[ Top ] [ Japanese ]

Welinite

Year of discovery: 1966 (Långban, Sweden), 1981 (Japan)

Locality list: 5 localities of welinite

• Mn₆W₂Si₂O₁₄
• Mn₆(W,Mg)₂(SiO₄)₂(O,OH)₆
• [Mn²⁺₆][W⁶⁺Mg²⁺][O₆|(SiO₄)₂]^20-

• Class: Nesosilicate - Oxide

• (W,Mg) => V: Franciscanite

• Color: Reddish brown, Dark red
• Streak: Pale reddish brown
• Luster: Resinous
• Diaphaneity: Transparent-Translucent

• Cleavage: Distinct
• Hardness: 4
• Density: 4.5

• System: Trigonal
• Group: 3, P3
• Lattice: a=8.2, c=4.8