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Pakhomovskyite Mineral Data

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General Pakhomovskyite Information

Help on Chemical  Formula: Chemical Formula: Co3(PO4)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 504.18 gm
   Magnesium    1.83 %  Mg    3.04 % MgO
   Manganese    1.85 %  Mn    2.39 % MnO
   Iron         0.33 %  Fe    0.43 % FeO
   Cobalt      27.82 %  Co   35.37 % CoO
   Nickel       0.47 %  Ni    0.59 % NiO
   Phosphorus  12.35 %  P    28.29 % P2O5
   Hydrogen     3.34 %  H    29.84 % H2O
   Oxygen      52.01 %  O
              ______        ______ 
              100.00 %       99.95 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Co2.38Ni0.04Fe2+0.03(PO4)2.01•8.35(H2O)Mg0.38Mn2+0.17
Help on Environment: Environment: Found in leached fissures within dykes of dolomite carbonatite in the "Anomalous" ore of the Iron-Ore complex. Vivianite group
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Kovdor massif, Kola Peninsula, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Yakov A. Pakhomovsky (b. 1948), a mineralogist of the Geological Institute of the Kola Science Center, Russian Academy of Sciences.
Help on Synonym: Synonym: IMA2004-021
 

Pakhomovskyite Image

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  Pakhomovskyite

Comments: Pink crystals of pakhomovskyite on the matrix. (CanMin, v44:117).
Location: Dolomite carbonatite cutting phoscorites in the Iron-Ore Complex, Kovdor, Kola Peninsula, Russia. Scale: See Image.
© Canadian Mineralogist

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  Pakhomovskyite

Comments: SEM image of crystals of pakhomovskyite on the matrix. (CanMin, v44:117).
Location: Dolomite carbonatite cutting phoscorites in the Iron-Ore Complex, Kovdor, Kola Peninsula, Russia. Scale: See Image.
© Canadian Mineralogist

Pakhomovskyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7521:1:0.35
Help on Cell Dimensions: Cell Dimensions: a = 10.034, b = 13.341, c = 4.67, Z = 2; beta = 105.02° V = 603.79 Den(Calc)= 2.77
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.67(1), 2.691(0.7), 2.948(0.7),3.195(0.7), 2.408(0.6), 2.521(0.6), 3.84(0.4), 4.85(0.4),
 

Physical Properties of Pakhomovskyite

Help on Color: Color: Bright pink.
Help on Density: Density: 2.71
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: pink
 

Optical Properties of Pakhomovskyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2181,KPDmeas= 0.2229,KC= 0.2292
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Biaxial (+), a=1.581, b=1.6, g=1.631, bire=0.0500
 

Calculated Properties of Pakhomovskyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.72 gm/cc
note: Specific Gravity of Pakhomovskyite =2.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0022095942
Boson Index = 0.9977904058
Help on Photoelectric: Photoelectric: PEPakhomovskyite = 10.54 barns/electron
U=PEPakhomovskyite x rElectron Density= 28.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pakhomovskyite is Not Radioactive
 

Pakhomovskyite Classification

Help on  Dana Class: Dana Class: 40.03.06.09 (40)Hydrated Phosphates, etc
  (40.03)where (A++)3 (XO4)2 � x(H2O)
  (40.03.06)Vivianite Group
 
40.03.06.01 Vivianite Fe3(PO4)2•8(H2O) C 2/m 2/m
 
40.03.06.02 Baricite (Mg,Fe)3(PO4)2•8(H2O) C 2/m 2/m
 
40.03.06.03 Erythrite Co3(AsO4)2•8(H2O) I2/m 2/m
 
40.03.06.04 Annabergite Ni3(AsO4)2•8(H2O) I2/m 2/m
 
40.03.06.05 Kottigite Zn3(AsO4)2•8(H2O) C 2/m 2/m
 
40.03.06.06 Parasymplesite Fe3(AsO4)2•8(H2O) C 2/m 2/m
 
40.03.06.07 Hornesite Mg3(AsO4)2•8(H2O) I2/m 2/m
 
40.03.06.08 Arupite (Ni,Fe)3(PO4)2•8(H2O) I2/m 2/m
 
40.03.06.09 Pakhomovskyite! Co3(PO4)2•8(H2O) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CE.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CE -With only medium-sized cations, RO4:H2O � 1:2.5
 
08.CE.40 Arupite (Ni,Fe)3(PO4)2•8(H2O) I2/m 2/m
 
08.CE.40 Annabergite Ni3(AsO4)2•8(H2O) I2/m 2/m
 
08.CE.40 Baricite (Mg,Fe)3(PO4)2•8(H2O) C 2/m 2/m
 
08.CE.40 Erythrite Co3(AsO4)2•8(H2O) I2/m 2/m
 
08.CE.40 Ferrisymplesite Fe3(AsO4)2(OH)3•5(H2O) None
 
08.CE.40 Hornesite Mg3(AsO4)2•8(H2O) I2/m 2/m
 
08.CE.40 Kottigite Zn3(AsO4)2•8(H2O) C 2/m 2/m
 
08.CE.40 Manganohornesite (Mn,Mg)3(AsO4)2•8(H2O) P 21/c 2/m
 
08.CE.40 Parasymplesite Fe3(AsO4)2•8(H2O) C 2/m 2/m
 
08.CE.40 Vivianite Fe3(PO4)2•8(H2O) C 2/m 2/m
 
08.CE.40 Pakhomovskyite! Co3(PO4)2•8(H2O) C 2/m 2/m
 

Other Pakhomovskyite Information

Help on References: References: NAME( AmMin, v91, p1948) PHYS. PROP.(AmMin, v91, p1948) OPTIC PROP.(AmMin, v91, p1948)
Help on See Also: See Also: Links to other databases for Pakhomovskyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Pakhomovskyite Specimen Label here :

Pakhomovskyite

Co3(PO4)2•8(H2O)
Dana No: 40.03.06.09 Strunz No: 08.CE.40
Locality:

 

Notes:

 

 
   
 


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