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(mineralogy) A blue or brown mineral, a form of titanium dioxide, used as a pigment.

Anatase – Oxide minerals – TiO₂ – Ant – 4.DD.05 – Tetragonal – Ditetragonal dipyramidal (4/mmm) – I4₁/amd – A = 3.7845, c = 9.5143 [Å]; Z = 4 – 79.88 g/mol – Black, reddish to yellowish brown, dark blue, gray – Pyramidal (crystals are shaped like pyramids), tabular (form dimensions are thin in one direction). Rare on {112} – Perfect on [001] and [011] – Subconchoidal – Brittle – 5.5–6 – Adamantine to splendent, metallic – Pale yellowish white – Transparent to nearly opaque – 3.79–3.97 – Uniaxial (−), anomalously biaxial in deeply colored crystals – Nω = 2.561, nε = 2.488 – Δ = 0.073 – Weak.

(mineralogy) A blue or brown mineral, a form of titanium dioxide, used as a pigment.

Extended portion of the anatase lattice.

(mineralogy) A blue or brown mineral, a form of titanium dioxide, used as a pigment.

Black anatase crystals on smoked quartz