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Gmelinite-Na Mineral Data

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General Gmelinite-Na Information

Help on Chemical  Formula: Chemical Formula: (Na2,Ca)Al2Si4O12•6(H2O)
Help on Composition: Composition: Molecular Weight = 2,000.77 gm
   Potassium   0.31 %  K     0.38 % K2O
   Sodium      8.74 %  Na   11.79 % Na2O
   Calcium     0.06 %  Ca    0.08 % CaO
   Aluminum    9.99 %  Al   18.88 % Al2O3
   Silicon    23.15 %  Si   49.52 % SiO2
   Hydrogen    2.17 %  H    19.36 % H2O
   Oxygen     55.58 %  O
             ______        ______ 
             100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na7.61Ca0.03K0.16Al7.41Si16.49O48•21.5(H2O)
Help on Environment: Environment: Alteration product of basalts.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1825
Help on Locality: Locality: Montecchio Maggiore, Vicenza, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the German mineralogist and chemist, Christian Gottlob Gmelin (1792-1860) of Turbingen, Germany. Na modifier added by the zeolite nomenclature committee.
Help on Name Pronunciation: Name Pronunciation: Gmelinite-Na + Pronunciation Say GMELINITE-NA
Help on Synonym: Synonym: Gmelinite
 

Gmelinite-Na Image

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  Gmelinite-Na

Comments: White crystalline aggregate of gmelinite.
Location: Antrim, Northern Ireland. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gmelinite-Na Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.73044
Help on Cell Dimensions: Cell Dimensions: a = 13.756, c = 10.048, Z = 1; V = 1,646.63 Den(Calc)= 2.02
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.1(1), 12.9(0.9), 2.96(0.8),
 

Physical Properties of Gmelinite-Na

Help on Cleavage: Cleavage: {1010} Good, {0001} Parting
Help on Color: Color: White, Reddish white, Pink, Greenish white, Flesh red.
Help on Density: Density: 2.03 - 2.17, Average = 2.09
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Gmelinite-Na

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2382,KPDmeas= 0.2292,KC= 0.2312
Ncalc = 1.47 - 1.5
Help on Optical Data: Optical Data: Uniaxial (+/-), a=1.474-1.481, b=1.476-1.494, bire=0.0020-0.0130.
 

Calculated Properties of Gmelinite-Na

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.13 gm/cc
note: Specific Gravity of Gmelinite-Na =2.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGmelinite-Na = 1.40 barns/electron
U=PEGmelinite-Na x relectron= 2.98 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4.58 (Gamma Ray American Petroleum Institute Units)
Concentration of Gmelinite-Na per GRapi unit = 21.82 (%)

Estimated Radioactivity from Gmelinite-Na - barely detectable

 

Gmelinite-Na Classification

Help on  Dana Class: Dana Class: 77.01.02.06 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.02)Chabazite and related species
 
77.01.02.01 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]•12H2O P1 1
 
77.01.02.01a Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
77.01.02.01b Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
77.01.02.01c Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O) R 3m 3 2/m
 
77.01.02.02 Herschelite? (Na,Ca,K)AlSi2O6•3(H2O) R 3m 3 2/m
 
77.01.02.03 Willhendersonite KCaAl3Si3O12•5(H2O) P1 1
 
77.01.02.04 Offretite (K2,Ca,Mg)2.5Al5Si13O36•15(H2O) P 6m2 6 m2
 
77.01.02.05 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.05a Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.05b Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.06 Gmelinite-Na (Na2,Ca)Al2Si4O12•6(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.06a Gmelinite-Ca! (Ca,Na2)Al2Si4O12•6(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.06b Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)•22(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.02.07 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m
 
77.01.02.07a Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m
 
77.01.02.07b Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m
 
77.01.02.08 Levyne-Ca (Ca,Na2,K2)Al2Si4O12•6(H2O) R 3m 3 2/m
 
77.01.02.08a Levyne-Na! (Na2,Ca,K2)Al2Si4O12•6(H2O) R 3m 3 2/m
 
77.01.02.09 Tschortnerite! Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]•x(H2O),x>=20 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 09.GD.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GD -Chains of 6-membered rings � tabular zeolites
 
09.GD.05 Gmelinite-Ca! (Ca,Na2)Al2Si4O12•6(H2O) P 63/mmc 6/m 2/m 2/m
 
09.GD.05 Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)•22(H2O) P 63/mmc 6/m 2/m 2/m
 
09.GD.05 Gmelinite-Na (Na2,Ca)Al2Si4O12•6(H2O) P 63/mmc 6/m 2/m 2/m
 

Other Gmelinite-Na Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Gmelinite-Na :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Gmelinite-Na Specimen Label here :

Gmelinite-Na

(Na2,Ca)Al2Si4O12•6(H2O)
Dana No: 77.01.02.06 Strunz No: 09.GD.05
Locality:

 

Notes:

 

 
   
 


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