Mineralogy Database

Koragoite Mineral Data

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General Koragoite Information

Help on Chemical Formula: Chemical Formula: (Mn++,Fe+++)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20
Help on Composition: Composition: Molecular Weight = 1,241.59 gm
   Tantalum   16.03 %  Ta   19.57 % Ta2O5
   Titanium    1.16 %  Ti    1.93 % TiO2
   Manganese  13.50 %  Mn   12.86 % MnO /  5.09 % Mn2O3
   Niobium    17.96 %  Nb   25.69 % Nb2O5
   Iron        3.37 %  Fe    4.82 % Fe2O3
   Tungsten   22.21 %  W    28.01 % WO3
   Oxygen     25.77 %  O
             ______        ______ 
             100.00 %       97.97 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+2.25Fe3+0.75Nb1.2Ta0.6Ti0.3Nb1.2Mn3+0.8W1.5Ta0.5O20
Help on Environment: Environment: In granitic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: Vez-Dara River valley, Shakhdara Range, in the southwestern Pamir Mountains, Tajikistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Aleksei Aleksandrovich Korago (1942�1993), geologist who investigated the formation of river pearls in the Arkhangel'sk district of Russia, and the origin of amber.
Help on Name Pronunciation: Name Pronunciation: Koragoite + Pronunciation Say KORAGOITE
Help on Synonym: Synonym: IMA1994-049