Coalingite Mineral Data

Coalingite Mineral Data

We specialise in top quality, fine minerals from Morocco, Namibia,
South Africa, Pakistan, Democratic Republic of Congo (ZaÃƒï¿½Ã‚Â¯re) and China
Worldwide Fine Minerals by B & C GOBIN

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 ScalenohedralH-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),

Crystal Structure:

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

Pastor-Rodriguez J , Taylor H F W , Mineralogical Magazine , 38 (1971) p.286-294, Crystal structure of coalingite, Locality: New Idria serpentinite, Coalinga, California, USA, Note: occupancies altered to match formula

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

Optical Data:

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

Calculated Properties of Coalingite

Electron Density:

r_electron=2.30 gm/cc
note: r_Coalingite=2.26 gm/cc.

Fermion Index

Fermion Index = 0.03147
Boson Index = 0.96853

Photoelectric:

PE_Coalingite= 4.45 barns/electron
U=PE_Coalingite x r_electron= 10.25 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Coalingite is Not Radioactive

Coalingite Classification

Dana Class:

16b.7.6.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.7)Dana Type

(16b.7.6)Dana Group

16b.7.6.1 Coalingite Mg10Fe2(CO3)(OH)24·2(H2O) R 3c 3 2/m

Strunz Class:

V/E.01-60 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.01 - Hydromagnesite - Brugnatellite series

V/E.01-10 Hydromagnesite Mg5(CO3)4(OH)2·4(H2O) P 2₁/c 2/m

V/E.01-15 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2·4-5(H2O) P 2₁/c 2/m

V/E.01-20 Dypingite Mg5(CO3)4(OH)2·5(H2O) Unk. Mono

V/E.01-30 Giorgiosite Mg5(CO3)4(OH)2·5(H2O) ? Mono

V/E.01-40 Artinite Mg2(CO3)(OH)2·3(H2O) C 2 or C 2/m Mono

V/E.01-50 Indigirite Mg2Al2(CO3)4(OH)2·15(H2O) Unk. Mono

V/E.01-60 Coalingite Mg10Fe2(CO3)(OH)24·2(H2O) R 3c 3 2/m

V/E.01-70 Brugnatellite Mg6Fe(CO3)(OH)13·4(H2O) P 6₃/mmc 6/m 2/m 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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

Search for Coalingite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Coalingite :

AA Mineral Specimens

B & L Fine Minerals

Crystal Vaults

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

Rockshop.cz

T G Fine Minerals

Wrights Rock Shop

Translate Coalingite Mineral Data :

Ask about Coalingite 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 Español

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

Coalingite

Mg10Fe+++2(CO3)(OH)24·2(H2O)
Dana No: 16b.7.6.1 Strunz No: V/E.01-60
Locality:

Notes: