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Karpenkoite

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About KarpenkoiteHide

Formula:
Co3(V2O7)(OH)2·2H2O
Colour:
Orange
Lustre:
Vitreous
Specific Gravity:
Crystal System:
Trigonal
Name:
Named in honor of the Russian mineralogist Vladimir Yu. Karpenko (b. 1965), an expert in the mineralogy of vanadium.
The Co analogue of martyite. At the type locality karpenkoite occurs as a secondary mineral formed during the post-mining oxidation of corvusite and montroseite in a moist environment at ambient temperatures.


Classification of KarpenkoiteHide

Approved
Approval Year:
2015

Physical Properties of KarpenkoiteHide

Vitreous
Transparency:
Transparent
Colour:
Orange
Comment:
pale yellow-orange
Tenacity:
Brittle
Cleavage:
Perfect
on {001}.
Parting:
with laminated fracture
Density:

Optical Data of KarpenkoiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.827() nε = 1.843(8)
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of KarpenkoiteHide

Formula:
Co3(V2O7)(OH)2·2H2O
IMA Formula:
Co3(V2O7)(OH)2 · 2H2O

Crystallography of KarpenkoiteHide

Crystal System:
Trigonal
Cell Parameters:
a = 6.016(4) Å, c = 7.234(6) Å
Ratio:
a:c = 1 : 1.202
Unit Cell V:
226.7 ų
Z:
1
Morphology:
Lamellar crystals, coarsely hexagonal or irregular in shape, typically curved. The crystals form rose-like clusters or globular aggregates up to 0.2 mm across.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.15(100)
5.19(18)
4.20(25)
3.59(21)
2.95(54)
2.77(21)
2.60(36)
2.44(33)
Comments:
From Type Description.

Type Occurrence of KarpenkoiteHide

General Appearance of Type Material:
on sandstone matrix
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4605/1
Geological Setting of Type Material:
Sandstone
Associated Minerals at Type Locality:

Synonyms of KarpenkoiteHide

Relationship of Karpenkoite to other SpeciesHide

Other Members of this group:
MartyiteZn3(V2O7)(OH)2 · 2H2OTrig. 3m : P3m1
VolborthiteCu3(V2O7)(OH)2 · 2H2OMon. 2/m : B2/m

Other InformationHide

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 KarpenkoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kasatkin, A.V., Plášil, J., Pekov, I.V., Nestola, F., Čejka, J., Belakovskiy, D.I., Vigasina, M.F., Zorzi, F. and Thorne, B. (2015): Karpenkoite, IMA 2014-092. CNMNC Newsletter No. 24, April 2015, page 249; Mineralogical Magazine, 79, 247-251
Kasatkin, A.V., Plášil, J., Pekov, I.V., Belakovskiy, D.I., Nestola, F., Čejka, J., Vigasina, M.F., Zorzi, F., Thorne, B. (2015): Karpenkoite, Co3(V2O7)(OH)2·2H2O, a cobalt analogue of martyite from the Little Eva mine, Grand County, Utah, USA. Journal of Geosciences, 60, 251-257.

Internet Links for KarpenkoiteHide

Localities for KarpenkoiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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). 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Utah
    • Grand Co.
      • Thompsons District (S. E. Thomsons)
        • Yellow Cat Mesa
Kasatkin, A.V., Plášil, J., Pekov, I.V., Nestola, F., Čejka, J., Belakovskiy, D.I., Vigasina, M.F., Zorzi, F. and Thorne, B. (2015): Karpenkoite, IMA 2014-092. CNMNC Newsletter No. 24, April 2015, page 249; Mineralogical Magazine, 79, 247-251; Kasatkin, A.V., Plášil, J., Pekov, I.V., Belakovskiy, D.I., Nestola, F., Čejka, J., Vigasina, M.F., Zorzi, F., Thorne, B. (2015): Karpenkoite, Co3(V2O7)(OH)2·2H2O, a cobalt analogue of martyite from the Little Eva mine, Grand County, Utah, USA. Journal of Geosciences, 60, 251-257.
Mineral and/or Locality  
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