Gaidonnayite Mineral Data

Gaidonnayite Mineral Data
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General Gaidonnayite Information

Help on Chemical Formula: Chemical Formula: Na2ZrSi3O9•2(H2O)
Help on Composition: Composition: Molecular Weight = 401.49 gm
   Sodium     11.45 %  Na   15.44 % Na2O
   Zirconium  22.72 %  Zr   30.69 % ZrO2
   Silicon    20.99 %  Si   44.90 % SiO2
   Hydrogen    1.00 %  H     8.97 % H2O
   Oxygen     43.84 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2ZrSi3O9•2(H2O)
Help on Environment: Environment: Altered pegmatites and miarolitic cavites in nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Mt St. Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gabrielle Hamburger Donnay (1920-1987), crystallographer and mineralogist, McGill University.
Help on Name Pronunciation: Name Pronunciation: Gaidonnayite + Pronunciation Say GAIDONNAYITE
Help on Synonym: Synonym: ICSD 201846
  IMA1973-003
  PDF 26-1387
 

Gaidonnayite Image

Click Here for Larger Gaidonnayite Image in a New Browser Window Images:
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Gaidonnayite

Comments: Translucent tan spherical gaidonnayite crystal aggregates.
Location: Mont Saint Hilaire, Rouville County, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gaidonnayite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9157:1:0.5219
Help on Cell Dimensions: Cell Dimensions: a = 11.74, b = 12.82, c = 6.691, Z = 4; V = 1,007.04 Den(Calc)= 2.65
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P 21nb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.124(1), 5.84(0.8), 5.93(0.8),
Click Here for Large Gaidonnayite Structure Window Crystal Structure:

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Chao G Y , The Canadian Mineralogist , 23 (1985) p.11-15, The crystal structure of gaidonnayite Na2ZrSi3O9.2H2O

 

Physical Properties of Gaidonnayite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White, Light lilac.
Help on Density: Density: 2.67
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Fluorescent, Short UV=bright green, Long UV=bright green.
Help on Streak: Streak: white
 

Optical Properties of Gaidonnayite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2219,KPDmeas= 0.2202,KC= 0.218
Ncalc = 1.58
Help on Optical Data: Optical Data: Biaxial (+), a=1.573, b=1.592, g=1.599, bire=0.0260
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Gaidonnayite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.61 gm/cc
note: Specific Gravity of Gaidonnayite =2.67 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEGaidonnayite = 30.94 barns/electron
U=PEGaidonnayite x rElectron Density= 80.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gaidonnayite is Not Radioactive
 

Gaidonnayite Classification
Help on Dana Class: Dana Class: 59.02.02.03 (59)Cyclosilicate Three-Membered Rings
  (59.02)hydrated
  (59.02.02)Catapleiite group
 
59.02.02.01 Catapleiite (Na,Ca,[])2ZrSi3O9•2(H2O) B2/b (pseudo-HEX) 2/m
 
59.02.02.02 Calciocatapleiite (Ca,[])ZrSi3O9•2(H2O) Pbnn 2/m 2/m 2/m
 
59.02.02.03 Gaidonnayite Na2ZrSi3O9•2(H2O) P 21nb mm2
 
59.02.02.04 Georgechaoite KNaZrSi3O9•2(H2O) P 21nb mm2
 
59.02.02.05 Loudounite NaCa5Zr4Si16O40(OH)11•8(H2O) Mono
 
59.02.02.06 Bobtraillite! (Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12•12H2O P 3c1 3 2/m
Help on Strunz Class: Strunz Class: 09.DM.15 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DM -Inosilicates with 6-periodic single chains
 
09.DM.15 Gaidonnayite Na2ZrSi3O9•2(H2O) P 21nb mm2
 
09.DM.15 Georgechaoite KNaZrSi3O9•2(H2O) P 21nb mm2
 

Other Gaidonnayite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Gaidonnayite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Gaidonnayite

Na2ZrSi3O9•2(H2O)
Dana No: 59.02.02.03 Strunz No: 09.DM.15
Locality:

 

Notes: