| |
 |
Corvusite Mineral Data
|
|
|
General Corvusite Information
|
 Chemical Formula: |
(Na,Ca,K)V8O20•4(H2O) |
| 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 |
| Empirical Formula: |
Na0.6Ca0.25K0.15V5+8O20•4(H2O) |
| Environment: |
Widely distributed in U-V deposits of the Colorado Plateau. |
| IMA Status: |
Valid Species (Pre-IMA) 1933 |
| Locality: |
Jack claim, Grand County, Utah, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Latin "corvus", raven, in allusion to the bird's color. |
| Synonym: |
ICSD 64792 |
| |
PDF 45-1363 |
| |
Corvusite Image |
|
Images:
|
|
|
Images:
|
|
Corvusite Crystallography
|
| Axial Ratios: |
a:b:c =3.2124:1:3.0461 |
| Cell Dimensions: |
a = 11.706, b = 3.644, c = 11.1, Z = 1; beta = 103.46° V = 460.48 Den(Calc)= 2.99 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 10.81(1), 1.937(0.05), 3.59(0.05), |
| |
Physical Properties of Corvusite
|
| Color: |
Brown, Bluish black, Greenish black. |
| Density: |
2.82 |
| Diaphaneity: |
Subtranslucent to Opaque |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Habit: |
Massive - Lamellar - Distinctly foliated fine-grained forms. |
| Hardness: |
2.5-3 - Finger Nail-Calcite |
| Luster: |
Earthy (Dull) |
| Streak: |
bluish black |
| |
Optical Properties of Corvusite
|
| 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
|
| 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
|
| Electron Density: |
Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Corvusite =2.99 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.0014694835
Boson Index = 0.9985305165 |
| Photoelectric: |
PECorvusite = 9.68 barns/electron
U=PECorvusite x relectron= 27.81 barns/cc.
|
| 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
|
| 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 |
| 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
|
| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3) |
| 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
Search for Corvusite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Corvusite :
Ask about Corvusite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
Print or Cut-and-Paste your Corvusite Specimen Label here :
|
Corvusite
(Na,Ca,K)V8O20•4(H2O)
Dana No: 47.03.02.02 Strunz No: 04.HE.20
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.
