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 % 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

Empirical Formula:

Mg₅(PO₄)₂(CO₃)(OH)₂•4.5(H₂O)

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Kovdorskite= 1.24 barns/electron
U=PE_Kovdorskite x rElectron 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:

Notes:

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