Iriginite	IMA-GP
Uranium	49.2.3.1 (Dana Classification Number)
(No Images)	6/G.06-40 (Strunz ID)

Property	Data	Remarks
Named for:	G. Yu. Epshtein, the author of the mineral description, gave the mineral this name just because she liked the sound of the word!
Alternate     Name(s):
Mineral Class:	Sulfates,Chromates,Molybdates and Tungstates   Uranylmolybdates with [UO2]+2 - [MoO4]-2     Deloryite - Iriginite series
Chemical     Formula:	(UO2)(Mo2O7) · 3H2O
Chemical     Composition:	Hydrogen: (H) 0.96% Molybdenum: (Mo) 30.56% Oxygen: (O) 30.57% Uranium: (U) 37.91%	by weight
Molecular     Weight:	627.95	daltons (amu)
Specific     Radioactivity:	(All radiation is for a 1 gram, fully aged specimen) Specific Activity Dose Rate Becquerels Curies milliRems/hour microSieverts/hour 6.7851 × 1004 1.83 × 10-06 0.94 94.05 Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
Crystalography:	System: Orthorhombic - Dipyramidal Axial Ratios: a: 0.5266 b: 1 c: 0.9051 Cell Dimensions: a: 6.705 Å b: 12.731 Å c: 11.524 Å Z: 4 V: 983.70 Å3 DenCalc: 4.24 H-M Symbol: 2/m 2/m 2/m Space Group: Pbcm X-Ray Diffraction:   By Intensity ( I/Io ) (1): 3.21 Å (1): 6.35 Å (0.55): 2.621 Å
Habit:	Crystalline (fine) Aggregates
Cleavage:	None
Fracture:
Moh's     Hardness:	1 - 2
Density:	3.84	grams/cm3
Color:	Canary-yellow
Streak:	Light yellow
Luster:	Vitreous - Dull
Diaphaneity:
Pleochroism:	(x):   (y:)   (z:)
Ultra Violet     Fluorescence:	Non-fluorescent
Magnetism:	Non-magnetic
Occurance:
Associated     Minerals:	Barite, Calcite, Calcurmolite, Chalcopyrite, Coffinite, Covellite, Ferrimolybdite, Galena, Gypsum, Hematite, Malachite, Meta-Autunite, Molybdenite, Phosphuranylite, Pyrite, Schoepite, Torbernite, Tyuyamunite, Umohoite, Uraninite, Uranophane, Uranophane-beta, Wulfenite, Zippeite Mineral   -   > 67% of sites Mineral   -   > 50% of sites Mineral   -   > 33% of sites Minerals   -   Uranium & Thorium mineral links	These are minerals known to be found with Iriginite
Localities:	Very Rare Iriginite Localities
Notes:	Very radioactive a- and b-particles, g-rays. Crystals are probably metamic.