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Vicanite-(Ce)

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Big Photo

Vico Lake, Viterbo Province, Latium, Italy
© L. Mattei

Show Vicanite-(Ce) Photos (18)



Formula:
(Ca,Ce,La,Th)
 
15
As
5+
 
(As
3+
0.5
,Na
 
0.5
)Fe
3+
 
Si
 
6
B
 
4
O
 
40
F
 
7
System:TrigonalColour:Green, yellow
Lustre:VitreousHardness:5½ - 6
Member of:Vicanite Group
Name:Named after its discovery locality, Vican (Vico Lake) volcanic complex, Latium, Viterbo, Italy.


Vicanite Group.

Classification of Vicanite-(Ce)

IMA status:Approved 1991
Strunz 8th edition ID:8/B.33-25
Nickel-Strunz 10th (pending) edition ID:9.AJ.35

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
Dana 8th edition ID:54.3.1.1

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
3 :
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Type Occurrence of Vicanite-(Ce)

Type Locality:Tre Croci, Vetralla, Vico Lake, Viterbo Province, Latium, Italy

Physical Properties of Vicanite-(Ce)

Lustre:Vitreous
Colour:Green, yellow
Streak:White
Hardness (Mohs):5½ - 6

Crystallography of Vicanite-(Ce)

Crystal System:Trigonal

Optical Data of Vicanite-(Ce)

Type:Uniaxial (-)
RI values: nω = 1.757 nε = 1.722
Maximum Birefringence:δ = 0.035

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High

Chemical Properties of Vicanite-(Ce)

Formula:
(Ca,Ce,La,Th)
 
15
As
5+
 
(As
3+
0.5
,Na
 
0.5
)Fe
3+
 
Si
 
6
B
 
4
O
 
40
F
 
7
Essential elements:As, B, Ca, F, Fe, O, Si
All elements listed in formula:As, B, Ca, Ce, F, Fe, La, Na, O, Si, Th

Relationship of Vicanite-(Ce) to other Species

Member of:Vicanite Group
Other Members of Group:

- +
Hundholmenite-(Y)
(Y,REE,Ca,Na)
 
15
(Al,Fe
3+
 
)(Ca
 
x
As
3+
1-x
)(Si,As
5+
 
)Si
 
6
B
 
3
(O,F)
 
48
Laptevite-(Ce)
Ca
 
6
(Fe
2+
 
,Mn
2+
 
)Y
 
3
REE
 
7
(SiO
 
4
)
 
3
(PO
 
4
)(B
 
3
Si
 
3
O
 
18
)(BO
 
3
)F
 
11
Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
Proshchenkoite-(Y)
Ca(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
Related Minerals - Nickel-Strunz Grouping):

- +
9.AJ.05Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
9.AJ.05Ominelite
(Fe
2+
 
,Mg)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
9.AJ.10Dumortierite
(Al,Fe
3+
 
)
 
7
(SiO
 
4
)
 
3
(BO
 
3
)O
 
3
9.AJ.10Holtite
Al
 
6
(Al,Ta)(SiO
 
4
,SbO
 
4
,AsO
 
4
)
 
3
(BO
 
3
)O
 
3
9.AJ.10Magnesiodumortierite
(Mg,Ti,◻(Al,Mg)
 
2
Al
 
4
Si
 
3
O
 
18-y
(OH)
 
y
B y = 2-3
9.AJ.15Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
9.AJ.20Bakerite
Ca
 
4
(H
 
5
B
 
5
Si
 
3
O
 
20
)
9.AJ.20Datolite
Ca(HBSiO
 
5
)
9.AJ.20Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
Si
 
2
O
 
10
9.AJ.20Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
Si
 
2
O
 
10
9.AJ.20Hingganite-(Ce)
(Ce,REE)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Y)
(Y,REE,Ca)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Hingganite-(Yb)
(Yb,Y,REE)
 
2
□Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
9.AJ.20Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
Si
 
2
O
 
10
9.AJ.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F) · nH
 
2
O
9.AJ.20Minasgeraisite-(Y)
CaBe
 
2
Y
 
2
Si
 
2
O
 
10
9.AJ.20Calcybeborosilite-(Y)
(Y,Ca)
 
2
(□,Fe
2+
 
)(B,Be)
 
2
[SiO
 
4
]
 
2
(OH,O)
 
2
9.AJ.25Stillwellite-(Ce)
(Ce,La,Ca)BSiO
 
5
9.AJ.30Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
9.AJ.35Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
9.AJ.35Hundholmenite-(Y)
(Y,REE,Ca,Na)
 
15
(Al,Fe
3+
 
)(Ca
 
x
As
3+
1-x
)(Si,As
5+
 
)Si
 
6
B
 
3
(O,F)
 
48
9.AJ.35Proshchenkoite-(Y)
Ca(Y,REE,Ca,Na,Mn)
 
15
Fe
2+
 
(P,Si)Si
 
6
B
 
3
O
 
34
F
 
14
9.AJ.40Jadarite
LiNaSiB
 
3
O
 
7
(OH)

Other Names for Vicanite-(Ce)

Synonyms:
IMA1991-050
Other Languages:
German:Vicanit-(Ce)
Russian:Виканит-(Ce)

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Vicanite-(Ce)

Reference List:

- +
Rivista Min. Italiana (1994), 17(3), 207-211.

Mineralogical Record: 27: 394.

European Journal of Mineralogy (1995): 7: 439-446.

Plinius (Suppl. Ital.) European Journal of Mineralogy, Società Italiana di Mineralogia e Petrologia: 6: 123-124.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Vicanite-(Ce)

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    • Localities for Vicanite-(Ce)

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Latium
      • Rome Province
    		Caponera, I., Fiori, S., Pucci, R., & Signoretti, E. (2007). I minerali dei Colli Albani. Un aggiornamento sugli ultimi dieci anni di ricerche. Rivista Mineralogica Italiana, 31 (2), 74-91.
      • Viterbo Province
        • Vico Lake
    		American Mineralogist, Volume 86, pages 1066–1075, 2001
          • Vetralla
    		O Dziallas
    http://www.gminromano.it/Cercapietre/rivista04/testo/04A04.html
    European Journal of Mineralogy; April 1995; v. 7; no. 2; p. 439-446; American Mineralogist, Volume 87, pages 1139–1143, 2002
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