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Sharpite

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Formula:
Ca(UO2)6(CO3)5(OH)4 · 6H2O
System:
Orthorhombic
Colour:
Greenish-yellow, ...
Hardness:
2½ - 3
Name:
Named after Major Robert Rich Sharp (Gateshead, Durham County, England, 25 September 1881 - 25 August 1960 Bulawayo), discoverer of the uranium deposit at Shinkolobwe, Zaire in 1915.
This page provides mineralogical data about Sharpite.


Classification of Sharpite

Approved, 'Grandfathered' (first described prior to 1959)
5.EA.35

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
A : UO2:CO3 > 1:1
16b.7.10.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
11.11.10

11 : Carbonates
11 : Carbonates of Cr and U

Type Occurrence of Sharpite

General Appearance of Type Material:
radially fibrous crust
Place of Conservation of Type Material:
University of Liege, Liege, Belgium, 6280, 16905.
Geological Setting of Type Material:
secondary mineral in oxide zone of hydrothermal uranium deposit.
Associated Minerals at Type Locality:

Physical Properties of Sharpite

Diaphaneity (Transparency):
Translucent
Colour:
Greenish-yellow, olive-green
Hardness (Mohs):
2½ - 3
Density:
4.61 g/cm3 (Calculated)
Comment:
measured > 4.55

Crystallography of Sharpite

Crystal System:
Orthorhombic
Cell Parameters:
a = 21.99(2) Å, b = 15.63(2) Å, c = 4.487(4) Å
Ratio:
a:b:c = 1.407 : 1 : 0.287
Unit Cell Volume:
V 1,542.20 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Occurs as crusts of thin, radiating fibers.
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.497 (100)
3.910 (48)
7.82 (40)
5.34 (35)
2.996 (33)
11.02 (30)
6.37 (28)

Optical Data of Sharpite

Type:
Biaxial (+)
RI values:
nα = 1.632 - 1.638 nγ = 1.720 - 1.722
Max Birefringence:
δ = 0.088
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak to distinct
Pleochroism:
Visible
Comments:
X = Brownish
Y (perp. laths) =
Z (elong.) = greenish yellow
Comments:
pale yellow in transmitted light

Chemical Properties of Sharpite

Formula:
Ca(UO2)6(CO3)5(OH)4 · 6H2O
All elements listed in formula:

Relationship of Sharpite to other Species

5.EA.05UM1997-24-CO:CaCuHUCa2Cu(UO2)2(CO3)2O3 · 3H2O
5.EA.10UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2O
5.EA.15WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2O
5.EA.20Oswaldpeetersite(UO2)2(CO3)(OH)2 · 4H2O
5.EA.25RoubaultiteCu2(UO2)3(CO3)2O2(OH)2•4H2O
5.EA.30Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2O
11.11.1StichtiteMg6Cr2(OH)16[CO3] · 4H2O
11.11.2Rutherfordine(UO2)CO3
11.11.3Joliotite(UO2)CO3 · nH2O
11.11.4GrimseliteK3Na(UO2)(CO3)3 · H2O
11.11.5BayleyiteMg2(UO2)(CO3)3 · 18H2O
11.11.6MetazelleriteCa(UO2)(CO3)2 · 3H2O
11.11.7ZelleriteCa(UO2)(CO3)2 · 5H2O
11.11.8WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2O
11.11.9UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2O
11.11.11VogliteCa2Cu(UO2)(CO3)4 · 6H2O
11.11.12AndersoniteNa2Ca(UO2)(CO3)3 · 6H2O
11.11.13SwartziteMgCa(UO2)(CO3)3 · 12H2O
11.11.14RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2O
11.11.15Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2O
11.11.16Shabaite-(Nd)Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2 · 6H2O
11.11.17Astrocyanite-(Ce)Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2O
11.11.18Bijvoetite-(Y)Y8(UO2)16(CO3)16O8(OH)8 · 39H2O
11.11.19WidenmannitePb2(OH)2[(UO2)(CO3)2]
11.11.20ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2O

Other Names for Sharpite

Name in Other Languages:
German:Sharpit
Spanish:Sharpita

Other Information

Other Information:
Soluble in dilute acids with effervescence.
Health Risks:
Radioactive

References for Sharpite

Reference List:
Mélon M J (1938) La sharpite, nouveau carbonate d'uranyle du Congo belge. Bulletin des Séances de l'Institut Royal Colonial Belge 9, 333-336

Foshag W F (1939) New mineral names. American Mineralogist (1939): 24: 658.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 275.

Dunn P J, Chao G Y, Fleischer M, Ferraiolo J A, Langley R H, Pabst A, Zilczer J A (1985) New mineral names. American Mineralogist (1985): 70: 220.

Internet Links for Sharpite

mindat.org URL:
http://www.mindat.org/min-3633.html
Please feel free to link to this page.

Localities for Sharpite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Democratic Republic of Congo (Zaïre) (TL)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Shinkolobwe
Bull.Inst.roy.col.belge,(1938) 9, 333-336; Lapis 17(3), 13-40 (1992)
France
 
  • Alsace
    • Haut-Rhin
      • Thur valley (Thann valley)
        • Kruth
Handbook of Mineralogy; Jiltl Cejka - Zdenek Urbanec (1974) Alteration of Minerals in Museum Collections I.SBORNII( NARODNIHO MUZEA V PRAZE ACTA MUSEI NATIONALIS PRAGAE Volumen XXX B (1974), No. 1-2
  • Limousin
    • Haute-Vienne
      • Bessines-sur-Gartempe
Le Règne Minéral, Hors Série IV, 1998
Germany
 
  • Rhineland-Palatinate
    • Hunsrück
      • Birkenfeld
        • Ellweiler
Aufschluss 69/(7+8), Lapis 79/(7+8)
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Kłodzko District
Eligiusz Szełęg collection (SEM/EDS identification)
Mineral and/or Locality  
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