Irtyshite Mineral Data (original) (raw)

General Irtyshite Information

Help on Chemical Formula: Chemical Formula:

Na2(Ta,Nb)4O11

Help on Composition: Composition:

Molecular Weight = 901.74 gm

Sodium 5.10 % Na 6.87 % Na2O

Tantalum 70.23 % Ta 85.76 % Ta2O5

Niobium 5.15 % Nb 7.37 % Nb2O5

Oxygen 19.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na2Ta3.5Nb0.5O11

Help on Environment: Environment:

Granitic pegmatites.

Help on IMA Status: IMA Status:

Approved IMA 1985

Help on Locality: Locality:

Irtysh River area, eastern Kazakhstan. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for the locality.

Help on Name Pronunciation: Name Pronunciation:

Irtyshite + Pronunciation Say IRTYSHITE

Help on Synonym: Synonym:

ICSD 201714

PDF 38-391

Search for Irtyshite Images

Click Here To Search Images:

Irtyshite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:5.90113

Help on Cell Dimensions: Cell Dimensions:

a = 6.231, c = 36.77, Z = 6; V = 1,236.35 Den(Calc)= 7.27

Help on Crystal System: Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.029(1), 2.78(0.9), 3.082(0.9),

Physical Properties of Irtyshite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Colorless.

Help on Density: Density:

7.03

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Habit: Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Help on Hardness: Hardness:

7 - Quartz

Help on Luster: Luster:

Adamantine

Help on Streak: Streak:

white

Optical Properties of Irtyshite

Help on Optical Data: Optical Data:

Uniaxial (?).

NCalc= 2.18 - from Gladstone-Dale relationship (KC = 0.1623) where Ncalc=Dcalc*KC+1
NCalc= 2.14 - from Gladstone-Dale relationship (KC = 0.1623) where Ncalc=Dmeas*KC+1

Help on RL Anisotrophism: RL Anisotrophism:

Noted.

Help on RL Bireflectance: RL Bireflectance:

Noted.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Irtyshite in Air

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
486 nm 18.00 19.00
553 nm 18.60 19.50
589 nm 18.90 19.60
656 nm 18.50 18.70

Calculated Relative Intensity Colors of Irtyshite in Air

RelativeIntensity 0% 50% 100% 150% 200% 250% 300% 350% 400% 450% 490%
R1
R2

Calculated Properties of Irtyshite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=6.22 gm/cc
note: Specific Gravity of Irtyshite =7.27 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0001779607
Boson Index = 0.9998220393

Help on Photoelectric: Photoelectric:

PEIrtyshite = 853.38 barns/electron
U=PEIrtyshite x rElectron Density=5,311.44 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Irtyshite is Not Radioactive

Irtyshite Classification

Help on Dana Class: Dana Class:

08.06.02.03 (08)Multiple Oxides with Nb, Ta, and Ti

(08.06)Dana Type

(08.06.02)Calciotantite Group

08.06.02.01 Calciotantite Ca(Ta,Nb)4O11 P 6322 6 2 2

08.06.02.02 Natrotantite Na2Ta4O11 R 3-c 3 2/m

08.06.02.03 Irtyshite Na2(Ta,Nb)4O11 P 63/m 6/m

Help on Strunz Class: Strunz Class:

04.DJ.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DJ -With large (� medium-sized) cations; polyhedral frameworks

04.DJ.05 Calciotantite Ca(Ta,Nb)4O11 P 6322 6 2 2

04.DJ.05 Irtyshite Na2(Ta,Nb)4O11 P 63/m 6/m

04.DJ.05 Natrotantite Na2Ta4O11 R 3-c 3 2/m

Other Irtyshite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3)

Help on See Also: See Also:

Links to other databases for Irtyshite :
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

Search for Irtyshite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Irtyshite :

A Bijoux Google Search for Irtyshite
Adam's Minerals Google Search for Irtyshite
Cape Minerals Google Search for Irtyshite
Dakota Matrix Minerals Google Search for Irtyshite
Excalibur Mineral Corp. Google Search for Irtyshite
Exceptional Minerals Google Search for Irtyshite
John Betts Fine Minerals Search for Irtyshite
McDougall Minerals Google Search for Irtyshite
Mineral News Website Link
Rock and Mineral Shows Google Search for Irtyshite
Weinrich Minerals, Inc. Google Search for Irtyshite

Ask about Irtyshite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Irtyshite Specimen Label here :

Irtyshite

Na2(Ta,Nb)4O11
Dana No: 08.06.02.03 Strunz No: 04.DJ.05
Locality:

Notes: