Kogarkoite
Encyclopedia
Kogarkoite [Na3F] is a mineral with a usually pale blue color. The specific gravity
is about 2.67 and the hardness is 3.5. The crystall system is monoclinic. Kogarkoite is named after the Russian scientist Lia Nikolaevna Kogarko who discovered this mineral.
Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. The reference substance is nearly always water for...
is about 2.67 and the hardness is 3.5. The crystall system is monoclinic. Kogarkoite is named after the Russian scientist Lia Nikolaevna Kogarko who discovered this mineral.