Coquimbite  Mineral Data

Coquimbite Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Dan Weinrich Fine Minerals
[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions]
Dan Weinrich Fine Minerals
Full-time professional mineral dealer with over 31 years experience in mineral collecting
And 15 years selling mineral specimens on the internet and at major mineral shows


General Coquimbite Information

Help on Chemical  Formula: Chemical Formula: Fe+++2(SO4)3•9(H2O)
Help on Composition: Composition: Molecular Weight = 562.02 gm
   Iron      19.87 %  Fe   28.41 % Fe2O3
   Hydrogen   3.23 %  H    28.85 % H2O
   Sulfur    17.12 %  S    42.74 % SO3
   Oxygen    59.78 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+2(SO4)3•9(H2O)
Help on Environment: Environment: Water soluble efflorescence commonly produced by mine fires or other oxidation with iron sulfide minerals. Dimorphous with paracoquimbite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Coquimbo province, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Coquimbite + Pronunciation Say COQUIMBITE
Help on Synonym: Synonym: ICSD 15182
  PDF 44-1425
 

Coquimbite Image

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

Coquimbite

Comments: Brownish yellow tabular crystals of coquimbite.
Location: Lavender Pit, Bisbee, Cochise County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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

Coquimbite   Goldichite   Ferricopiapite

Comments: Prismatic to fibrous crystals of goldichite on white massive coquimbite with yellow ferricopiapite.
Location: Dexter No. 7 Mine, Calf Mesa, San Rafael Swell, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

Coquimbite

Comments: Coquimbite rosettes (small bumps) secondarily nucleated on a cryptocrystalline mass. AmMin, v90, p1734.
Location: Vents associated with underground coal fires in the Wuda coal bed of Inner Mongolia. Scale: See Image.
© American Mineralogist

Coquimbite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.56418
Help on Cell Dimensions: Cell Dimensions: a = 10.922, c = 17.084, Z = 4; V = 1,764.92 Den(Calc)= 2.12
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.26(1), 2.759(0.75), 5.45(0.65),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 1 1 0) ( 0 1 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Click Here for Large Coquimbite Structure Window 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


Fang J H , Robinson P D , American Mineralogist , 55 (1970) p.1534-1540, Crystal structures and mineral chemistry of hydrated ferric sulfates. I. The, crystal structure of coquimbite

View Additional jPOWD Structure files for Coquimbite
[1]
 

Physical Properties of Coquimbite

Help on Cleavage: Cleavage: {1011} Imperfect
Help on Color: Color: Greenish white, Bluish white, Light violet, Yellowish white, Brownish white.
Help on Density: Density: 2 - 2.1, Average = 2.04
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Coquimbite

Help on Dichroism (e): Dichroism (e): none.
Help on Dichroism (w): Dichroism (w): none.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2611,KPDmeas= 0.27,KC= 0.2632
Ncalc = 1.53 - 1.56
Help on Optical Data: Optical Data: Uniaxial (+), w=1.55, e=1.557, bire=0.0070.
 

Calculated Properties of Coquimbite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.16 gm/cc
note: Specific Gravity of Coquimbite =2.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.005788726
Boson Index = 0.994211274
Help on Photoelectric: Photoelectric: PECoquimbite = 6.81 barns/electron
U=PECoquimbite x rElectron Density= 14.70 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coquimbite is Not Radioactive
 

Coquimbite Classification

Help on  Dana Class: Dana Class: 29.08.03.01 (29)Hydrated Acid and Sulfates
  (29.08)where (A)2 (XO4)3 · x(H2O)
  (29.08.03)Dana Group
 
29.08.03.01 Coquimbite Fe2(SO4)3•9(H2O) P 3c 3 2/m
Help on  Strunz Class: Strunz Class: 07.CB.50 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
 
07.CB.50 Coquimbite Fe2(SO4)3•9(H2O) P 3c 3 2/m
 
07.CB.50 Paracoquimbite Fe2(SO4)3•9(H2O) R 3 3
 

Other Coquimbite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Coquimbite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Coquimbite using:

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

Visit our Advertisers for Coquimbite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Coquimbite Mineral Data :

Ask about Coquimbite 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 Coquimbite Specimen Label here :

Coquimbite

Fe+++2(SO4)3•9(H2O)
Dana No: 29.08.03.01 Strunz No: 07.CB.50
Locality:

 

Notes: