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Fingerite

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Formula:
Cu11O2(VO4)6
System:
Triclinic
Colour:
black
Lustre:
Metallic
Name:
For Dr. Larry W. Finger (1940-), Geophysical Laboratory, Carnegie Institution of Washington
black grains up to 150 micrometers


Classification of Fingerite

Approved
Approval Year:
1983
8.BB.80

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
Dana 7th ed.:
41.11.3.1
41.11.3.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : Miscellaneous
21.1.11

21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu

Physical Properties of Fingerite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
black
Streak:
dark reddish brown
Cleavage:
None Observed
Density:
4.776 g/cm3 (Calculated)

Optical Data of Fingerite

Type:
Anisotropic
Reflectivity:
1nmR=%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 0%.
Colour in reflected light:
medium gray

Chemical Properties of Fingerite

IMA Formula:
Cu11O2(VO4)6
Elements listed in formula:

Crystallography of Fingerite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 8.15 Å, b = 8.26 Å, c = 8.04 Å
α = 107.14°, β = 91.38°, γ = 106.44°
Ratio:
a:b:c = 0.987 : 1 : 0.973
Unit Cell Volume:
V 492.64 ų (Calculated from Unit Cell)
Morphology:
Plate like and equant crystals
Twinning:
180 degree rotation about [010]

Type Occurrence of Fingerite

Place of Conservation of Type Material:
Smithsonian and Carnegie Labs
Geological Setting of Type Material:
Outer sulfate zone of fumarole "Y" indicating a sublimation temperature between 100 and 200 degrees C.

Relationship of Fingerite to other Species

8.BB.XArsenowagneriteMg2AsO4F
8.BB.05AmblygoniteLiAlPO4F
8.BB.05MontebrasiteLiAlPO4(OH)
8.BB.05TavoriteLiFe3+PO4(OH)
8.BB.10Triplite(Mn2+,Fe2+)2PO4(F,OH)
8.BB.10ZwieseliteFe2+Mn2+PO4F
8.BB.15SarkiniteMn22+AsO4(OH)
8.BB.15TriploiditeMn22+(PO4)(OH)
8.BB.15WagneriteMg2PO4F
8.BB.15WolfeiteFe22+PO4(OH)
8.BB.15StanĕkiteFe3+Mn2+O(PO4)
8.BB.15JoosteiteMn2+Mn3+O(PO4)
8.BB.15HydroxylwagneriteMg2PO4(OH)
8.BB.20HoltedahliteMg12(PO3OH,CO3)(PO4)5(OH,O)6
8.BB.20Satterlyite(Fe2+,Mg,Fe3+)12(PO3OH)(PO4)5(OH,O)6
8.BB.25AlthausiteMg4(PO4)2(OH,O)(F,◻)
8.BB.30AdamiteZn2AsO4(OH)
8.BB.30EveiteMn22+AsO4(OH)
8.BB.30LibetheniteCu2PO4(OH)
8.BB.30OliveniteCu2AsO4(OH)
8.BB.30ZincolibetheniteCuZnPO4OH
8.BB.30ZincoliveniteCuZnAsO4(OH)
8.BB.30AuriacusiteFe3+Cu2+AsO4O
8.BB.35ParadamiteZn2AsO4(OH)
8.BB.35TarbuttiteZn2(PO4)(OH)
8.BB.40BarbosaliteFe2+Fe23+(PO4)2(OH)2
8.BB.40HentscheliteCuFe23+(PO4)2(OH)2
8.BB.40LazuliteMgAl2(PO4)2(OH)2
8.BB.40ScorzaliteFe2+Al2(PO4)2(OH)2
8.BB.40WilhelmkleiniteZnFe23+(AsO4)2(OH)2
8.BB.45TrolleiteAl4(PO4)3(OH)3
8.BB.50NamibiteCu(BiO)2VO4(OH)
8.BB.55Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
8.BB.60UrusoviteCuAlO(AsO4)
8.BB.65TheoparacelsiteCu3(OH)2As2O7
8.BB.70TuraniteCu52+(VO4)2(OH)4
8.BB.75StoiberiteCu5O2(VO4)2
8.BB.85AverieviteCu5O2(VO4)2 · CuCl2
8.BB.90LipscombiteFe2+Fe23+(PO4)2(OH)2
8.BB.90RichelliteCaFe23+(PO4)2(OH,F)2
8.BB.90ZinclipscombiteZnFe23+(PO4)2(OH)2
21.1.1MetamuniriteNaV5+O3
21.1.2MuniriteNaV5+O3 · 1.9H2O
21.1.3BarnesiteNa2V65+O16 · 3H2O
21.1.4Bannermanite(Na,K)xVx4+V5+6-xO15 (0.5< x<0.9)
21.1.5HowardevansiteNaCu2+Fe23+(VO4)3
21.1.6HuemuliteNa4MgV105+O28 · 24H2O
21.1.7BlossiteCu2V25+O7
21.1.8ZiesiteCu2V25+O7
21.1.9StoiberiteCu5O2(VO4)2
21.1.10McbirneyiteCu3(VO4)2
21.1.12VolborthiteCu3V2O7(OH)2 · 2H2O
21.1.13TangeiteCaCuVO4(OH)
21.1.14VésigniéiteCu3Ba(VO4)2(OH)2
21.1.15LyonsiteCu32+Fe43+(VO4)6

Other Names for Fingerite

Name in Other Languages:
German:Fingerit
Spanish:Fingerita

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.

References for Fingerite

Reference List:
American Mineralogist (1985): 70: 193-196, 197-199.

Internet Links for Fingerite

mindat.org URL:
https://www.mindat.org/min-1550.html
Please feel free to link to this page.

Localities for Fingerite

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
El Salvador (TL)
 
  • Sonsonate Department
Amer.Min.(1985) 70, 193-196; HB4 (2000)
Mineral and/or Locality  
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