Vicanite-(Ce)
A valid IMA mineral species
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About Vicanite-(Ce)
Formula:
(Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7
Colour:
Green, yellow
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
4.73 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
Named after its discovery locality, Vican (Vico Lake) volcanic complex, Latium, Viterbo, Italy.
Type Locality:
Unique Identifiers
Mindat ID:
7354
Long-form identifier:
mindat:1:1:7354:3
GUID
(UUID V4):
(UUID V4):
a18d34bd-8315-4516-b225-3e5d6a7834de
IMA Classification of Vicanite-(Ce)
Approved
IMA Formula:
(Ca,Ce,La,Th)15As5+(As3+,Na)0.5Fe3+0.7Si6B4(O,F)47
Approval year:
1991
Classification of Vicanite-(Ce)
9.AJ.35
9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
54.3.1.1
54 : NESOSILICATES Borosilicates and Some Beryllosilicates
3 :
54 : NESOSILICATES Borosilicates and Some Beryllosilicates
3 :
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Vic-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Vicanite-(Ce)
Vitreous
Transparency:
Transparent
Colour:
Green, yellow
Streak:
White
Hardness:
5 - 6 on Mohs scale
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
4.73 g/cm3 (Calculated)
Comment:
Measured greater than 4.2. Calculated based on empirical formula and the measured unit-cell dimensions.
Optical Data of Vicanite-(Ce)
Type:
Uniaxial (-)
RI values:
nω = 1.757(2) nε = 1.722(2)
Max Birefringence:
δ = 0.035
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Non-pleochroic
Chemistry of Vicanite-(Ce)
Mindat Formula:
(Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7
Crystallography of Vicanite-(Ce)
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 2 Å, c = 27.3296(12) Å
Ratio:
a:c = 1 : 13.665
Unit Cell V:
94.67 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Vertical prism terminated by a pyramid.
Twinning:
Sometimes present, resulting in pseudocubic crystals.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0002883 | Vicanite-(Ce) | Ballirano P, Callegari A, Caucia F, Maras A, Mazzi F, Ungaretti L (2002) The crystal structure of vicanite - (Ce), a borosilicate showing an unusual (Si3B3O18) polyanion American Mineralogist 87 1139-1143 | 2002 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.993 Å | (100) |
2.950 Å | (70) |
7.70 Å | (50) |
4.42 Å | (50) |
3.13 Å | (50) |
2.698 Å | (50) |
1.839 Å | (50) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
19 : Granitic intrusive rocks |
Type Occurrence of Vicanite-(Ce)
General Appearance of Type Material:
Transparent yellowish green anhedral grains or rare rice-grain crystals, up to 0.3 mm in size.
Place of Conservation of Type Material:
Museo di Mineralogia, Universita di Roma "La Sapienza" (MMUR), Roma, Italy, under catalogue number 2450911.
Geological Setting of Type Material:
Thermometamorphic volcanic ejectum from a pyroclastic formation.
Associated Minerals at Type Locality:
Reference:
Maras, A., Parodi, G.C., Ventura, G.D., Ohnenstetter, D. (1995) Vicanite-(Ce): a new Ca-Th-REE borosilicate from the Vico volcanic district (Latium, Italy). European Journal of Mineralogy: 7: 439-446.
