Mineraller ve özellikleri Anatase General Anatase Information Chemical Formula: TiO2 Composition: Molecular Weight = 79.88 gm Titanium 59.94 % Ti 100.00 % TiO 2 Oxygen 40.06 % O ______ ______ 100.00 % 100.00 % = TOTAL OXIDE Empirical Formula: TiO 2 Environment: Usually secondary, derived from other Ti-bearing minerals. Common as a detrital mineral. Name Origin: From the Greek, anatasis - "elongation." Synonym: ICSD 9852 Octahedrite PDF 21-1272 Anatase Crystallography Axial Ratios: a:c = 1:2.50725 Cell Dimensions: a = 3.793, c = 9.51, Z = 4; V = 136.82 Den(Calc)= 3.88 Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd X Ray Diffraction: By Intensity(I/I o): 3.51(1), 1.891(0.33), 2.379(0.22), Forms [ 1 1 1] Physical Properties of Anatase Cleavage: [101] Perfect, [001] Distinct Color: Black, Reddish brown, Yellowish brown, Dark blue, Gray. Density: 3.9 Diaphaniety: Transparent to translucent Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). Habits: Pyramidal - Crystals are shaped like pyramids., Tabular - Form dimensions are thin in one direction. Hardness: 5.5-6 - Knife Blade-Orthoclase Luminescence: None. Luster: Adamantine - Resinous Streak: pale yellowish white Optical Properties of Anatase Optical Data: Uniaxial (-), e=2.488, w=2.561, bire=0.0730.