Coquandite Mineral Data

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



[Newest Minerals] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa, PayPal, and Mastercard are Welcomed


General Coquandite Information

Help on Chemical Formula: Chemical Formula: Sb6O8(SO4)•(H2O)
Help on Composition: Composition: Molecular Weight = 972.57 gm
   Antimony  75.11 %  Sb   89.92 % Sb2O3
   Hydrogen   0.21 %  H     1.85 % H2O
   Sulfur     3.30 %  S     8.23 % SO3
   Oxygen    21.39 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sb6O8(SO4)•(H2O)
Help on Environment: Environment: Probably produced by action of H2SO4 on stibnite, in a stibnite vein in silicified limestone
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Cetine mine, 20 km southwest of Siena, and the Pereta mine, Scansano, Tuscany, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Henri-Jean-Baptiste Coquand (1813-1881), Professor of Geology and Mineralogy, University of Marseilles, Marseilles, France
Help on Synonym: Synonym: IMA1991-024
 

Coquandite Image

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

Coquandite

Comments: Silky coquandite with stibnite.
Location: Pereta mine, Grosseto, Tuscany, Italy. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Coquandite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.384:1:0.38
Help on Cell Dimensions: Cell Dimensions: a = 11.434, b = 29.77, c = 11.314, Z = 12; alpha = 91.073°, beta = 119.245°, gamma = 92.82° V = 3,355.64 Den(Calc)= 5.77
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.092(1), 3.304(0.93), 6.81(0.67),
 

Physical Properties of Coquandite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Colorless, White.
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Coquandite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1869,KC= 0.2034
Ncalc = 2.18
Help on Optical Data: Optical Data: Biaxial (+), b=2.08, 2V(Meas)=80-85.
 

Calculated Properties of Coquandite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.09 gm/cc
note: Specific Gravity of Coquandite =5.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003502393
Boson Index = 0.9996497607
Help on Photoelectric: Photoelectric: PECoquandite = 251.19 barns/electron
U=PECoquandite x rElectron Density=1,277.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coquandite is Not Radioactive
 

Coquandite Classification
Help on Dana Class: Dana Class: 30.01.18.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.01)where (A B)m (XO4)p Zq where m:p>2:1
  (30.01.18)Dana Group
 
30.01.18.01 Coquandite Sb6O8(SO4)•(H2O) P1 1
Help on Strunz Class: Strunz Class: 07.DE.35 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DE -With only medium-sized cations; unclassified
 
07.DE.35 Coquandite Sb6O8(SO4)•(H2O) P1 1
 

Other Coquandite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)
Help on See Also: See Also: Links to other databases for Coquandite :
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

Search for Coquandite using:

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

Visit our Advertisers for Coquandite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

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 Coquandite Mineral Data :

Ask about Coquandite 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 Coquandite Specimen Label here :

Coquandite

Sb6O8(SO4)•(H2O)
Dana No: 30.01.18.01 Strunz No: 07.DE.35
Locality:

 

Notes: