Orthobrannerite

General Information: Chemical Formula:U++++U++++++Ti4O12(OH)2 Composition:(Molecular Weight = 893.59 gm)Uranium 53.28 % U Titanium 21.43 % TiHydrogen 0.23 % H Oxygen 25.07 % O  Empirical Formula: UUTi4O12(OH)2 IMA Status:Approved IMA 1978Physical Properties: Cleavage:None Color:brownish green or black. Density:5.46 Hardness:5.5 - Knife Blade Luster:Adamantine Streak:brownish yellowMore details...

General Information: Chemical Formula:(U,Ca,Ce)(Ti,Fe)2O6 Composition:(Molecular Weight = 354.80 gm)Calcium 3.39 % CaCerium 7.90 % CeUranium 33.54 % U Titanium 20.24 % TiIron 7.87 % FeOxygen 27.06 % O  Empirical Formula: U0.5Ca0.3Ce0.2Ti1.5Fe2+0.5O6 Environment:Found in gold palcers. IMA Status:Approved IMA 1963 Locality:Kelly Gulch, Custer County, Idaho. Stanley Basin, Wyoming. USA. Name Origin:Named after the American geologist, G. Branner (1850-1922).Physical Properties: Cleavage:None Color:brown, brown green, yellow, yellow brown, or black. Density:4.5 - 6.35, Average = 5.42 Diaphaniety:Subtranslucent to opaque Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Crystalline - Fine - Occurs as well-formed fine sized crystals., Metamict - Mineral originally crystalline, now amo rphous due to radiation damage. Hardness:4-5 - Fluorite-Apatite Luminescence:Highly Radioactive. Luster:Adamantine - Resinous Streak:dark greenish brownMore details...

2Ti4O12(OH)2