolitic cavities in thermometamorphic ejecta from a pyroclastic formation of the Vico volcanic complex.
Host rock: High sanidine, plagioclase, clinopyroxene, clinoamphibole, magnetite and biotite.

The correct locality where piergorite-(Ce), mottanaite-(Ce), muscovite and some other species occur, is "L'Ulivo" at Tre Croci di Vetralla.

Refs.:
Della Ventura, G., Bellatreccia, F., and Williams, C.T. (1999) Zr- and LREE-rich titanite from Tre Croci, Vico Volcanic complex (Latium, Italy). Mineralogical Magazine: 63: 123-130.




Group 3 - Halides
  		• Fluorite3.AB.25
    CaF
     
    2
    Group 4 - Oxides and Hydroxides
  		• Asbecasite4.JB.30
    Ca
     
    3
    		(Ti,Sn
    4+
     
    		)Be
     
    2
    		[(AsO
     
    3
    		)
     
    3
    		|SiO
     
    4
    		]
     
    2
  		• Baddeleyite4.DE.35
    ZrO
     
    2
  		• Betafite4.DH.15
    (Ca,U)
     
    2
    		(Ti,Nb)
     
    2
    		O
     
    6
    		(OH)
  		• Cryptomelane4.DK.10
    K(Mn
    4+
     
    		,Mn
    2+
     
    		)
     
    8
    		O
     
    16
  		• Magnetite4.BB.05
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
  		• Rutile4.DB.05
    TiO
     
    2
  		• Uraninite
    var: Thorian Uraninite    		4.DL.05
    (U,Th)O
     
    2
  		• Zirconolite4.DH.30
    CaZrTi
     
    2
    		O
     
    7
    Group 6 - Borates
  		• Vonsenite6.AB.30
    Fe
    2+
    2
    		Fe
    3+
     
    		[O
     
    2
    		|BO
     
    3
    		]
    Group 8 - Phosphates, Arsenates and Vanadates
  		• Apatite-(CaOH)8.BN.05
    Ca
     
    5
    		[OH|(PO
     
    4
    		)
     
    3
    		]
    Group 9 - Silicates
  		• Afghanite9.FB.05
    (Na,Ca,K)
     
    8
    		[(Cl
     
    2
    		,SO
     
    4
    		,CO
     
    3
    		)
     
    3
    		|Al
     
    6
    		Si
     
    6
    		O
     
    24
    		] · 0.5H
     
    2
    		O
  		• Biotite9..
  		• Ciprianiite (TL)9.DK.20
    Ca
     
    4
    		[(Th,U)(REE)]Al[]
     
    2
    		(Si
     
    4
    		B
     
    4
    		O
     
    22
    		)(OH,F)
     
    2
  		• Danburite9.FA.65
    CaB
     
    2
    		Si
     
    2
    		O
     
    8
  		• Hellandite-(Ce)9.DK.20
    (Ca,Ce)
     
    6
    		(Al,Fe
    3+
     
    		)Si
     
    4
    		B
     
    4
    		O
     
    20
    		(OH)
     
    4
  		• Homilite9.AJ.20
    Ca
     
    2
    		(Fe
    2+
     
    		,Mg)B
     
    2
    		[O|SiO
     
    4
    		]
     
    2
  		• Mottanaite-(Ce)9.DK.20
    Ca
     
    4
    		(CeCa)AlBe
     
    2
    		(Si
     
    4
    		B
     
    4
    		O
     
    22
    		)O
     
    2
  		• Muscovite9.EC.15
    KAl
     
    2
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Nosean9.FB.10
    Na
     
    8
    		[SO
     
    4
    		|Al
     
    6
    		Si
     
    6
    		O
     
    24
    		]
  		• Phlogopite9.EC.20
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Piergorite-(Ce) (TL)9.DL.10
    Ca
     
    8
    		(Ce,Th,La,Nd)
     
    2
    		(Al
     
    0.5
    		,Fe
    3+
    0.5
    		)([],Li,Be)
     
    2
    		Si
     
    6
    		B
     
    8
    		O
     
    36
    		(OH,F)
     
    2
  		• Pollucite9.GB.05
    (Cs,Na)
     
    2
    		[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
  		• Sanidine9.FA.30
    K[AlSi
     
    3
    		O
     
    8
    		]
  		• Sodalite9.FB.10
    Na
     
    8
    		[Cl
     
    2
    		|Al
     
    6
    		Si
     
    6
    		O
     
    24
    		]
  		• Stillwellite-(Ce)9.AJ.25
    (Ce,La,Ca)BSiO
     
    5
  		• Tadzhikite-(Ce)9.DK.20
    (Ca,Ce)
     
    4
    		(Ce,Y)
     
    2
    		(Ti
    4+
     
    		,Fe
    3+
     
    		,Al)[B
     
    4
    		Si
     
    4
    		O
     
    22
    		](OH)
     
    2
  		• Thorite9.AD.30
    (Th,U)[SiO
     
    4
    		]
  		• Titanite9.AG.15
    CaTi[O|SiO
     
    4
    		]
  		• Vicanite-(Ce) (TL)9.AJ.35
    (Ca,Ce,La,Th)
     
    15
    		As
    5+
     
    		(As
    3+
    0.5
    		,Na
     
    0.5
    		)Fe
    3+
     
    		Si
     
    6
    		B
     
    4
    		O
     
    40
    		F
     
    7
  		• Zircon9.AD.30
    Zr[SiO
     
    4
    		]
    Unclassified Minerals
  		• 'Albite-Anorthite Series'-
  		• 'Apatite'-
  		• 'Clinopyroxene Subgroup'-
  		• 'Guarinite'-
    (Na, Ca, Zr, Si, F, O)
  		• 'Hornblende'-
  		• 'Tourmaline'-


    37 entries listed. 30 valid minerals.

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