Hügelite	IMA-GP
Uranium	42.4.5.2 (Dana Classification Number)
(No Images)	7/E.07-100 (Strunz ID)

Property	Data	Remarks
Named for:
Alternate     Name(s):
Mineral Class:	Phosphates, Arsenates and Vanadates   Uranylphosphates and uranylvanadates with [UO2]+2 - [PO4 | AsO4]-3 and [UO2]+2 - [V2O8]-6     Phosphuranylite series
Chemical     Formula:	Pb2(UO2)3(AsO4)2(OH)4 · 3H2O
Chemical     Composition:	Arsenic: (As) 9.22% Hydrogen: (H) 0.62% Lead: (Pb) 25.51% Oxygen: (O) 20.68% Uranium: (U) 43.96%	by weight
Molecular     Weight:	1,624.40	daltons (amu)
Specific     Radioactivity:	(All radiation is for a 1 gram, fully aged specimen) Specific Activity Dose Rate Becquerels Curies milliRems/hour microSieverts/hour 7.8689 × 1004 2.13 × 10-06 1.04 103.75 Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
Crystalography:	System: Monoclinic - Prismatic Axial Ratios: a: 0.4707 b: 1 c: 0.4059 Cell Dimensions: a: 8.13 Å b: 17.27 Å c: 7.01 Å Z: 2 b: 109° V: 930.62 Å3 DenCalc: 5.80 H-M Symbol: 2/m Space Group: P21/m X-Ray Diffraction:   By Intensity ( I/Io ) (1):   Å (0.):   Å (0.):   Å
Habit:
Cleavage:	[001]   [010]   [100]
Fracture:
Moh's     Hardness:	2 - 3
Density:	5.1	grams/cm3
Color:	Brown-yellow, Orange-yellow
Streak:	Pale yellow
Luster:	Adamantine - Greasy
Diaphaneity:	Transparent to Translucent
Pleochroism:	(x):   (y:)   (z:)
Ultra Violet     Fluorescence:	Long Wave:   Short Wave:
Magnetism:	Non-magnetic
Occurance:
Associated     Minerals:	Arsenic, Chalcopyrite, Copper, Covellite, Galena, Greenockite, Hallimondite, Kasolite, Marcasite, Metaheinrichite, Novácekite, Pyrite, Silver, Sphalerite, Zeunerite Minerals   -   Uranium & Thorium mineral links	These are minerals known to be found with Hügelite
Localities:	Extremely rare Hügelite Localities
Notes:	Radioactive a- and b-particles, g-rays. Crystals are probably metamic.