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Sample n° 4444

Minerals found in the sample
Mineral Formula Category Subcategory Importance
COLUMBITE (Fe,Mg,Mn)Nb2O6 oxides and hydroxides - major
TANTALITE (Fe2+,Mn2+)Ta2O6 oxides and hydroxides - major
Description: black debris
Information: Gouder de Beauregard, C., Dubois, J. & Bourguignon, P., 1967. Comportement thermique des columbotantalites. Annales de la Société Géologique de Belgique 90, 501-518.
Country: Rwanda       Region: Gitarama       Locality: Shaki
Donors Polinard Sampling year
Donation year 1954 Registration date
Quantity 2 Dimension code 1>2>3 3
Size 3 Quality code 1>2>3 1
Holotype no Thin section no
Paratype no Chemical analysis no
Radioactive no X-Ray spectra no