Mineralogy Database

Kurchatovite Mineral Data

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General Kurchatovite Information

Help on Chemical  Formula: Chemical Formula: Ca(Mg,Mn,Fe++)B2O5
Help on Composition: Composition: Molecular Weight = 178.34 gm
   Calcium    22.47 %  Ca   31.44 % CaO
   Magnesium   8.18 %  Mg   13.56 % MgO
   Manganese   9.24 %  Mn   11.93 % MnO
   Iron        3.13 %  Fe    4.03 % FeO
   Boron      12.12 %  B    39.04 % B2O3
   Oxygen     44.86 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMg0.6Mn2+0.3Fe2+0.1B2O5
Help on Environment: Environment: Found in a skarn. Dimorphous with clinokurchatovite.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Solongo, Transbaikalia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Igor V. Kurchatov (1903-1960), Russian physicist.
Help on Name Pronunciation: Name Pronunciation: Kurchatovite + Pronunciation Say KURCHATOVITE
Help on Synonym: Synonym: ICSD 200803
  PDF 43-689

Kurchatovite Image

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Comments: Gray crystalline kurchatovite (arrow) in matrix (distinguishable by violet fluorescence).
Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kurchatovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3063:1:0.1524
Help on Cell Dimensions: Cell Dimensions: a = 11.15, b = 36.4, c = 5.55, Z = 24; V = 2,252.52 Den(Calc)= 3.16
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 212121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.78(1), 1.922(0.9), 2.67(0.8),

Physical Properties of Kurchatovite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Light gray.
Help on Density: Density: 3.02
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luminescence: Luminescence: Fluorescent, Long UV=bright violet.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Kurchatovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.068 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2124,KPDmeas= 0.2223,KC= 0.2082
Ncalc = 1.63 - 1.66
Help on Optical Data: Optical Data: Biaxial (-), a=1.635, b=1.681, g=1.698, bire=0.0630, 2V(Calc)=60, 2V(Meas)=66. Dispersion r > v.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Kurchatovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Kurchatovite =3.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEKurchatovite = 6.38 barns/electron
U=PEKurchatovite x rElectron Density= 19.73 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kurchatovite is Not Radioactive

Kurchatovite Classification

Help on  Dana Class: Dana Class: (24)Borates - Anhydrous
  (24.04)where (A)2 (X2O5)
  (24.04.02)Dana Group Kurchatovite Ca(Mg,Mn,Fe)B2O5 P 212121 2 2 2
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 Kurchatovite Information

Help on References: References: NAME( Dana8) 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 Kurchatovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 06.BA.10





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