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Cadvanite
A valid IMA mineral species
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About Cadvanite
Formula:
Cd(VO3)2
Colour:
brownish-yellow
Lustre:
Adamantine, Silky, Dull
Hardness:
2½ - 3
Specific Gravity:
4.210 (Calculated)
Crystal System:
Monoclinic
Name:
For the chemical formula
Type Locality:
Known synthetic analogue
a-CdV2O6, that are isostructural with cadvanite
These are referred to as having pseudobrannerite-type structures
a-CdV2O6, that are isostructural with cadvanite
These are referred to as having pseudobrannerite-type structures
Unique Identifiers
Mindat ID:
472218
Long-form identifier:
mindat:1:1:472218:8
IMA Classification of Cadvanite
Approved
IMA Formula:
Cd(V5+O3)2
Approval year:
2025
Classification of Cadvanite
4.HG.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Cdv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cadvanite
Adamantine, Silky, Dull
Colour:
Brownish-yellow
Streak:
Pale yellow
Hardness:
2½ - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
two cleavages, possibly [100] and [001].
two cleavages, possibly [100] and [001].
Fracture:
Splintery
Density:
4.210 g/cm3 (Calculated)
Optical Data of Cadvanite
Type:
Biaxial
Orientation:
length fast
Optical Extinction:
parallel extinction
Pleochroism:
Weak
Comments:
in shades of light brown with stronger absorption parallel to the length
Comments:
The small size and poor quality of crystals coupled with the very high indices of refraction made the measurement of the optical properties impossible.
Chemistry of Cadvanite
Mindat Formula:
Cd(VO3)2
Element Weights:
Elements listed:
Crystallography of Cadvanite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.831(10) Å, b = 3.6220(9) Å, c = 7.051(5) Å
β = 103.97(2)°
β = 103.97(2)°
Ratio:
a:b:c = 2.714 : 1 : 1.947
Unit Cell V:
243.65 ų (Calculated from Unit Cell)
Z:
2
Twinning:
No twinning was observed.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.449 Å | (88) |
| 3.534 Å | (84) |
| 3.388 Å | (75) |
| 3.166 Å | (67) |
| 2.938 Å | (100) |
| 2.391 Å | (88) |
| 1.812 Å | (69) |
| 1.475 Å | (40) |
Type Occurrence of Cadvanite
General Appearance of Type Material:
poorly formed blades up to about 50 lm in length.
More commonly, it occurs as irregular grains less than 10 µm in diameter.
More commonly, it occurs as irregular grains less than 10 µm in diameter.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 76456 (holotype) and 76454 and 76457 (cotypes)
Geological Setting of Type Material:
Secondary (post-mining) mineralization forms from the oxidation of uraninite-montroseite-corvusite assemblages in a moist environment. Under ambient temperatures and generally oxidizing near-surface conditions, water reacts with pyrite to form aqueous solutions with relatively low pH. The various secondary phases that form depend upon prevailing Eh-pH conditions, as well as upon local enrichments in a variety of other elements.
Associated Minerals at Type Locality:
Synonyms of Cadvanite
Other Language Names for Cadvanite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.HG. | Calciodelrioite | Ca(VO3)2 · 4H2O |
| 4.HG. | Trebiskyite | Na3Mg2[TiV9O28] · 22H2O |
| 4.HG.05 | Fervanite | Fe3+4V5+4O16 · 5H2O |
| 4.HG.10 | Huemulite | Na4Mg(V10O28) · 24H2O |
| 4.HG.15 | Vanalite | NaAl9V12O42(OH)4 · 33H2O |
| 4.HG.20 | Simplotite | CaV4+4O9 · 5H2O |
| 4.HG.25 | Vanoxite | V4+4V5+2O13 · 8H2O |
| 4.HG.30 | Navajoite | Fe3+V5+9O24 · 12H2O |
| 4.HG.35 | Delrioite | Sr(VO3)2 · 4H2O |
| 4.HG.40 | Metadelrioite | CaSr(V2O6)(OH)2 |
| 4.HG.45 | Barnesite | (Na,Ca)V6O16 · 3H2O |
| 4.HG.50 | Hendersonite | (Ca,Sr)1.3V6O16 · 6H2O |
| 4.HG.55 | Grantsite | (Na,Ca)2+x(V5+,V4+)6O16 · 4H2O |
| 4.HG.60 | Lenoblite | V4+2O4 · 2H2O |
| 4.HG.65 | Satpaevite | Al12V4+2V5+6O37 · 30H2O |
| 4.HG.70 | Pandoraite-Ba | BaV4+5V5+2O16 · 3H2O |
| 4.HG.70 | Pandoraite-Ca | CaV4+5V5+2O16 · 3H2O |
Other Information
Notes:
At room temperature, cadvanite is slowly soluble in dilute HCl
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 Cadvanite
mindat.org URL:
https://www.mindat.org/min-472218.html
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Please feel free to link to this page.
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References for Cadvanite
Localities for Cadvanite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - 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).
All localities listed without proper references should be considered as questionable.
USA (TL) | |
| Bosi et al. (2025) +1 other reference |
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Burro Mine, San Miguel County, Colorado, USA