Coesite  Mineral Data

Coesite Mineral Data

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

Advertisment
Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.
Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.
Adamsminerals.com- Online mineral store front for mineral collectors
For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

General Coesite Information

Help on Chemical  Formula: Chemical Formula: SiO2
Help on Composition: Composition: Molecular Weight = 60.08 gm
   Silicon  46.74 %  Si  100.00 % SiO2
   Oxygen   53.26 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (SiO2)
Help on Environment: Environment: High temperature and high pressure polymorph of quartz (500-800 deg C, ~ 30-35 kbar). Formed in impact craters and ultra-high-pressure eclogite rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Metor Crater, Cononino County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Loring Coes, Jr. (1915-1973), American chemist, Norton Company, who first synthesized the phase.
Help on Synonym: Synonym: ICSD 18112
  PDF 14-654
 

Coesite Image

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

Coesite

Comments: Fine-grained, massive coesite.
Location: Meteor Crater, Canyon Diablo, Coconino County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

Coesite

Comments: Coesite inclusion in garnet of eclogite sample (Eur. J. Mineral, 13:567).
Location: Ultra high-pressure metamorphic area of the Saidenbach reservoir, Erzgebirge, Germany, where micro-diamond-bearing gneiss occurs. Scale: Scale Bar 50 µm.
© Eur. J. Mineral

Coesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5791:1:0.5791
Help on Cell Dimensions: Cell Dimensions: a = 7.17, b = 12.38, c = 7.17, Z = 16; beta = 120° V = 551.18 Den(Calc)= 2.90
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.098(1), 3.432(0.5), 2.77(0.15),
Click Here for Large Coesite 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


Levien L , Prewitt C T , American Mineralogist , 66 (1981) p.324-333, High-pressure crystal structure and compressibility of coesite, P = 1 atm isotropic refinement

View Additional jPOWD Structure files for Coesite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [3] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Coesite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.93
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Coesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2055,KPDmeas= 0.2034,KC= 0.208
Ncalc = 1.6 - 1.61
Help on Optical Data: Optical Data: Biaxial (+), a=1.593-1.594, b=1.595, g=1.599, bire=0.0050-0.0060, 2V(Calc)=54-72, 2V(Meas)=54-64. Dispersion r < v weak.
 

Calculated Properties of Coesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.90 gm/cc
note: Specific Gravity of Coesite =2.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PECoesite = 1.80 barns/electron
U=PECoesite x rElectron Density= 5.20 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coesite is Not Radioactive
 

Coesite Classification

Help on  Dana Class: Dana Class: 75.01.04.01 (75)Tectosilicate Si Tetrahedral Frameworks
  (75.01)SiO2 with [4] coordinated Si
  (75.01.04)Dana Group
 
75.01.04.01 Coesite SiO2 C 2/c 2/m
 
75.01.04.02 Moganite! SiO2 I2/a 2/m
Help on  Strunz Class: Strunz Class: 04.DA.35 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DA -With small cations
 
04.DA.35 Coesite SiO2 C 2/c 2/m
 

Other Coesite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Coesite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineral and Gemstone Kingdom
13 - Mineralienatlas (Deutsch)
14 - Minerals in Thin Section-University of North Carolina
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

Search for Coesite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Coesite :

A Bijoux Google Search for Coesite
Adam's Minerals Google Search for Coesite
Cape Minerals Google Search for Coesite
Dakota Matrix Minerals Google Search for Coesite
Excalibur Mineral Corp. Google Search for Coesite
Exceptional Minerals Google Search for Coesite
John Betts Fine Minerals Search for Coesite
McDougall Minerals Google Search for Coesite
Mineral News Website Link
Rock and Mineral Shows Google Search for Coesite
Weinrich Minerals, Inc. Google Search for Coesite

Ask about Coesite 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 Coesite Specimen Label here :

Coesite

SiO2
Dana No: 75.01.04.01 Strunz No: 04.DA.35
Locality:

 

Notes: