Cupromolybdite
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About Cupromolybdite
Formula:
Cu3O(MoO4)2
Colour:
Honey-yellow to chestnut-brown or dark brown; bright yellow
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
4.512 (Calculated)
Crystal System:
Orthorhombic
Name:
For the chemical composition.
Type Locality:
Isostructural with:
Classification of Cupromolybdite
Approved
Approval Year:
2011
Physical Properties of Cupromolybdite
Adamantine
Transparency:
Translucent
Colour:
Honey-yellow to chestnut-brown or dark brown; bright yellow
Streak:
Yellow or light brown
Hardness:
3 on Mohs scale
Hardness:
VHN50=189 kg/mm2 - Vickers
Comment:
Mohs hardness derived from VHN.
Tenacity:
Brittle
Cleavage:
Distinct/Good
Fracture:
Irregular/Uneven, Splintery
Density:
4.512 g/cm3 (Calculated)
Optical Data of Cupromolybdite
Type:
Anisotropic
Anisotropism:
Distinct
Bireflectance:
Weak
Reflectivity:
| 400nm | R1=17.0% | R2= 18.5% |
| 420nm | R1=16.3% | R2= 17.7% |
| 440nm | R1=15.7% | R2= 17.1% |
| 460nm | R1=15.2% | R2= 16.5% |
| 480nm | R1=14.7% | R2= 16.1% |
| 500nm | R1=14.3% | R2= 15.7% |
| 520nm | R1=13.9% | R2= 15.3% |
| 540nm | R1=13.5% | R2= 15.0% |
| 560nm | R1=13.1% | R2= 14.6% |
| 580nm | R1=12.9% | R2= 14.3% |
| 600nm | R1=12.4% | R2= 13.8% |
| 620nm | R1=12.2% | R2= 13.6% |
| 640nm | R1=12.15% | R2= 13.5% |
| 660nm | R1=11.9% | R2= 13.2% |
| 680nm | R1=17.0% | R2= 18.5% |
| 700nm | R1=16.3% | R2= 17.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 18.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Grey, with a weak bluish hue
Internal Reflections:
Orange-red or orange-brown
Pleochroism:
Non-pleochroic
Chemical Properties of Cupromolybdite
Formula:
Cu3O(MoO4)2
IMA Formula:
Cu2+3O(Mo6+O4)2
Elements listed:
Crystallography of Cupromolybdite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 7.6638(1) Å, b = 6.8670(1) Å, c = 14.5554(2) Å
Ratio:
a:b:c = 1.116 : 1 : 2.12
Unit Cell V:
766.01 ų
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.312 | (67) |
| 3.842 | (37) |
| 3.701 | (38) |
| 3.664 | (30) |
| 3.518 | (55) |
| 3.436 | (100) |
| 3.301 | (99) |
| 3.065 | (79) |
| 2.556 | (62) |
| 2.506 | (66) |
Type Occurrence of Cupromolybdite
General Appearance of Type Material:
Prismatic or acicular crystals up to 0.15 mm in length; radiating aggregates.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia: registration number is 4072/1.
Geological Setting of Type Material:
Within 2-5 cm thick sublimate crusts, along with other fumarolic minerals.
Associated Minerals at Type Locality:
Synonyms of Cupromolybdite
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.
References for Cupromolybdite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zelenski, M.E., Zubkova, N.V., Pekov, I.V., Polekhovsky, Yu.S. & Pushcharovsky, D.Yu. (2012): Cupromolybdite, Cu3O(MoO4)2, a new fumarolic mineral from the Tolbachik volcano, Kamchatka Peninsula, Russia. European Journal of Mineralogy, 24, 749-757.
Internet Links for Cupromolybdite
mindat.org URL:
https://www.mindat.org/min-41953.html
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External Links:
Mineral Dealers:
Localities for Cupromolybdite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for 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.
Russia (TL) | |
| Zelenski, M.E., Zubkova, N.V., Pekov, I.V., Polekhovsky, Yu.S. & Pushcharovsky, D.Yu. (2012): Cupromolybdite, Cu3O(MoO4)2, a new fumarolic mineral from the Tolbachik volcano, Kamchatka Peninsula, Russia. European Journal of Mineralogy, 24, 749-757. |
Yadovitaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia