Mineralogy Database

Ertixiite Mineral Data

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General Ertixiite Information

Help on Chemical  Formula: Chemical Formula: Na2Si4O9
Help on Composition: Composition: Molecular Weight = 302.32 gm
   Sodium   15.21 %  Na   20.50 % Na2O
   Silicon  37.16 %  Si   79.50 % SiO2
   Oxygen   47.63 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Si4O9
Help on Environment: Environment: Miarolytic cavities in Ta-Nb-Be pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Altai No. 3 pegmatite, Ertixi River, Fuyun, Xinjiang Autonomous Region, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Ertixiite + Pronunciation Say ERTIXIITE

Ertixiite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.975, Z = 1; V = 213.31 Den(Calc)= 2.35
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.798(1), 1.996(0.8), 3.443(0.2),

Physical Properties of Ertixiite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.35
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 5.8-6.5
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Ertixiite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2136,KPDmeas= 0.2136,KC= 0.2043
Ncalc = 1.48
Help on Optical Data: Optical Data: Isotropic, n=1.502.

Calculated Properties of Ertixiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.33 gm/cc
note: Specific Gravity of Ertixiite =2.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEErtixiite = 1.67 barns/electron
U=PEErtixiite x rElectron Density= 3.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ertixiite is Not Radioactive

Ertixiite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.03)Dana Group Ertixiite Na2Si4O9 P a3 2/m 3
Help on  Strunz Class: Strunz Class: 09.HA.05 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HA -With alkali and alkali-earth Elements
09.HA.05 Ertixiite Na2Si4O9 P a3 2/m 3

Other Ertixiite 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 Ertixiite :
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.HA.05





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