Synonyms of Vicanite-(Ce)
Other Language Names for Vicanite-(Ce)
German:Vicanit-(Ce)
Russian:Виканит-(Ce)
Relationship of Vicanite-(Ce) to other Species
Member of:
Other Members of this group:
Arrheniusite-(Ce) | CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11 | Trig. 3m : R3m |
Hundholmenite-(Y) | (Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48 | Trig. 3m : R3m |
Laptevite-(Ce) | Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11 | Trig. 3m : R3m |
Okanoganite-(Y) | (Na,Ca)3(Y,Ce)12Si6B2O27F14 | Trig. 3m : R3m |
Proshchenkoite-(Y) | Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14 | Trig. 3m : R3m |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
9.AJ. | Hingganite-(Nd) | Nd2◻Be2Si2O8(OH)2 |
9.AJ. | Arrheniusite-(Ce) | CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11 |
9.AJ.05 | Grandidierite | (Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2 |
9.AJ.05 | Ominelite | (Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2 |
9.AJ.10 | Dumortierite | Al(Al2O)(Al2O)2(SiO4)3(BO3) |
9.AJ.10 | Holtite | (Ta0.6◻0.4)Al6BSi3O18(O,OH)2.25 |
9.AJ.10 | Magnesiodumortierite | Mg(Al2OH)(Al2O)2(SiO4)3(BO3) |
9.AJ.10 | Nioboholtite | (Nb0.6◻0.4)Al6BSi3O18 |
9.AJ.10 | Titanoholtite | (Ti0.75◻0.25)Al6BSi3O18 |
9.AJ.15 | Garrelsite | Ba3NaSi2B7O16(OH)4 |
9.AJ.20 | Muromontite | near Be2FeY2Si3O12 |
9.AJ.20 | Datolite | CaB(SiO4)(OH) |
9.AJ.20 | Gadolinite-(Ce) | (Ce,La,Nd,Y)2Fe2+Be2Si2O10 |
9.AJ.20 | Gadolinite-(Y) | Y2Fe2+Be2Si2O10 |
9.AJ.20 | Hingganite-(Ce) | (Ce,REE)2(◻,Fe2+)Be2[SiO4]2(OH)2 |
9.AJ.20 | Hingganite-(Y) | (Y,REE,Ca)2(◻,Fe2+)Be2[SiO4]2(OH)2 |
9.AJ.20 | Hingganite-(Yb) | (Yb,Y,REE)2◻Be2[SiO4]2(OH)2 |
9.AJ.20 | Homilite | Ca2(Fe2+,Mg)B2Si2O10 |
9.AJ.20 | Melanocerite-(Ce) | (Ce,Ca)5(SiO4,BO4)3(OH,0) |
9.AJ.20 | Minasgeraisite-(Y) | (Ca2Y2)◻2(Be2B2)[SiO4]4(OH)4 |
9.AJ.20 | Calcybeborosilite-(Y) | (Y,Ca)2(◻,Fe2+)(B,Be)2[SiO4]2(OH,O)2 |
9.AJ.20 | Gadolinite-(Nd) | Nd2Fe2+Be2O2(SiO4)2 |
9.AJ.20 | Unnamed (OH-analogue of Gadolinite-(Y)) | (Y,Ca)2(Fe,◻)Be2Si2O8(OH,O)2 |
9.AJ.25 | Stillwellite-(Ce) | (Ce,La,Ca)BSiO5 |
9.AJ.30 | Cappelenite-(Y) | Ba(Y,Ce)6Si3B6O24F2 |
9.AJ.35 | Okanoganite-(Y) | (Na,Ca)3(Y,Ce)12Si6B2O27F14 |
9.AJ.35 | Hundholmenite-(Y) | (Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48 |
9.AJ.35 | Proshchenkoite-(Y) | Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14 |
9.AJ.35 | Laptevite-(Ce) | Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11 |
9.AJ.40 | Jadarite | LiNaSiB3O7(OH) |
Fluorescence of Vicanite-(Ce)
Not fluorescent in LW or SW UV
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Vicanite-(Ce)
mindat.org URL:
https://www.mindat.org/min-7354.html
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References for Vicanite-(Ce)
Localities for Vicanite-(Ce)
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Italy | |
| Caponera et al. (2007) |
| American Mineralogist |
Della Ventura et al. (1999) +3 other references | |
| Signoretti et al. (2004) +1 other reference |
Stoppani (1994) +2 other references | |
| O Dziallas |
www.gminromano.it (2005) |
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Vico volcanic complex, Viterbo Province, Lazio, Italy