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Coalingite Mineral Data

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General Coalingite Information

Help on Chemical  Formula: Chemical Formula: Mg10Fe+++2(CO3)(OH)24•2(H2O)
Help on Composition: Composition: Molecular Weight = 858.96 gm
   Magnesium  28.30 %  Mg   46.92 % MgO
   Iron       13.00 %  Fe   18.59 % Fe2O3
   Hydrogen    3.29 %  H    29.36 % H2O
   Carbon      1.40 %  C     5.12 % CO2
   Oxygen     54.02 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg10Fe3+2(CO3)(OH)24•2(H2O)
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: New Idria district, Fresno and San Benito Counties, California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the town of Coalinga, California. The town was named after the railroad's Coaling Station "A."
Help on Synonym: Synonym: ICSD 23571
  PDF 34-82

Coalingite Image

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Comments: Brown micaceous sub-metallic coatings of coalingite on serpentinite rock.
Location: Near Gem Mine, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Coalingite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:11.98718
Help on Cell Dimensions: Cell Dimensions: a = 3.12, c = 37.4, Z = 0.5; V = 315.29 Den(Calc)= 2.26
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.467(1), 4.156(0.52), 2.674(0.13),

Physical Properties of Coalingite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Bronze brown, Light brown, Reddish brown.
Help on Density: Density: 2.33 - 2.42, Average = 2.37
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Resinous

Optical Properties of Coalingite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2625,KPDmeas= 0.2498,KC= 0.2631
Ncalc = 1.59 - 1.64
Help on Optical Data: Optical Data: Uniaxial (-), e=1.56-1.59, w=1.588-1.635, bire=0.0280-0.0450.

Calculated Properties of Coalingite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.30 gm/cc
note: Specific Gravity of Coalingite =2.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PECoalingite = 4.45 barns/electron
U=PECoalingite x rElectron Density= 10.25 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coalingite is Not Radioactive

Coalingite Classification

Help on  Dana Class: Dana Class: 16b.07.06.01 (16b)Carbonates - Hydroxyl or Halogen
  (16b.07)Dana Type
  (16b.07.06)Dana Group
16b.07.06.01 Coalingite Mg10Fe2(CO3)(OH)24•2(H2O) R 3c 3 2/m
Help on  Strunz Class: Strunz Class: 05.DA.55 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.55 Coalingite Mg10Fe2(CO3)(OH)24•2(H2O) R 3c 3 2/m

Other Coalingite Information

Help on References: References: NAME( MinRec) 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 Coalingite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: 16b.07.06.01 Strunz No: 05.DA.55





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