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Borcarite Mineral Data

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General Borcarite Information

Help on Chemical  Formula: Chemical Formula: Ca4MgB4O6(OH)6(CO3)2
Help on Composition: Composition: Molecular Weight = 545.92 gm
   Calcium    29.37 %  Ca   41.09 % CaO
   Magnesium   4.45 %  Mg    7.38 % MgO
   Boron       7.92 %  B    25.51 % B2O3
   Hydrogen    1.11 %  H     9.90 % H2O
   Carbon      4.40 %  C    16.12 % CO2
   Oxygen     52.75 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca4MgB4O6(OH)6(CO3)2
Help on Environment: Environment: In kotoite marbles, near the contact with granodiorite.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Snezhnoye boron deposit, Izvestkovyi stream, Tas-Khayakhtakh Range, Polar Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the BORate and CARbonate in the composition.
Help on Name Pronunciation: Name Pronunciation: Borcarite + Pronunciation Say BORCARITE
Help on Synonym: Synonym: ICSD 80438
  PDF 22-532

Borcarite Image

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  Borcarite   Szaibelyite

Comments: Pale aqua granular borcarite with white fibrous to granular szaibelyite.
Location: Nalednoya, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Numanoite   Borcarite

Comments: Zoned borcarite (Bc) crystal with a core of green numanoite (Nm). CanMin 45:307.
Location: Fuka mine, 40 km west-northwest of Okayama City, western Japan. Scale: See Image.
© Canadian Mineralogist

Borcarite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.1288:1:0.5304
Help on Cell Dimensions: Cell Dimensions: a = 17.84, b = 8.38, c = 4.445, Z = 2; beta = 102.04° V = 649.91 Den(Calc)= 2.79
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.886(1), 2.67(1), 7.57(1),

Physical Properties of Borcarite

Help on Cleavage: Cleavage: {100} Perfect, {110} Perfect
Help on Color: Color: Blue green, Colorless, Green, Greenish blue.
Help on Density: Density: 2.77
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Borcarite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2268,KPDmeas= 0.2284,KC= 0.2236
Ncalc = 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.59, b=1.651, g=1.657, bire=0.0670, 2V(Calc)=32, 2V(Meas)=30.

Calculated Properties of Borcarite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Borcarite =2.79 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEBorcarite = 3.85 barns/electron
U=PEBorcarite x rElectron Density= 10.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Borcarite is Not Radioactive

Borcarite Classification

Help on  Dana Class: Dana Class: (27)Compound Borates
  (27.01)Dana Type
  (27.01.03)Dana Group Borcarite Ca4MgB4O6(OH)6(CO3)2 C 2/m 2/m Numanoite! Ca4CuB4O6(OH)6(CO3)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.DA.40 06 - BORATES
  06.D - Tetraborates
  06.DA -Neso-tetraborates
06.DA.40 Borcarite Ca4MgB4O6(OH)6(CO3)2 C 2/m 2/m
06.DA.40 Numanoite! Ca4CuB4O6(OH)6(CO3)2 C 2/m 2/m

Other Borcarite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(Am.Min.,Vol.81,1996)
Help on See Also: See Also: Links to other databases for Borcarite :
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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Dana No: Strunz No: 06.DA.40





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