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Corvusite Mineral Data

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General Corvusite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca,K)V8O20•4(H2O)
Help on Composition: Composition: Molecular Weight = 829.26 gm
   Potassium   0.71 %  K     0.85 % K2O
   Sodium      1.66 %  Na    2.24 % Na2O
   Calcium     1.21 %  Ca    1.69 % CaO
   Vanadium   49.14 %  V    87.73 % V2O5
   Hydrogen    0.97 %  H     8.69 % H2O
   Oxygen     46.30 %  O
             ______        ______ 
             100.00 %      101.21 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.6Ca0.25K0.15V5+8O20•4(H2O)
Help on Environment: Environment: Widely distributed in U-V deposits of the Colorado Plateau.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1933
Help on Locality: Locality: Jack claim, Grand County, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Latin "corvus", raven, in allusion to the bird's color.
Help on Synonym: Synonym: ICSD 64792
  PDF 45-1363
 

Corvusite Image

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  Corvusite

Comments: Silky to dull brown corvusite in/on sandstone.
Location: Fire Fly Mine, near Delta, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Vanoxite   Corvusite

Comments: Blue-black, somewhat silky vanoxite, with brown corvusite on sandstone.
Location: Club Mine, Uravan, Montrose County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Corvusite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.2124:1:3.0461
Help on Cell Dimensions: Cell Dimensions: a = 11.706, b = 3.644, c = 11.1, Z = 1; beta = 103.46° V = 460.48 Den(Calc)= 2.99
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.81(1), 1.937(0.05), 3.59(0.05),
 

Physical Properties of Corvusite

Help on Color: Color: Brown, Bluish black, Greenish black.
Help on Density: Density: 2.82
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: bluish black
 

Optical Properties of Corvusite

Help on Optical Data: Optical Data: NCalc= 2.01 - from Gladstone-Dale relationship (KC = 0.3373) where Ncalc=Dcalc*KC+1
NCalc= 1.95 - from Gladstone-Dale relationship (KC = 0.3373) where Ncalc=Dmeas*KC+1
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Corvusite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   10.30   20.70 
   
 420 nm    9.80   19.80 
 440 nm    9.30   18.90 
 460 nm    9.00   18.00 
 480 nm    8.70   17.30 
 500 nm    8.50   16.60 
 520 nm    8.40   16.00 
 540 nm    8.20   15.60 
 560 nm    8.20   15.10 
 580 nm    8.10   14.70 
 600 nm    8.00   14.30 
 620 nm    8.00   14.00 
 640 nm    8.00   13.70 
 660 nm    8.00   13.50 
 680 nm    8.00   13.40 
 700 nm    8.00   13.30 
Calculated Relative Intensity Colors of Corvusite in Air
Relative
Intensity
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%
R1                      
R2                      
 

Calculated Properties of Corvusite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Corvusite =2.99 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014694835
Boson Index = 0.9985305165
Help on Photoelectric: Photoelectric: PECorvusite = 9.68 barns/electron
U=PECorvusite x relectron= 27.81 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 9.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Corvusite per GRapi unit = 10.21 (%)

Estimated Radioactivity from Corvusite - barely detectable

 

Corvusite Classification

Help on  Dana Class: Dana Class: 47.03.02.02 (47)Vanadium Oxysalts
  (47.03)(Hydrated)
  (47.03.02)Straczekite Group
 
47.03.02.01 Straczekite (Ca,K,Ba)(V5,V4)8O20•3H2O C 2/m 2/m
 
47.03.02.02 Corvusite (Na,Ca,K)V8O20•4(H2O) C 2/m 2/m
 
47.03.02.03 Fernandinite CaV8O20•4(H2O) C 2/m 2/m
 
47.03.02.04 Bariandite Al0.6V8O20•9(H2O) C 2/c 2/m
 
47.03.02.05 Bokite (Al,Fe)1.3(V,Fe)8O20•4.7(H2O) C 2/m 2/m
 
47.03.02.06 Kazakhstanite Fe5V3V12O39(OH)9•9(H2O) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.HE.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.H - V[5,6] Vanadates
  04.HE -Phyllovanadates
 
04.HE.20 Bokite (Al,Fe)1.3(V,Fe)8O20•4.7(H2O) C 2/m 2/m
 
04.HE.20 Bariandite Al0.6V8O20•9(H2O) C 2/c 2/m
 
04.HE.20 Corvusite (Na,Ca,K)V8O20•4(H2O) C 2/m 2/m
 
04.HE.20 Fernandinite CaV8O20•4(H2O) C 2/m 2/m
 
04.HE.20 Straczekite (Ca,K,Ba)(V5,V4)8O20•3H2O C 2/m 2/m
 

Other Corvusite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Corvusite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Corvusite

(Na,Ca,K)V8O20•4(H2O)
Dana No: 47.03.02.02 Strunz No: 04.HE.20
Locality:

 

Notes:

 

 
   
 


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