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Gonnardite Mineral Data

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General Gonnardite Information

Help on Chemical  Formula: Chemical Formula: Na2CaAl4Si6O20•7(H2O)
Help on Composition: Composition: Molecular Weight = 808.59 gm
   Sodium     5.69 %  Na    7.67 % Na2O
   Calcium    4.96 %  Ca    6.94 % CaO
   Aluminum  13.35 %  Al   25.22 % Al2O3
   Silicon   20.84 %  Si   44.58 % SiO2
   Hydrogen   1.75 %  H    15.60 % H2O
   Oxygen    53.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2CaAl4Si6O20•7(H2O)
Help on Environment: Environment: Secondary mineral in basalts.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1896
Help on Locality: Locality: Gignat, Puy-de-Dome, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ferdinand Gonnard, French mineralogist, Lyons, France.
Help on Name Pronunciation: Name Pronunciation: Gonnardite + Pronunciation Say GONNARDITE
Help on Synonym: Synonym: ICSD 29522
  PDF 45-1324
  Tetranatrolite
 

Gonnardite Image

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  Gonnardite

Comments: White spherical aggregates of gonnardite on matrix.
Location: White spherical aggregates of Gonnardite on matrix. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Tetranatrolite   Gonnardite

Comments: White, pseudocubic crystals of tetranatrolite (gonnardite) on matrix.
Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gonnardite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.50128
Help on Cell Dimensions: Cell Dimensions: a = 13.21, c = 6.622, Z = 2; V = 1,155.57 Den(Calc)= 2.32
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.92(1), 5.93(0.8), 4.44(0.6),
 

Physical Properties of Gonnardite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: White.
Help on Density: Density: 2.3
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Gonnardite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2226,KPDmeas= 0.2245,KC= 0.2271
Ncalc = 1.52 - 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.514, b=1.515, g=1.52, bire=0.0060, 2V(Calc)=50, 2V(Meas)=52.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Gonnardite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.32 gm/cc
note: Specific Gravity of Gonnardite =2.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGonnardite = 1.92 barns/electron
U=PEGonnardite x rElectron Density= 4.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gonnardite is Not Radioactive
 

Gonnardite Classification

Help on  Dana Class: Dana Class: 77.01.05.07 (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.GA.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GA -Zeolites with T5O10 Units � The Fibrous Zeolites
 
09.GA.05 Gonnardite Na2CaAl4Si6O20•7(H2O) I 42d 4 2m
 
09.GA.05 Mesolite Na2Ca2Al6Si9O30•8(H2O) C 2 2
 
09.GA.05 Natrolite Na2[Al2Si3O10]•2(H2O) F dd2 mm2
 
09.GA.05 Paranatrolite Na2[Al2Si3O10]•3(H2O) Cc m
 
09.GA.05 Scolecite CaAl2Si3O10•3(H2O) Cc m
 
09.GA.05 Tetranatrolite? Na2[Al2Si3O10]•2(H2O) I 42d 4 2m
 

Other Gonnardite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Gonnardite :
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
15 - WWW-MINCRYST

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Gonnardite

Na2CaAl4Si6O20•7(H2O)
Dana No: 77.01.05.07 Strunz No: 09.GA.05
Locality:

 

Notes:

 

 
   
 


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