[ Top ] [ Japanese ]

Titanite (Photo) [abbr. Ttn, Spn ]

Year of discovery: 1795 (Hauzenberg, Germany, Philipstown Township, USA, and Rossie, USA), 1891 (Japan)

Locality list: 813 localities of titanite

• CaTiSiO₅
• [Ca²⁺][Ti⁴⁺][O|SiO₄]^6-

• Class: Titanite group
• Class: Nesosilicate - Oxide
• Variety: Yttrotitanite, Keilhauite (+Y)
• Soluble in: HCl
• Fluorescence: UV excitation (Pale brown)
• Radioactive: Moderate
• Substitution pseudomorph: Replaced by Anatase. (Xanthotitane)
• Substitution pseudomorph: Replaced by Anatase or Rutile. (Leucoxene)

• Ti => Sn: Malayaite (Series)
• Ti => V: Vanadomalayaite

• Color: Colorless, Brown, Green Pink
• Streak: White
• Luster: Adamantine
• Diaphaneity: Transparent-Translucent

• Habit: Thin platy (Wedge shape)

• Cleavage: Perfect on {110} (2 planes), Imperfect on {100} and {112} (3 planes)
• Hardness: 5-5.5
• Density: 3.5

• System: Monoclinic
• Group: 2/m, P2₁/a
• Lattice: a=7.1, b=8.7, c=6.6, β=113.8

Etymology: Sphenos (Wedge) in Greek

Synonym: Sphene