Gaultite Mineral Data

General Gaultite Information

Chemical Formula:

Na4Zn2Si7O18•5(H2O)

Composition:

Molecular Weight = 797.40 gm

Sodium 11.53 % Na 15.55 % Na₂O

Zinc 16.40 % Zn 20.41 % ZnO

Silicon 24.65 % Si 52.74 % SiO₂

Hydrogen 1.26 % H 11.30 % H₂O

Oxygen 46.15 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄Zn₂Si₇O₁₈•5(H₂O)

Environment:

In a cavity in a sodalite syenite xenolith near a contact of hornfels and nepheline-sodalite syenite.

IMA Status:

Approved IMA 1994

Locality:

Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

Named after Robert Allan Gault (1943- ) of the Canadian Museum of Nature.

Name Pronunciation:

Gaultite

Synonym:

ICSD 79160

IMA1992-040

PDF 46-563

Gaultite Crystallography

Axial Ratios:

a:b:c =0.256:1:0.2583

Cell Dimensions:

a = 10.211, b = 39.88, c = 10.304, Z = 8; V = 4,195.94 Den(Calc)= 2.52

Crystal System:

Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F2dd

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.35(1), 3.24(0.6), 3.167(0.4),

Physical Properties of Gaultite

Cleavage:

{101} Perfect, {010} Perfect, {021} Poor

Color:

Colorless, Pale mauve.

Density:

2.52

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

6 - Orthoclase

Luminescence:

Fluorescent, Short UV=bright apple green.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Gaultite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.207,KPDmeas= 0.207,KC= 0.2099
Ncalc = 1.53

Optical Data:

Biaxial (+), a=1.52, b=1.521, g=1.524, bire=0.0040, 2V(Calc)=62, 2V(Meas)=61.3. Dispersion weak to moderate, r > v.

Calculated Properties of Gaultite

Electron Density:

Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Gaultite =2.52 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Gaultite= 9.06 barns/electron
U=PE_Gaultite x rElectron Density= 22.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gaultite is Not Radioactive

Gaultite Classification

Dana Class:

77.02.06.01 (77)Tectosilicate Zeolite group

(77.02)related species

(77.02.06)Dana Group

77.02.06.01 Gaultite Na4Zn2Si7O18•5(H2O) F2dd mm2

Strunz Class:

09.GF.20 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GF -Other Rare Zeolites

09.GF.20 Gaultite Na4Zn2Si7O18•5(H2O) F2dd mm2

Other Gaultite Information

References:

NAME( MinRec) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Gaultite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

Search for Gaultite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Gaultite :

Ask about Gaultite 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 Español

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

Gaultite

Na4Zn2Si7O18•5(H2O)
Dana No: 77.02.06.01 Strunz No: 09.GF.20
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.