Cowlesite Mineral Data (original) (raw)

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

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

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:

OrthorhombicSpace 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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Ask about Cowlesite here :
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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: