Mineralogy Database

Gaultite Mineral Data

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General Gaultite Information

Help on Chemical  Formula: Chemical Formula: Na4Zn2Si7O18•5(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na4Zn2Si7O18•5(H2O)
Help on Environment: Environment: In a cavity in a sodalite syenite xenolith near a contact of hornfels and nepheline-sodalite syenite.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Robert Allan Gault (1943- ) of the Canadian Museum of Nature.
Help on Name Pronunciation: Name Pronunciation: Gaultite Say GAULTITE
Help on Synonym: Synonym: ICSD 79160
  PDF 46-563

Gaultite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.256:1:0.2583
Help on Cell Dimensions: Cell Dimensions: a = 10.211, b = 39.88, c = 10.304, Z = 8; V = 4,195.94 Den(Calc)= 2.52
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F2dd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.35(1), 3.24(0.6), 3.167(0.4),

Physical Properties of Gaultite

Help on Cleavage: Cleavage: {101} Perfect, {010} Perfect, {021} Poor
Help on Color: Color: Colorless, Pale mauve.
Help on Density: Density: 2.52
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Fluorescent, Short UV=bright apple green.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Gaultite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Gaultite =2.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGaultite = 9.06 barns/electron
U=PEGaultite x rElectron Density= 22.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gaultite is Not Radioactive

Gaultite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.02)related species
  (77.02.06)Dana Group Gaultite Na4Zn2Si7O18•5(H2O) F2dd mm2
Help on  Strunz Class: 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

Help on References: References: NAME( MinRec) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(MinRec)
Help on See Also: 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

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Dana No: Strunz No: 09.GF.20





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