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Georgechaoite Mineral Data

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General Georgechaoite Information

Help on Chemical  Formula: Chemical Formula: KNaZrSi3O9•2(H2O)
Help on Composition: Composition: Molecular Weight = 417.59 gm
   Potassium   9.36 %  K    11.28 % K2O
   Sodium      5.51 %  Na    7.42 % Na2O
   Zirconium  21.85 %  Zr   29.51 % ZrO2
   Silicon    20.18 %  Si   43.16 % SiO2
   Hydrogen    0.97 %  H     8.63 % H2O
   Oxygen     42.14 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KNaZrSi3O9•2(H2O)
Help on Environment: Environment: Found in small cavities in an alacime nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Wind Mountain laccolith, Otero County, New Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name honors Prof. George Y. Chao of Carlton University, Ottawa, Canada, for his work with Zr silicates.
Help on Name Pronunciation: Name Pronunciation: Georgechaoite + Pronunciation Say GEORGECHAOITE
Help on Synonym: Synonym: ICSD 201843
  PDF 39-315

Georgechaoite Image

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Comments: Single tan crystal of georgechaoite.
Location: Tolbachik Volcano, Kamchatka, Russia. Scale: Crystal Size 1.2 mm.
© Diederik Visser

Georgechaoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9146:1:0.5204
Help on Cell Dimensions: Cell Dimensions: a = 11.836, b = 12.94, c = 6.735, Z = 4; V = 1,031.52 Den(Calc)= 2.69
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P 21nb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.12(1), 6.46(0.73), 5.95(0.7),

Physical Properties of Georgechaoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.7
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 5 - Apatite
Help on Streak: Streak: white

Optical Properties of Georgechaoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2207,KPDmeas= 0.2199,KC= 0.2176
Ncalc = 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.578, b=1.597, g=1.606, bire=0.0280, 2V(Calc)=68, 2V(Meas)=67.

Calculated Properties of Georgechaoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Georgechaoite =2.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEGeorgechaoite = 30.58 barns/electron
U=PEGeorgechaoite x relectron= 80.68 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 131.99 (Gamma Ray American Petroleum Institute Units)
Concentration of Georgechaoite per GRapi unit = 0.76 (%)

Estimated Radioactivity from Georgechaoite - barely detectable


Georgechaoite Classification

Help on  Dana Class: Dana Class: (59)Cyclosilicate Three-Membered Rings
  (59.02.02)Catapleiite group Catapleiite (Na,Ca,[])2ZrSi3O9•2(H2O) B2/b (pseudo-HEX) 2/m Calciocatapleiite (Ca,[])ZrSi3O9•2(H2O) Pbnn 2/m 2/m 2/m Gaidonnayite Na2ZrSi3O9•2(H2O) P 21nb mm2 Georgechaoite KNaZrSi3O9•2(H2O) P 21nb mm2 Loudounite NaCa5Zr4Si16O40(OH)11•8(H2O) Mono 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 Georgechaoite Information

Help on References: References: NAME( MinRec) 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 Georgechaoite :
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

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Dana No: Strunz No: 09.DM.15





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