Carboborite Mineral Data

Carboborite Mineral Data
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General Carboborite Information

Help on Chemical Formula: Chemical Formula: Ca2Mg(CO3)2B2(OH)8•4(H2O)
Help on Composition: Composition: Molecular Weight = 454.22 gm
   Calcium    17.65 %  Ca   24.69 % CaO
   Magnesium   5.35 %  Mg    8.87 % MgO
   Boron       4.76 %  B    15.33 % B2O3
   Hydrogen    3.55 %  H    31.73 % H2O
   Carbon      5.29 %  C    19.38 % CO2
   Oxygen     63.40 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Mg(CO3)2B2(OH)8•4(H2O)
Help on Environment: Environment: Lacustrine borate deposit.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: China, at an unspecified locality [Dafangshan, Qinghai Plateau, Tibet]. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the essential anionic chemical components, CARBOnate and BORate.
Help on Synonym: Synonym: ICSD 64685
  PDF 17-529
 

Carboborite Image

Click Here for Larger Carboborite Image in a New Browser Window Images:
Click Here for Larger Carboborite Image

Carboborite

Comments: Pure crystalline cleavage fragment of carboborite.
Location: Inlamartit, Turkey. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Carboborite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.7829:1:1.6946
Help on Cell Dimensions: Cell Dimensions: a = 18.59, b = 6.68, c = 11.32, Z = 4; beta = 91.683° V = 1,405.12 Den(Calc)= 2.15
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.315(1), 5.63(1), 3.136(0.8),
Click Here for Large Carboborite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Zhesheng M , Nicheng S , Jinchuan S , Zhizhong P , Bulletin de Mineralogie , 104 (1981) p.578-581, The refinement of the crystal structure of carboborite MgCa2[CO3]2[B(OH)4]2*4H2O

 

Physical Properties of Carboborite

Help on Color: Color: Colorless.
Help on Density: Density: 2.12
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Fluorescent, Short UV=white, Long UV=white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Carboborite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2515,KPDmeas= 0.255,KC= 0.2513
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.5069, b=1.5459, g=1.5693, bire=0.0624
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Carboborite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Carboborite =2.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PECarboborite = 2.45 barns/electron
U=PECarboborite x rElectron Density= 5.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Carboborite is Not Radioactive
 

Carboborite Classification
Help on Dana Class: Dana Class: 27.01.01.01 (27)Compound Borates
  (27.01)Dana Type
  (27.01.01)Dana Group
 
27.01.01.01 Carboborite Ca2Mg(CO3)2B2(OH)8•4(H2O) P 21/n 2/m
Help on Strunz Class: Strunz Class: 06.AC.50 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
 
06.AC.50 Carboborite Ca2Mg(CO3)2B2(OH)8•4(H2O) P 21/n 2/m
 

Other Carboborite 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 Carboborite :
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
15 - WWW-MINCRYST

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Ask about Carboborite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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

Carboborite

Ca2Mg(CO3)2B2(OH)8•4(H2O)
Dana No: 27.01.01.01 Strunz No: 06.AC.50
Locality:

 

Notes: