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Hennomartinite

Year of discovery: 1993 (Wessels mine, South Africa), 2003 (Japan)

Locality list: A locality of hennomartinite

• SrMn₂Si₂O₇(OH)₂,H₂O
• [Sr²⁺][Mn³⁺₂][(OH)₂|Si₂O₇]^8-,H₂O

• Class: Lawsonite group
• Class: Sorosilicate - Hydroxide - Hydrate

• Sr => Ba: Noelbensonite

• Mn => Al: Itoigawaite

• Color: Yellowish brown
• Streak: Yellowish brown
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: No
• Hardness: 4

• System: Orthorhombic
• Group: mmm, Cmcm
• Lattice: a=6.3, b=9.0, c=13.4