Sharpite	IMA-GP
Uranium	16b.7.10.1 (Dana Classification Number)
(No Images)	5/F.04-20 (Strunz ID)

Property	Data	Remarks
Named for:	R. R. Sharp (1881-1956), English engineer, prospector, and soldier, who discovered the Shikolobwe uranium deposit in 1915
Alternate     Name(s):
Mineral Class:	Nitrates, Carbonates and Borates   Uranylcarbonates ([UO2]+2 - [CO3]-2)     Urancalcarite - Albrechtschraufite series
Chemical     Formula:	Ca(UO2)6(CO3)5(OH)4 · 6H2O (crystals may contain particles of black cobalt oxide)
Chemical     Composition:	Carbon: (C) 2.81% Calcium: (Ca) 1.88% Hydrogen: (H) 0.75% Oxygen: (O) 27.71% Uranium: (U) 66.85%	by weight
Molecular     Weight:	2,136.41	daltons (amu)
Specific     Radioactivity:	(All radiation is for a 1 gram, fully aged specimen) Specific Activity Dose Rate Becquerels Curies milliRems/hour microSieverts/hour 1.19660 × 1005 3.23 × 10-06 1.60 160.29 Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
Crystalography:	System: Orthorhombic Axial Ratios: a: 1.4069 b: 1 c: 0.287 Cell Dimensions: a: 21.99 Å b: 15.63 Å c: 4.487 Å Z: 2 V: 1,542.20 Å3 DenCalc: 4.60 H-M Symbol:   Space Group:   X-Ray Diffraction:   By Intensity ( I/Io ) (1): 4.497 Å (0.48): 3.91 Å (0.4): 7.82 Å
Habit:	Acicular crystals Radial clusters Encrustations
Cleavage:	[001]   [010]   [100]
Fracture:
Moh's     Hardness:	2.5
Density:	4.45	grams/cm3
Color:	Greenish yellow
Streak:
Luster:
Diaphaneity:
Pleochroism:	(x): None to brownish (y:) None (z:) None to light greenish-yellow	Apparently variable with sample
Ultra Violet     Fluorescence:	Long Wave:   Short Wave:
Magnetism:	Non-magnetic
Occurance:
Associated     Minerals:	Barite, Becquerelite, Billietite, Chalcopyrite, Coffinite, Curite, Dewindtite, Fluorite, Kasolite, Metazeunerite, Parsonsite, Pitchblende, Pyrite, Quartz, Rutherfordine, Schoepite, Sklodowskite, Uraninite, Uranophane, Wolsendorfite, Zeunerite Mineral   -   all sites Mineral   -   > 75% of sites Mineral   -   > 50% of sites Minerals   -   Uranium & Thorium mineral links	These are minerals known to be found with Sharpite
Locations:	Very rare Sharpite Locations
Notes:	Strongly radioactive a- and b-particles, g-rays. Crystals are probably metamic. Birefringence is high (0.09). Original (type) specimens at the University of Liége were destroyed during World War II.