Coalingite Mineral Data

General Coalingite Information

Chemical Formula:

Mg10Fe+++2(CO3)(OH)24•2(H2O)

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

Empirical Formula:

Mg₁₀Fe³⁺₂(CO₃)(OH)₂₄•2(H₂O)

IMA Status:

Approved IMA 1965

Locality:

New Idria district, Fresno and San Benito Counties, California. Link to MinDat.org Location Data.

Name Origin:

Named after the town of Coalinga, California. The town was named after the railroad's Coaling Station "A."

Synonym:

ICSD 23571

PDF 34-82

Coalingite Image

Images:

Coalingite

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

Axial Ratios:

a:c = 1:11.98718

Cell Dimensions:

a = 3.12, c = 37.4, Z = 0.5; V = 315.29 Den(Calc)= 2.26

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/I_o): 12.467(1), 4.156(0.52), 2.674(0.13),

Physical Properties of Coalingite

Cleavage:

{???} Good

Color:

Bronze brown, Light brown, Reddish brown.

Density:

2.33 - 2.42, Average = 2.37

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Resinous

Optical Properties of Coalingite

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

Optical Data:

Uniaxial (-), e=1.56-1.59, w=1.588-1.635, bire=0.0280-0.0450.

Calculated Properties of Coalingite

Electron Density:

Bulk Density (Electron Density)=2.30 gm/cc
note: Specific Gravity of Coalingite =2.26 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Coalingite= 4.45 barns/electron
U=PE_Coalingite x rElectron Density= 10.25 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coalingite is Not Radioactive

Coalingite Classification

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

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

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Coalingite

Mg10Fe+++2(CO3)(OH)24•2(H2O)
Dana No: 16b.07.06.01 Strunz No: 05.DA.55
Locality:

Notes:

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