Clinokurchatovite Mineral Data

Clinokurchatovite Mineral Data
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General Clinokurchatovite Information

Help on Chemical Formula: Chemical Formula: Ca(Mg,Fe++,Mn)B2O5
Help on Composition: Composition: Molecular Weight = 178.53 gm
   Calcium    22.45 %  Ca   31.41 % CaO
   Magnesium   8.17 %  Mg   13.55 % MgO
   Manganese   3.08 %  Mn    3.97 % MnO
   Iron        9.38 %  Fe   12.07 % FeO
   Boron      12.11 %  B    39.00 % B2O3
   Oxygen     44.81 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMg0.6Fe2+0.3Mn2+0.1B2O5
Help on Environment: Environment: Replacement of kurchatovite in boron-bearing rocks.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Sayak-IV boron deposit, northeast Balkhash region, Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the monoclinic dimorph of kurchatovite.
Help on Synonym: Synonym: ICSD 23013
  PDF 36-389
 

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Clinokurchatovite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.1132:1:0.5105
Help on Cell Dimensions: Cell Dimensions: a = 12.19, b = 10.95, c = 5.59, Z = 8; beta = 102° V = 729.85 Den(Calc)= 3.25
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/b
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.799(1), 3.045(1), 3.093(0.8),
Click Here for Large Clinokurchatovite Structure Window Crystal Structure:

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Callegari A , Mazzi F , Tadini C , European Journal of Mineralogy , 15 (2003) p.277-282, Modular aspects of the crystal structures of kurchatovite and clinokurchatovite, Locality: Sayak, Kazackhstan

 

Physical Properties of Clinokurchatovite

Help on Color: Color: Light gray.
Help on Density: Density: 3.07 - 3.08, Average = 3.07
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Streak: Streak: gray white
 

Optical Properties of Clinokurchatovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.2189,KC= 0.2074
Ncalc = 1.64 - 1.67
Help on Optical Data: Optical Data: Biaxial (-), a=1.642-1.644, b=1.674-1.675, g=1.699-1.704, bire=0.0570-0.0600, 2V(Calc)=80-86, 2V(Meas)=82-88.
 

Calculated Properties of Clinokurchatovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.19 gm/cc
note: Specific Gravity of Clinokurchatovite =3.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEClinokurchatovite = 6.67 barns/electron
U=PEClinokurchatovite x rElectron Density= 21.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Clinokurchatovite is Not Radioactive
 

Clinokurchatovite Classification
Help on Dana Class: Dana Class: 24.04.03.01 (24)Borates - Anhydrous
  (24.04)where (A)2 (X2O5)
  (24.04.03)Dana Group
 
24.04.03.01 Clinokurchatovite Ca(Mg,Fe,Mn)B2O5 P 21/b 2/m
Help on Strunz Class: Strunz Class: 06.BA.10 06 - BORATES
  06.B - Diborates
  06.BA -Neso-diborates with double triangles B2(O,OH)5; 2(2D); 2(2D) + OH, etc.
 
06.BA.10 Clinokurchatovite Ca(Mg,Fe,Mn)B2O5 P 21/b 2/m
 
06.BA.10 Kurchatovite Ca(Mg,Mn,Fe)B2O5 P 212121 2 2 2
 

Other Clinokurchatovite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Clinokurchatovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Clinokurchatovite

Ca(Mg,Fe++,Mn)B2O5
Dana No: 24.04.03.01 Strunz No: 06.BA.10
Locality:

 

Notes: