Corvusite
A valid IMA mineral species - grandfathered
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About Corvusite
Formula:
(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 Β· 6-10H2O
Colour:
Blue-black, brown
Hardness:
2½ - 3
Specific Gravity:
2.82
Crystal System:
Monoclinic
Member of:
Name:
From "corvus", raven, in allusion to the color.
Unique Identifiers
Mindat ID:
1138
Long-form identifier:
mindat:1:1:1138:5
GUID
(UUID V4):
(UUID V4):
0fd85c62-4320-444c-83b1-d5f19cad41c5
IMA Classification of Corvusite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Na,Ca,K)1-x(V5+,V4+,Fe2+)8O20 Β· 4H2O
First published:
1933
Classification of Corvusite
4.HE.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
47.3.2.2
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
7.12.11
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta
Mineral Symbols
As of 2021 there are now IMAβCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cvu | IMAβCNMNC | Warr, L.N. (2021). IMAβCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Corvusite
Transparency:
Opaque
Comment:
Lusterous
Colour:
Blue-black, brown
Streak:
Blue-black to brown
Hardness:
2½ - 3 on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.82 g/cm3 (Measured) 3.02 g/cm3 (Calculated)
Optical Data of Corvusite
Type:
Biaxial
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 10.3% | 20.7% |
420nm | 9.8% | 19.8% |
440nm | 9.3% | 18.9% |
460nm | 9.0% | 18.0% |
480nm | 8.7% | 17.3% |
500nm | 8.5% | 16.6% |
520nm | 8.4% | 16.0% |
540nm | 8.2% | 15.6% |
560nm | 8.2% | 15.1% |
580nm | 8.1% | 14.7% |
600nm | 8.0% | 14.3% |
620nm | 8.0% | 14.0% |
640nm | 8.0% | 13.7% |
660nm | 8.0% | 13.5% |
680nm | 8.0% | 13.4% |
700nm | 8.0% | 13.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 20.7%.
R1 shown in black, R2 shown in red
Chemistry of Corvusite
Mindat Formula:
(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 Β· 6-10H2O
Crystallography of Corvusite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 11.706 Å, b = 3.644 Å, c = 11.11 Å
β = 103.47°
β = 103.47°
Ratio:
a:b:c = 3.212 : 1 : 3.049
Unit Cell V:
460.88 Γ
Β³ (Calculated from Unit Cell)
Z:
1
Morphology:
Massive.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.82 Γ | (100) |
3.590 Γ | (6) |
3.464 Γ | (18) |
3.255 Γ | (2) |
2.595 Γ | (3) |
1.934 Γ | (4) |
1.819 Γ | (6) |
Comments:
Very similar to the data for fernandinite.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47e : [Vanadates, chromates, manganates] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Corvusite
Co-Type Localities:
General Appearance of Type Material:
Massive, but slickenside action can make it appear fibrous. With numerous shrinkage cracks.
Place of Conservation of Type Material:
National School of Mines, Paris, France.
National Museum of Natural History, Washington, D.C., USA, 96806.
National Museum of Natural History, Washington, D.C., USA, 96806.
Geological Setting of Type Material:
Uranium and vandadium mineralization in fossil vegitation in sandstone.
Associated Minerals at Type Locality:
Reference:
Henderson, E.P., Hess, F.L. (1933) Corvusite and rilandite, new minerals from the Utah-Colorado carnotite region. American Mineralogist: 18: 195-205.
Synonyms of Corvusite
Other Language Names for Corvusite
German:Corvusit
Russian:ΠΠΎΡΠ²ΡΡΠΈΡ
Simplified Chinese:ζ°΄ε€ιηΏ
Spanish:Corvusita
Traditional Chinese:ζ°΄εΎ©ι©η€¦
Relationship of Corvusite to other Species
Member of:
Other Members of this group:
Bariandite | Al0.6(V5+,V4+)8O20 Β· 9H2O | Mon. |
Bokite | (Al,Fe)1.3(V5+,V4+,Fe3+)8O20 Β· 7.5H2O | Mon. |
Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 Β· 10H2O | Mon. 2/m : B2/m |
Straczekite | (Ca,K,Ba)(V5+,V4+)8O20 Β· 3H2O | Mon. 2/m : B2/m |
Common Associates
Associated Minerals Based on Photo Data:
17 photos of Corvusite associated with Montroseite | (V3+,Fe3+)O(OH) |
12 photos of Corvusite associated with Pascoite | Ca2Ca(V10O28) Β· 17H2O |
6 photos of Corvusite associated with Uraninite | UO2 |
5 photos of Corvusite associated with Lasalite | Na2Mg2(V10O28) Β· 20H2O |
4 photos of Corvusite associated with Metahewettite | CaV6O16 Β· 3H2O |
4 photos of Corvusite associated with Sandstone | |
3 photos of Corvusite associated with Gypsum | CaSO4 Β· 2H2O |
3 photos of Corvusite associated with Pascoite Group | |
3 photos of Corvusite associated with Rossite | Ca(VO3)2 Β· 4H2O |
3 photos of Corvusite associated with Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} |
Related Minerals - Strunz-mindat Grouping
4.HE.05 | Melanovanadite | Ca(V5+,V4+)4O10 Β· 5H2O |
4.HE.10 | Shcherbinaite | V5+2O5 |
4.HE.15 | Hewettite | CaV6O16 Β· 9H2O |
4.HE.15 | Metahewettite | CaV6O16 Β· 3H2O |
4.HE.20 | Bariandite | Al0.6(V5+,V4+)8O20 Β· 9H2O |
4.HE.20 | Bokite | (Al,Fe)1.3(V5+,V4+,Fe3+)8O20 Β· 7.5H2O |
4.HE.20 | Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 Β· 10H2O |
4.HE.20 | Straczekite | (Ca,K,Ba)(V5+,V4+)8O20 Β· 3H2O |
4.HE.25 | HΓ€ggite | V3+V4+O2(OH)3 |
4.HE.30 | Doloresite | V4+3O4(OH)4 |
4.HE.35 | Duttonite | V4+O(OH)2 |
4.HE.40 | Cavoite | CaV4+3O7 |
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 Corvusite
mindat.org URL:
https://www.mindat.org/min-1138.html
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References for Corvusite
Localities for Corvusite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
β - 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.
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Temple Mountain Mining District, Emery County, Utah, USA