Mineralogy Database

Kovdorskite Mineral Data

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General Kovdorskite Information

Help on Chemical  Formula: Chemical Formula: Mg5(PO4)2(CO3)(OH)2•4.5(H2O)
Help on Composition: Composition: Molecular Weight = 486.56 gm
   Magnesium   24.98 %  Mg   41.42 % MgO
   Phosphorus  12.73 %  P    29.17 % P2O5
   Hydrogen     2.28 %  H    20.36 % H2O
   Carbon       2.47 %  C     9.05 % CO2
   Oxygen      57.54 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg5(PO4)2(CO3)(OH)2•4.5(H2O)
Help on Environment: Environment: Found in magnetite-forsterite rocks.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Kovdor massif, Kola Pneinsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Kovdorskite + Pronunciation Say KOVDORSKITE
Help on Synonym: Synonym: ICSD 20796
  PDF 45-1380

Kovdorskite Image

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Comments: Gemmy crystal of icy blue kovdorskite.
Location: Kheleznyi Mine, Kovdor, Kola Penisula, Russia. Scale: Crystal size 1 cm.
© John Veevaert

Kovdorskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3674:1:0.8023
Help on Cell Dimensions: Cell Dimensions: a = 4.74, b = 12.9, c = 10.35, Z = 2; beta = 102° V = 619.03 Den(Calc)= 2.61
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.96(1), 2.258(0.64), 2.821(0.59),

Physical Properties of Kovdorskite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Greenish blue, Light pink, Pink.
Help on Density: Density: 2.6
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 4 - Fluorite
Help on Streak: Streak: white

Optical Properties of Kovdorskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.08 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2066,KPDmeas= 0.2074,KC= 0.2245
Ncalc = 1.58 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.527, b=1.542, g=1.549, bire=0.0220, 2V(Calc)=68, 2V(Meas)=80. Dispersion r > v very weak.

Calculated Properties of Kovdorskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Kovdorskite =2.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEKovdorskite = 1.24 barns/electron
U=PEKovdorskite x rElectron Density= 3.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kovdorskite is Not Radioactive

Kovdorskite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.08)Dana Group Kovdorskite Mg5(PO4)2(CO3)(OH)2•4.5(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.DC.22 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
08.DC.22 Kovdorskite Mg5(PO4)2(CO3)(OH)2•4.5(H2O) P 21/c 2/m

Other Kovdorskite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Kovdorskite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 08.DC.22





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