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Wakabayashilite (Photo)

Year of discovery: 1970 (Japan as the first occurence in the World)

Locality list: A locality of wakabayashilite

• As₅S₇
• (As,Sb)₅S₇
• [As₆S₉][As₄S₅]

• Class: Sulfide

• Color: Yellow, Orange
• Streak: Orange
• Luster: Silky
• Diaphaneity: Translucent

• Habit: Plumosity or Prismatic elongated to [010]

• Cleavage: Perfect on {100}, {010}, and {101} (4 planes)
• Hardness: 1.5
• Density: 4.0

• System: Orthorhombic
• Group: mm2, Pna2₁
• Lattice: a=25.3, b=14.6, c=6.5

Etymology: Yaichiro Wakabayashi (1874-1943), Economic geologist of Mitsubishi Mining Company