Fingerite Mineral Data

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General Fingerite Information

Chemical Formula:

Cu11(VO4)6O2

Composition:

Molecular Weight = 1,420.64 gm

Vanadium 21.51 % V 38.41 % V₂O₅

Copper 49.20 % Cu 61.59 % CuO

Oxygen 29.28 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₁₁(VO₄)₆O₂

IMA Status:

Approved IMA 1985

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 201626

PDF 38-378

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Fingerite Crystallography

Axial Ratios:

a:b:c =0.9865:1:0.9727

Cell Dimensions:

a = 8.1576, b = 8.2691, c = 8.0437, Z = 1; alpha = 107.144°, beta = 91.389°, gamma = 106.441° V = 497.14 Den(Calc)= 4.74

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.48(1), 3.042(0.8), 2.822(0.7),

Crystal Structure:

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Finger L W , American Mineralogist , 70 (1985) p.197-199, Fingerite Cu11O2(VO4)6: a new vanadium sublimate from Izalco Volcano, El, Salvador: crystal structure

Physical Properties of Fingerite

Color:

Black.

Density:

4.776

Diaphaniety:

Opaque

Luster:

Metallic

Streak:

dark red brown

Optical Properties of Fingerite

Optical Data:

NCalc= 2.12 - from Gladstone-Dale relationship (KC = 0.2353) where Ncalc=Dcalc*KC+1
NCalc= 2.12 - from Gladstone-Dale relationship (KC = 0.2353) where Ncalc=Dmeas*KC+1

Calculated Properties of Fingerite

Electron Density:

r_electron=4.44 gm/cc
note: r_Fingerite=4.74 gm/cc.

Fermion Index

Fermion Index = 0.00067
Boson Index = 0.99933

Photoelectric:

PE_Fingerite= 26.34 barns/electron
U=PE_Fingerite x r_electron= 116.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fingerite is Not Radioactive

Fingerite Classification

Dana Class:

41.11.3.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.11)with miscellaneous formulae

(41.11.3)Dana Group

41.11.3.1 Fingerite Cu11(VO4)6O2 P1 1

Strunz Class:

VII/B.07-20 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.07 - Stoiberite - Fingerite series

VII/B.07-05 Coparsite! Cu4O2[(As,V)O4]Cl Pbcm 2/m 2/m 2/m

VII/B.07-10 Stoiberite Cu5V2O10 P 2₁/n 2/m

VII/B.07-15 Averievite! Cu5(VO4)2O2·CuCl2 P 3 3

VII/B.07-20 Fingerite Cu11(VO4)6O2 P1 1

VII/B.07-30 Urusovite! Cu[AlAsO5] P 2₁/c 2/m

Other Fingerite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Fingerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Fingerite

Cu11(VO4)6O2
Dana No: 41.11.3.1 Strunz No: VII/B.07-20
Locality:

Notes: