Iriginite Mineral Data

General Iriginite Information

Chemical Formula:

(UO2)(Mo++++++2O7)•3(H2O)

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

Empirical Formula:

(UO₂)Mo₂O₇•3(H₂O)

Environment:

Most abundant secondary minerals in the oxidized zones of hydrothermal U-Mo deposits.

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

U-Mo deposit of the Alexandrovskii mine, Udokan Range, northern Zabaikal’e, Russia. Link to MinDat.org Location Data.

Name Origin:

Unknown origin.

Name Pronunciation:

Iriginite + Pronunciation

Synonym:

ICSD 89898

PDF 29-1372

Iriginite Image

Images:

Iriginite

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

Images:

Iriginite Mourite

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

Axial Ratios:

a:b:c =0.5266:1:0.9051

Cell Dimensions:

a = 6.705, b = 12.731, c = 11.524, Z = 4; V = 983.70 Den(Calc)= 4.24

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbcm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.21(1), 6.35(1), 2.621(0.55),

Crystal Structure:

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Krivovichev S V , Burns P C , The Canadian Mineralogist , 38 (2000) p.847-851, The crystal chemistry of uranyl molybdates. II. the crystal structure, of iriginite

Physical Properties of Iriginite

Cleavage:

None

Color:

Canary yellow.

Density:

3.84

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

1-2 - Between Talc and Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

light yellow

Optical Properties of Iriginite

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

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

Electron Density:

Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Iriginite =4.24 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Iriginite=1,024.08 barns/electron
U=PE_Iriginite x r_electron=3,844.61 barns/cc.

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
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr 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

Dana Class:

49.02.03.01 (49)Basic and Hydrated Molybdates and Tungstates

(49.02)(Hydrated)

(49.02.03)Dana Group

49.02.03.01 Iriginite (UO2)(Mo2O7)•3(H2O) Pbcm 2/m 2/m 2/m

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

References:

NAME( CanMin, v 38, p 487) PHYS. PROP.(AmMin, vol 86, p 770) OPTIC PROP.(Dana8)

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

Iriginite

(UO2)(Mo++++++2O7)•3(H2O)
Dana No: 49.02.03.01 Strunz No: 04.GB.60
Locality:

Notes: