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Iriginite Mineral Data

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General Iriginite Information

Help on Chemical  Formula: Chemical Formula: (UO2)(Mo++++++2O7)•3(H2O)
Help on Composition: Composition: Molecular Weight = 627.95 gm
   Uranium     37.91 %  U    43.00 % UO2
   Molybdenum  30.56 %  Mo   45.84 % MoO3
   Hydrogen     0.96 %  H     8.61 % H2O
   Oxygen      30.57 %  O
              ______        ______ 
              100.00 %       97.45 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (UO2)Mo2O7•3(H2O)
Help on Environment: Environment: Most abundant secondary minerals in the oxidized zones of hydrothermal U-Mo deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: U-Mo deposit of the Alexandrovskii mine, Udokan Range, northern Zabaikal´┐Że, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Unknown origin.
Help on Name Pronunciation: Name Pronunciation: Iriginite + Pronunciation Say IRIGINITE
Help on Synonym: Synonym: ICSD 89898
  PDF 29-1372

Iriginite Image

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Comments: Yellow aggregates of iriginite on matrix.
Location: Cameron area, Coconino County, Arizona, USA. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

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  Mourite   Iriginite

Comments: Purple to violet sub-metallic mourite coatings with yellow iriginite.
Location: 'North Caucasus', probably Kyzylsai Deposit, Chu-Ili Mountains, Balkhash, Zezkazgan, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Iriginite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5266:1:0.9051
Help on Cell Dimensions: Cell Dimensions: a = 6.705, b = 12.731, c = 11.524, Z = 4; V = 983.70 Den(Calc)= 4.24
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.21(1), 6.35(1), 2.621(0.55),

Physical Properties of Iriginite

Help on Cleavage: Cleavage: None
Help on Color: Color: Canary yellow.
Help on Density: Density: 3.84
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: light yellow

Optical Properties of Iriginite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.216 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.101 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1993,KPDmeas= 0.22,KC= 0.1809
Ncalc = 1.69 - 1.77
Help on Optical Data: Optical Data: Biaxial (-), a=1.73-1.764, b=1.82-1.889, g=1.93-1.936, bire=0.1720-0.2000, 2V(Calc)=58-90, 2V(Meas)=60.

Calculated Properties of Iriginite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Iriginite =4.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEIriginite =1,024.08 barns/electron
U=PEIriginite x relectron=3,844.61 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,860,809.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Iriginite per GRapi unit = 349.55 (PPB)

Iriginite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 10.63 ± 2.66 grams of pure Iriginite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1063.2 ±265.80 grams of pure Iriginite .

Estimated Radioactivity from Iriginite - very strong
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.67 cm 67,851,291 1.83E-03 2,860,809.93 940.54
100 gm / 3.56 cm 6,785,129 1.83E-04 286,080.99 94.05
10 gm / 1.65 cm 678,513 1.83E-05 28,608.10 9.41
1 gm / 7.67 mm 67,851 1.83E-06 2,860.81 0.94
0.1 gm / 3.56 mm 6,785 1.83E-07 286.08 0.09
0.01 gm / 1.65 mm 679 1.83E-08 28.61 0.01
0.001 gm / 0.77 mm 68 1.83E-09 2.86 0.00

Weight of pure Iriginite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.24 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Iriginite Classification

Help on  Dana Class: Dana Class: (49)Basic and Hydrated Molybdates and Tungstates
  (49.02.03)Dana Group Iriginite (UO2)(Mo2O7)•3(H2O) Pbcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.GB.60 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
04.GB.60 Iriginite (UO2)(Mo2O7)•3(H2O) Pbcm 2/m 2/m 2/m

Other Iriginite Information

Help on References: References: NAME( CanMin, v 38, p 487) PHYS. PROP.(AmMin, vol 86, p 770) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Iriginite :
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
15 - Uranium Minerals

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Dana No: Strunz No: 04.GB.60





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