Mineralogy Database

Gottardiite Mineral Data

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General Gottardiite Information

Help on Chemical  Formula: Chemical Formula: Na3Mg3Ca5Al19Si117O272•93(H2O)
Help on Composition: Composition: Molecular Weight = 10168.18 gm
   Sodium      0.68 %  Na    0.91 % Na2O
   Calcium     1.97 %  Ca    2.76 % CaO
   Magnesium   0.72 %  Mg    1.19 % MgO
   Aluminum    5.04 %  Al    9.53 % Al2O3
   Silicon    32.32 %  Si   69.14 % SiO2
   Hydrogen    1.84 %  H    16.48 % H2O
   Oxygen     57.43 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Mg3Ca5Al19Si117O272•93(H2O)
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Mt. Adamson, Victoria Land, Antarctica. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Professor Glauco Gottardi (1928-1988), University of Modena, in recognition of his pioneering work on the structure and crystal chemistry of natural zeolites.
Help on Name Pronunciation: Name Pronunciation: Gottardiite + Pronunciation Say GOTTARDIITE
Help on Synonym: Synonym: ICSD 81390
  PDF 48-1814

Gottardiite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5432:1:0.8987
Help on Cell Dimensions: Cell Dimensions: a = 13.698, b = 25.213, c = 22.66, Z = 1; V = 7,826.03 Den(Calc)= 2.16
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.34(1), 4.37(0.79), 4.01(0.57),

Physical Properties of Gottardiite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 2.14
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Gottardiite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2239,KPDmeas= 0.226,KC= 0.2294
Ncalc = 1.49 - 1.5
Help on Optical Data: Optical Data: Biaxial (-), a=1.48, b=1.485, g=1.486, bire=0.0060

Calculated Properties of Gottardiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.17 gm/cc
note: Specific Gravity of Gottardiite =2.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGottardiite = 1.69 barns/electron
U=PEGottardiite x rElectron Density= 3.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gottardiite is Not Radioactive

Gottardiite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.06)Mordenite and related species Mordenite (Ca,Na2,K2)Al2Si10O24•7(H2O) C mc21 mm2 Epistilbite CaAl2Si6O16•5(H2O) C1 1 Maricopaite Pb7Ca2(Si,Al)48O100•32(H2O) Cm2m 2/m 2/m 2/m Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96•25(H2O) C 2/m 2/m Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48•13(H2O) C 2/m 2/m Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m Ferrierite-K! (K,Na)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36•9(H2O) P 21/n 2/m Boggsite NaCa2(Al5Si19O48)•17(H2O) I mma 2/m 2/m 2/m Gottardiite! Na3Mg3Ca5Al19Si117O272•93(H2O) C mca 2/m 2/m 2/m Terranovaite! (Na,Ca)8(Si68Al12)O160•29(H2O) C mcm 2/m 2/m 2/m Mutinaite! Na3Ca4Si85Al11O192•60(H2O) P nma 2/m 2/m 2/m Direnzoite! NaK6MgCa2(Al13Si47O120)•36H2O Pmmn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.GF.10 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GF -Other Rare Zeolites
09.GF.10 Gottardiite! Na3Mg3Ca5Al19Si117O272•93(H2O) C mca 2/m 2/m 2/m

Other Gottardiite Information

Help on References: References: NAME( CanMin, v 35, p 1584) PHYS. PROP.(Eur. J. Min.,Vol.8,p687-693,1996) OPTIC PROP.(Eur. J. Min.,Vol.8,p687-693,1996)
Help on See Also: See Also: Links to other databases for Gottardiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.GF.10





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