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Teineite

Year of discovery: 1936 (Japan as the first occurence in the World)

Locality list: 3 localities of teineite

• CuTeO₃,2H₂O
• [Cu²⁺][TeO₃]^2-,2H₂O

• Class: Tellurite - Hydrate
• Soluble in: HCl (Solution turns Yellowish green), HNO₃ (Solution turns Blue), H₂SO₄ (Solution turns Blue)
• Alter to Malachite and Azurite.

• TeO₃ => SeO₃: Chalcomenite

• Color: Blue
• Streak: Pale blue
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Prismatic, Thin platy

• Cleavage: Good on {010} (1 plane), Poor on {001} and {100} (2 planes)
• Hardness: 2.5
• Density: 3.8

• System: Orthorhombic
• Group: mmm, P222
• Lattice: a=6.6, b=9.6, c=7.4

Etymology: Teine mine in Hokkaido, Japan, where this mineral was discovered for the first time.