Gottardiite Mineral Data (original) (raw)
General Gottardiite Information
Chemical Formula:
Na3Mg3Ca5Al19Si117O272•93(H2O)
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
Empirical Formula:
Na3Mg3Ca5Al19Si117O272•93(H2O)
IMA Status:
Approved IMA 1996 (Dana # Added)
Locality:
Mt. Adamson, Victoria Land, Antarctica. Link to MinDat.org Location Data.
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.
Name Pronunciation:
Gottardiite + Pronunciation 
Synonym:
ICSD 81390
IMA1994-054
PDF 48-1814
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Gottardiite Crystallography
Axial Ratios:
a:b:c =0.5432:1:0.8987
Cell Dimensions:
a = 13.698, b = 25.213, c = 22.66, Z = 1; V = 7,826.03 Den(Calc)= 2.16
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mca
X Ray Diffraction:
By Intensity(I/Io): 11.34(1), 4.37(0.79), 4.01(0.57),
Crystal Structure:
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| | Alberti A , Vezzalini G , Galli E , Quartieri S , European Journal of Mineralogy , 8 (1996) p.69-75, The crystal structure of gottardiite, a new natural zeolite, Note: occupancies altered to match chemical formula | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
Physical Properties of Gottardiite
Cleavage:
{001} Perfect
Color:
Colorless.
Density:
2.14
Diaphaneity:
Transparent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Gottardiite
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
Optical Data:
Biaxial (-), a=1.48, b=1.485, g=1.486, bire=0.0060
Calculated Properties of Gottardiite
Electron Density:
Bulk Density (Electron Density)=2.17 gm/cc
note: Specific Gravity of Gottardiite =2.14 gm/cc.
Fermion Index:
Fermion Index = 0.01
Boson Index = 0.99
Photoelectric:
PEGottardiite = 1.69 barns/electron
U=PEGottardiite x rElectron Density= 3.67 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gottardiite is Not Radioactive
Gottardiite Classification
Dana Class:
77.01.06.08 (77)Tectosilicate Zeolite group
(77.01)true zeolites
(77.01.06)Mordenite and related species
77.01.06.01 Mordenite (Ca,Na2,K2)Al2Si10O24•7(H2O) C mc21 mm2
77.01.06.02 Epistilbite CaAl2Si6O16•5(H2O) C1 1
77.01.06.03 Maricopaite Pb7Ca2(Si,Al)48O100•32(H2O) Cm2m 2/m 2/m 2/m
77.01.06.04 Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96•25(H2O) C 2/m 2/m
77.01.06.05 Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48•13(H2O) C 2/m 2/m
77.01.06.06 Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m
77.01.06.06a Ferrierite-K! (K,Na)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m
77.01.06.06b Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36•9(H2O) P 21/n 2/m
77.01.06.07 Boggsite NaCa2(Al5Si19O48)•17(H2O) I mma 2/m 2/m 2/m
77.01.06.08 Gottardiite! Na3Mg3Ca5Al19Si117O272•93(H2O) C mca 2/m 2/m 2/m
77.01.06.09 Terranovaite! (Na,Ca)8(Si68Al12)O160•29(H2O) C mcm 2/m 2/m 2/m
77.01.06.10 Mutinaite! Na3Ca4Si85Al11O192•60(H2O) P nma 2/m 2/m 2/m
77.01.06.12 Direnzoite! NaK6MgCa2(Al13Si47O120)•36H2O Pmmn 2/m 2/m 2/m
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
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)
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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Print or Cut-and-Paste your Gottardiite Specimen Label here :
Gottardiite
Na3Mg3Ca5Al19Si117O272•93(H2O)
Dana No: 77.01.06.08 Strunz No: 09.GF.10
Locality:
Notes: