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Sample n° 2768

Minerals found in the sample

Mineral	Formula	Category	Subcategory	Importance
SHARPITE	Ca2(UO2)6(CO3)5(OH)4•6H2O	carbonates	-	major
WOLSENDORFITE	Pb7(UO2)14O19(OH)4•12H2O	oxides and hydroxides	-	major
URANOPHANE	Ca(UO2)2(SiO3OH)2•5H2O	nesosilicates	-	minor

Description

Description: sample with radiating greyish green sharpite crystals, red flattened hexagonal wolsendorfite crystals, crust of greenish yellow uranophane needles

Information: Deliens, M., 1977. Review of the hydrated oxides of U and Pb, with new X-ray powder data. Mineralogical Magazine 41, 51-57. (wolsendorfite) // Cejka, J. & Urbanec, Z., 1975. Secondary uranium minerals in the collections of the National Museum in Prague. III. Sharpite. Casopis Narodniho Muzea, Rada Prirodovedecka, 144, 11-19. (in Czech) // Urbanec, Z. & Cejka, J., 1979. Infrared spectra of rutherfordine and sharpite. Collection of Czechoslovak Chemical Communications 44, 1-9. // Cejka, J., Mrazek, Z. & Urbanec, Z., 1984. New data on sharpite, a calcium uranyl carbonate. Neues Jahrbuch für Mineralogie Monatshefte 1984, 109-117. // Plásil, J., 2020. Crystal structure of uranyl-oxide mineral wölsendorfite revisited. Bulletin Mineralogie Petrologie 28, 322-330.

Origin

• Country: Congo (RDC)
• Region: Katanga
• Locality: Shinkolobwe

Specification

• Donors: Nève de Mévergnies
  Donation year: 1950
• Sampling year:
  Registration date:
• Quantity: 1
  Size: 8 x 5 cm

• Dimension code 1>2>3: 2
  Quality code 1>2>3: 1
• Holotype: no
  Paratype: no
  Radioactive: yes
• Thin section: yes
  Chemical analysis: no
  X-Ray spectra: yes

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