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Cowlesite Mineral Data

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General Cowlesite Information

Help on Chemical  Formula: Chemical Formula: CaAl2Si3O10•5-6(H2O)
Help on Composition: Composition: Molecular Weight = 446.38 gm
   Calcium    8.98 %  Ca   12.56 % CaO
   Aluminum  12.09 %  Al   22.84 % Al2O3
   Silicon   18.88 %  Si   40.38 % SiO2
   Hydrogen   2.71 %  H    24.21 % H2O
   Oxygen    57.35 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl2Si3O10•6(H2O)
Help on Environment: Environment: A low-silica zeolite from hydrothermal solutions in low-silica rocks.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Neer Road, N of Goble, Columbia County, Oregon, USA> Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John George Cowles (1907-1985), American amateur mineralogist and zeolite collector.
Help on Name Pronunciation: Name Pronunciation: Cowlesite + Pronunciation Say COWLESITE
Help on Synonym: Synonym: IMA1975-016
 

Cowlesite Image

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  Cowlesite

Comments: Milky bluish translucent botryoidal cowlesite in vug.
Location: Goble, Columbia County, Oregon, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cowlesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.759:1:0.815
Help on Cell Dimensions: Cell Dimensions: a = 23.249, b = 30.629, c = 24.964, Z = 52; V = 17,776.71 Den(Calc)= 2.17
Help on Crystal System: Crystal System: Orthorhombic Space Group: P 2221, P mmm, Pmm2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 15.2(1), 2.964(0.35), 3.81(0.35),
 

Physical Properties of Cowlesite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Colorless, Gray white, White.
Help on Density: Density: 2.14
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Cowlesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2358,KPDmeas= 0.2391,KC= 0.24
Ncalc = 1.51 - 1.52
Help on Optical Data: Optical Data: Biaxial (-), a=1.505-1.513, b=1.509-1.516, g=1.509-1.518, bire=0.0040-0.0050
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Cowlesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.19 gm/cc
note: Specific Gravity of Cowlesite =2.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0092153401
Boson Index = 0.9907846599
Help on Photoelectric: Photoelectric: PECowlesite = 2.22 barns/electron
U=PECowlesite x rElectron Density= 4.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cowlesite is Not Radioactive
 

Cowlesite Classification

Help on  Dana Class: Dana Class: 77.01.05.08 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.05)Natrolite and related species
 
77.01.05.01 Natrolite Na2[Al2Si3O10]•2(H2O) F dd2 mm2
 
77.01.05.02 Tetranatrolite? Na2[Al2Si3O10]•2(H2O) I 42d 4 2m
 
77.01.05.03 Paranatrolite Na2[Al2Si3O10]•3(H2O) Cc m
 
77.01.05.04 Mesolite Na2Ca2Al6Si9O30•8(H2O) C 2 2
 
77.01.05.05 Scolecite CaAl2Si3O10•3(H2O) Cc m
 
77.01.05.06 Edingtonite BaAl2Si3O10•4(H2O) P 21212 2 2 2
 
77.01.05.07 Gonnardite Na2CaAl4Si6O20•7(H2O) I 42d 4 2m
 
77.01.05.08 Cowlesite CaAl2Si3O10•5-6(H2O) P 2221, P mmm, Pmm2 Ortho
 
77.01.05.09 Thomsonite-Ca NaCa2Al5Si5O20•6(H2O) Pncn 2/m 2/m 2/m
 
77.01.05.10 Thomsonite-Sr! (Sr,Ca)2Na[Al5Si5O20]•7(H2O) Pcnn 2/m 2/m 2/m
 
77.01.05.11 Nabesite! Na2BeSi4O10•4(H2O) P 212121 2 2 2
Help on  Strunz Class: Strunz Class: 09.GG.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GG -Unclassified zeolites
 
09.GG.05 Cowlesite CaAl2Si3O10•5-6(H2O) P 2221, P mmm, Pmm2 Ortho
 

Other Cowlesite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Cowlesite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Cowlesite

CaAl2Si3O10•5-6(H2O)
Dana No: 77.01.05.08 Strunz No: 09.GG.05
Locality:

 

Notes:

 

 
   
 


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