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Sussexite (Photo)

Year of discovery: 1868 (Franklin mine, USA, Hamburg mine, USA, and Trotter mine (Lehigh mine), USA), 1976 (Japan)

Locality list: 33 localities of sussexite

• MnBO₂(OH)
• (Mn,Mg)BO₂(OH)
• [Mn²⁺₂][OH|HB₂O₅]^4-

• Class: Soro-Borate - Hydroxide
• Soluble in: HCl (Slowly), HNO₃ (Slowly), H₂SO₄ (Slowly)

• Mn => Ca: Sibirskite, Parasibirskite
• Mn => Mg: Szaibélyite (Szaibelyite) (Series)

• Color: White, Pale pink
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent-Translucent

• Habit: Acicular

• Cleavage: Perfect (2 planes)
• Hardness: 3
• Density: 3.3

• System: Orthogonal
• Lattice: a=10.7, b=12.8, c=3.3