[ Top ] [ Japanese ]

Medaite

Year of discovery: 1981 (Molinello mine, Italy), 2013 (Japan)

Locality list: A locality of medaite

• Mn₆VSi₅O₁₈(OH)
• (Mn,Ca)₆(V,As)Si₅O₁₈(OH)
• [Mn²⁺₆][V⁵⁺][OH|Si₅O₁₈]^17-

• Class: Sorosilicate - Hydroxide

• V => As: Arsenmedaite

• V⁵⁺ => AlSi(OH)₂: Bunnoite

• Color: Reddish brown
• Streak: Pale yellow
• Luster: Sub-Adamantine
• Diaphaneity: Translucent

• Cleavage: Perfect on {100} (1 plane), Parting on {011} (1 plane)
• Density: 3.7

• System: Monoclinic
• Group: 2/m, P2₁/n
• Lattice: a=6.7, b=28.9, c=7.6, β=95.4