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Pokrovskite

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About PokrovskiteHide

Pavel V. Pokrovski
Formula:
Mg2(CO3)(OH)2
Colour:
Pinkish-white to tan
Lustre:
Waxy, Dull
Hardness:
3
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Pavel Vladimirovich Pokrovskii (Павла Владимировича Покровского) (19 May 1912, Rybinsk, Yaroslavl, Russian Empire – 2 August 1979, Sverdlovsk, Russia), mineralogist, Institute of Geology and Geochemistry, Sverdlovsk, Russia.

Classification of PokrovskiteHide

Approved
5.BA.10

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
A : With Cu, Co, Ni, Zn, Mg, Mn
16a.3.1.5

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
11.3.5

11 : Carbonates
3 : Carbonates of Mg

Physical Properties of PokrovskiteHide

Waxy, Dull
Colour:
Pinkish-white to tan
Hardness:

Optical Data of PokrovskiteHide

Type:
Biaxial (-)
RI values:
nα = 1.537 nβ = 1.611 nγ = 1.619
2V:
Measured: 18° , Calculated: 34°
Max Birefringence:
δ = 0.082
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak

Chemical Properties of PokrovskiteHide

Formula:
Mg2(CO3)(OH)2

Crystallography of PokrovskiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 9.43 Å, b = 12.27 Å, c = 3.39 Å
β = 96.6°
Ratio:
a:b:c = 0.769 : 1 : 0.276
Unit Cell V:
389.64 ų (Calculated from Unit Cell)

Type Occurrence of PokrovskiteHide

Synonyms of PokrovskiteHide

Other Language Names for PokrovskiteHide

German:Pokrovskit
Spanish:Pokrovskita

Relationship of Pokrovskite to other SpeciesHide

Member of:
Other Members of this group:
ChukanoviteFe2+2(CO3)(OH)2Mon. 2/m : P21/b
Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
Mcguinnessite(Mg,Cu)2(CO3)(OH)2
ParádsasváriteZn2(CO3)(OH)2Mon. 2/m : P21/b
Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Magnetite3 photos of Pokrovskite associated with Magnetite on mindat.org.
Serpentine Subgroup3 photos of Pokrovskite associated with Serpentine Subgroup on mindat.org.
Hydromagnesite1 photo of Pokrovskite associated with Hydromagnesite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.BA.05AzuriteCu3(CO3)2(OH)2Mon. 2/m : P21/b
5.BA.10GeorgeiteCu2(CO3)(OH)2 · 6H2OAmor.
5.BA.10Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Kolwezite(Cu,Co)2(CO3)(OH)2Tric.
5.BA.10MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Mcguinnessite(Mg,Cu)2(CO3)(OH)2
5.BA.10NullaginiteNi2(CO3)(OH)2Mon.
5.BA.10Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
5.BA.10ChukanoviteFe2+2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.15Aurichalcite(Zn,Cu)5(CO3)2(OH)6Mon. 2/m : P21/m
5.BA.15HydrozinciteZn5(CO3)2(OH)6Mon. 2/m : B2/m
5.BA.20HoldawayiteMn6(CO3)2(OH)7(Cl,OH)Mon. 2/m : B2/m
5.BA.25DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)Orth. mmm (2/m 2/m 2/m) : Pnma
5.BA.25UM1977-03-COSiO:CaClHCa10-11(CO3)7(SiO4)Cl1-2(OH)1-2Mon.
5.BA.30Loseyite(Mn2+,Zn,Mg)4Zn3(CO3)2(OH)10Mon. 2/m
5.BA.30Sclarite(Zn,Mg,Mn2+)4Zn3(CO3)2(OH)10Mon. 2/m : B2/b

Related Minerals - Dana Grouping (8th Ed.)Hide

16a.3.1.1MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
16a.3.1.2Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
16a.3.1.3Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
16a.3.1.4Mcguinnessite(Mg,Cu)2(CO3)(OH)2
16a.3.1.4Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
16a.3.1.7Kolwezite(Cu,Co)2(CO3)(OH)2Tric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.3.1MagnesiteMgCO3Trig. 3m (3 2/m) : R3c
11.3.2BarringtoniteMgCO3 · 2H2OTric.
11.3.3NesquehoniteMgCO3 · 3H2OMon. 2/m : P21/m
11.3.4LansforditeMgCO3 · 5H2OMon. 2/m : P21/b
11.3.6ArtiniteMg2(CO3)(OH)2 · 3H2OMon.
11.3.7HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon.
11.3.8GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
11.3.9DypingiteMg5(CO3)4(OH)2 · 5H2OMon.
11.3.10EiteliteNa2Mg(CO3)2Trig.
11.3.11Mcguinnessite(Mg,Cu)2(CO3)(OH)2

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 PokrovskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1985) 70: 217.
White, J.S. (1987) Pokrovskite, a new common mineral. Mineralogical Record 18(3), 135-136.
Perchiazzi, N. and Merlino, S. (2006) The malachite-rosasite group: crystal structures of glaukosphaerite and pokrovskite. European Journal of Mineralogy, 18, 787-792.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 113: 90-94.

Internet Links for PokrovskiteHide

Localities for PokrovskiteHide

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.
Germany
 
  • Bavaria
    • Upper Palatinate
      • Winklarn
Blaß, G. and Graf, H.W. (1994) Neue Funde. Mineralien-Welt, 2/94, 46-47.; Wittern, A. (2001) Mineralfundorte in Deutschland.
Japan
 
  • Kyushu Region
    • Fukuoka Prefecture
      • Iizuka City
Prof, Seiichiro Uehara specimen and ID, Kyushu University.
Kazakhstan (TL)
 
  • North Kazakhstan
    • Aiyrtau
      • Zlatogorsk
        • Zlatogorsk ultramafic intrusion
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
USA
 
  • California
    • San Benito Co.
G. C. Jones and B. Jackson (1993) Infrared Transmission Spectra of Carbonate Minerals. Chapman and Hall
    • Sonoma Co.
Frost, Ray L. (2006) A Raman spectroscopic study of selected minerals of the rosasite group. Journal of Raman Spectroscopy 37(9):pp. 910-921.
  • Maryland
    • Montgomery Co.
      • Rockville
Min Rec 36:4 pp 435-446
  • Nevada
    • Nye Co.
      • Paradise Range
        • Gabbs District
          • Gabbs
NBMG Spec. Pub. 31 Minerals of Nevada
    • Jackson Co.
Jan H.Bernard and Jaroslav Hyrsl, 2004, Minerals and their Localities,pg 476
  • Pennsylvania
    • Lancaster Co.
      • State Line Chromite District
        • Fulton Township
FM newsletter vol.31 no.1 Jan-Mar '01 pg.6
Mineral and/or Locality  
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