Kovdorskite Mineral Data
General Kovdorskite Information
Chemical Formula:
Mg5(PO4)2(CO3)(OH)2•4.5(H2O)
Composition:
Molecular Weight = 486.56 gm
Magnesium 24.98 % Mg 41.42 % MgO
Phosphorus 12.73 % P 29.17 % P2 O5
Hydrogen 2.28 % H 20.36 % H2 O
Carbon 2.47 % C 9.05 % CO2
Oxygen 57.54 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mg5 (PO4 )2 (CO3 )(OH)2 •4.5(H2 O)
Environment:
Found in magnetite-forsterite rocks.
IMA Status:
Approved IMA 1980
Locality:
Kovdor massif, Kola Pneinsula, Russia. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Kovdorskite + Pronunciation
Synonym:
ICSD 20796
PDF 45-1380
Kovdorskite Image
Images:
Kovdorskite
Comments: Gemmy crystal of icy blue kovdorskite.
Location: Kheleznyi Mine, Kovdor, Kola Penisula, Russia.
Scale: Crystal size 1 cm.
© John Veevaert
Kovdorskite Crystallography
Axial Ratios:
a:b:c =0.3674:1:0.8023
Cell Dimensions:
a = 4.74, b = 12.9, c = 10.35, Z = 2; beta = 102° V = 619.03 Den(Calc)= 2.61
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /c
X Ray Diffraction:
By Intensity(I/Io ): 7.96(1), 2.258(0.64), 2.821(0.59),
Physical Properties of Kovdorskite
Cleavage:
None
Color:
Colorless, Greenish blue, Light pink, Pink.
Density:
2.6
Fracture:
Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Hardness:
4 - Fluorite
Streak:
white
Optical Properties of Kovdorskite
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
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
Electron Density:
Bulk Density (Electron Density)=2.64 gm/cc note: Specific Gravity of Kovdorskite =2.60 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PEKovdorskite = 1.24 barns/electronU=PEKovdorskite x r Electron Density= 3.28 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Kovdorskite is Not Radioactive
Kovdorskite Classification
Dana Class:
43.05.08.01 (43) Compound Phosphates, etc.
(43.05) (Hydrated Compound Anions With Hydroxyl or Halogen)
(43.05.08) Dana Group
43.05.08.01 Kovdorskite Mg5(PO4)2(CO3)(OH)2•4.5(H2O) P 21 /c 2/m
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
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
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
16 - WWW-MINCRYST
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Print or Cut-and-Paste your Kovdorskite Specimen Label here :
Kovdorskite
Mg5(PO4)2(CO3)(OH)2•4.5(H2O)
Dana No: 43.05.08.01 Strunz No: 08.DC.22
Locality:
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