Chemical composition:
Anatase is a titanium dioxide mineral, composed of titanium and oxygen with the chemical formula TiO2.
Physical properties:
Color: Anatase can be colorless, white, gray, yellow, or blue.
Luster: Anatase has a metallic or submetallic luster.
Transparency: Anatase can be transparent to opaque.
Crystal habit: Anatase typically forms as small, well-formed, hexagonal or tetragonal crystals.
Hardness: Anatase has a Mohs hardness of 5-6.
Specific gravity: Anatase has a specific gravity of 3.9-4.1.
Cleavage: Anatase has perfect cleavage in one direction.
Fracture: Anatase has a conchoidal fracture.
Magnetic properties: Anatase is not magnetic.
Thermal conductivity: Anatase has a low thermal conductivity.
Optical properties:
Refractive index: Anatase has a refractive index of 2.48-2.52.
Optic sign: Anatase is uniaxial positive
Dispersion: Anatase has a moderate dispersion.
Pleochroism: Anatase exhibits weak pleochroism.
Birefringence: Anatase has a high birefringence of about 0.035.
Extinction: Anatase has an extinction angle of about 20-30 degrees.
Interference colors: Anatase typically exhibits first-order gray or yellow interference colors.
Relief: Anatase has a moderate relief.
Optic axis: Anatase has a single optic axis.
Uses:
Anatase is not a commonly used mineral, but it is used as a source of titanium dioxide, which is used as a white pigment in paint, paper, and plastics.
Anatase is also used as a photocatalyst and in photoelectrochemical cells.
Anatase can also be used in the production of ceramics, and as a filler in paint and plastics.
In addition to this, it is used as a mineral specimen by collectors.
Please note that these properties can vary depending on the exact composition and impurities present in the mineral specimen.
Source - Internet