Bassetite	IMA-GP
Uranium	40.2a.16.1 (Dana Classification Number)
(No Images)	7/E.02-20 (Strunz ID)

Property	Data	Remarks
Named for:	Basset Mines, Redruth, Corwall, England, its type locality
Alternate     Name(s):	Iron uralite Kithilite
Mineral Class:	Phosphates, Arsenates and Vanadates   Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-     Meta-autunite group
Chemical     Formula:	Fe2+(UO2)2(PO4)2 · 8H2O
Chemical     Composition:	Hydrogen: (H) 1.73% Iron: (Fe) 6.01% Oxygen: (O) 34.41% Phosphorus: (P) 6.66% Uranium: (U) 51.19%	by weight
Molecular     Weight:	929.97	daltons (amu)
Specific     Radioactivity:	(All radiation is for a 1 gram, fully aged specimen) Specific Activity Dose Rate Becquerels Curies milliRADs per hour microSieverts 9.1632 × 1004 2.48 × 10-06 1.28 12.83 Estimated Average Annual Exposure: 3.6 RAD (3.6 centiSieverts)
Crystalography:	System: Monoclinic - Prismatic Axial Ratios: a: 0.4089 b: 1 c: 0.4106 Cell Dimensions: a: 6.98 Å b: 17.07 Å c: 7.01 Å Z: 2 b: 90.53° V: 835.20 Å3 DenCalc: 3.70 H-M Symbol: 2/m Space Group: P21/m X-Ray Diffraction:   By Intensity ( I/Io ) (1): 8.616 Å (0.96): 2.2162 Å (0.76): 3.4818 Å
Habit:
Cleavage:	[001]   [010] Perfect [100]
Fracture:
Moh's     Hardness:	2.5
Density:	3.4 - 3.63	grams/cm3
Color:	Bronze, brownish yellow, greenish brown, yellow, or olive green
Streak:	Greenish white
Luster:	Vitreous
Diaphaneity:	Transparent
Pleochroism:	(x):   (y:)   (z:)
Ultra Violet     Fluorescence:	Long Wave:   Short Wave:
Magnetism:	Non-magnetic
Occurance:	Secondary mineral occurring in the oxidation zone of uranium-bearing hydrothermal mineral deposits
Associated     Minerals:	Arsenopyrite, Autunite, Barite, Becquerelite, Bismuth, Bornite, Calcite, Chalcocite, Chalcopyrite, Coffinite, Copper, Curite, Dewindtite, Fluorite, Galena, Goethite, Hematite, Ianthinite, Kasolite, Lepidocrocite, 'Limonite', Malachite, Marcasite, Meta-Autunite, Metatorbernite, Phosphuranylite, Pyrite, Quartz, Sabugalite, Salèeite, Sphalerite, Torbernite, Uraninite, Pitchblende, Uranocircite, Uranophane, Uranopilite, Zeunerite, Zippeite Mineral   -   > 65% of sites Mineral   -   > 50% of sites Mineral   -   > 25% of sites Minerals   -   Uranium & Thorium mineral links	These are minerals known to be found with Bassetite
Localities:	Very rare Bassetite Localities
Notes:	Strongly radioactive a- and b-particles, g-rays. Crystals are probably metamic.