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Yoshimuraite (Photo)

Year of discovery: 1959 (Japan as the first occurence in the World)

Locality list: 4 localities of yoshimuraite

• Ba₂Mn₂TiSi₂O₇(PO₄)O(OH)
• (Ba,Sr)₂(Mn,Fe)₂(Ti,Fe)Si₂O₇(PO₄,SO₄)O(OH)
• [Ba²⁺₂][Mn²⁺₂][Ti⁴⁺][OH|O|PO₄|Si₂O₇]^12-

• Class: Sorosilicate - Phosphate - Oxide - Hydroxide

• Color: Orange, Reddish brown, Dark brown
• Streak: Pale brown
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Platy

• Cleavage: Perfect on {010} (1 plane), Distinct on {101} 1 plane
• Hardness: 4.5
• Density: 4.2

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=7.0, b=14.7, c=5.4, α=93.5, β=90.2, γ=95.3

Etymology: Toyofumi Yoshimura (1905-1990), economic geologist of the University of Kyushu