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Anatase (Photo) [abbr. Ant ]

Year of discovery: 1801 (St Christophe-en-Oisans, France), 1897 (Japan)

Locality list: 95 localities of anatase

• TiO₂
• [Ti⁴⁺][O₂]^4-

• Class: Oxide
• Insoluble in: HCl
• Substitution pseudomorph: Replace Titanite. (Xanthotitane)
• Substitution pseudomorph: Replace Ilmenite, Titanite, or Perovskite. (Leucoxene)

• Polymorph: Brookite (Orthorhmbic), Rutile (Tetragonal), Akaogiite (Monoclinic)

• Ti => Ge: Argutite
• Ti => Sn: Cassiterite
• Ti => Pb: Scrutinyite (α), Plattnerite
• Ti => Mn: Pyrolusite (β), Ramsdellite (γ), Akhtenskite (ε)
• Ti => Si: Quartz (α), β-Quartz (β), Tridymite, Cristobalite, Coesite, Stishovite, Mogánite (Moganite)
• Ti => V: Paramontroseite
• Ti => Mo: Tugarinovite
• Ti => U: Uraninite
• Ti => Th: Thorianite
• Ti => Ce: Cerianite-(Ce)
• Ti => Se: Downeyite
• Ti => Zr: Baddeleyite
• Ti => Te: Tellurite, Paratellurite

• Color: Brown, Bluish black
• Streak: Pale yellow
• Luster: Sub-Metallic
• Diaphaneity: Transparent-Translucent

• Habit: Bipyramidal
• Twin: Repeated to the direction of elongation.

• Cleavage: Perfect on {001} and {011}
• Hardness: 5.5-6
• Density: 3.9

• System: Tetragonal
• Group: 4/m2/m2/m, I4₁/amd
• Lattice: a=3.8, c=9.5

Etymology: Anatais (elongate) in Greek