Uhligite

General Information: Chemical Formula:Ca3(Ti,Al,Zr)9O20 Environment:Nepheline-syenite rocks. Locality:Lake Magad, Rift Valley, Tanganyika Territory, Kenya, East Africa. Name Origin:Named for Alfred Louis Johannes Uhlig (1883-1919), German geologist, leader of the African expedition in which the material was first collected.Physical Properties: Cleavage:[001] Imperfect Color:black. Density:4.15 Diaphaniety:Subtranslucent to opaque Hardness:5.5 - Knife Blade Luster:MetallicMore details...