General Irtyshite Information![]() Na2(Ta,Nb)4O11 |
![]() Molecular Weight = 901.74 gm |
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Sodium 5.10 % Na 6.87 % Na2O |
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Tantalum 70.23 % Ta 85.76 % Ta2O5 |
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Niobium 5.15 % Nb 7.37 % Nb2O5 |
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Oxygen 19.52 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() Na2Ta3.5Nb0.5O11 |
![]() Granitic pegmatites. |
![]() Approved IMA 1985 |
![]() Irtysh River area, eastern Kazakhstan. Link to MinDat.org Location Data. |
![]() Named for the locality. |
![]() Irtyshite + Pronunciation |
![]() ![]() ICSD 201714 |
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PDF 38-391 |
| | Search for Irtyshite Images
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| | Irtyshite Crystallography![]() a:c = 1:5.90113 |
![]() a = 6.231, c = 36.77, Z = 6; V = 1,236.35 Den(Calc)= 7.27 |
![]() Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m |
![]() By Intensity(I/Io): 3.029(1), 2.78(0.9), 3.082(0.9), |
| Physical Properties of Irtyshite![]() None |
![]() Colorless. |
![]() 7.03 |
![]() Transparent |
![]() Brittle - Uneven - Very brittle fracture producing uneven fragments. |
![]() Microscopic Crystals - Crystals visible only with microscopes. |
![]() 7 - Quartz |
![]() Adamantine |
![]() white |
| Optical Properties of Irtyshite![]() Uniaxial (?). |
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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 ![]() Noted. |
![]() Noted. |
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| Calculated Properties of Irtyshite![]() Bulk Density (Electron Density)=6.22 gm/cc |
note: Specific Gravity of Irtyshite =7.27 gm/cc. ![]() Fermion Index = 0.0001779607 |
Boson Index = 0.9998220393 ![]() PEIrtyshite = 853.38 barns/electron |
U=PEIrtyshite x rElectron Density=5,311.44 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Irtyshite is Not Radioactive | Irtyshite Classification![]() 08.06.02.03 (08)Multiple Oxides with Nb, Ta, and Ti |
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(08.06)Dana Type |
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(08.06.02)Calciotantite Group |
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![]() 04.DJ.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DJ -With large (± medium-sized) cations; polyhedral frameworks |
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| Other Irtyshite Information![]() NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3) |
![]() 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: Visit our Advertisers for Irtyshite : A Bijoux Google Search for IrtyshiteAdam'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 : Print or Cut-and-Paste your Irtyshite Specimen Label here :
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