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Népouite, Nepouite

Year of discovery: 1906 (Népoui mine, New Caledonia), 1989 (Japan)

Locality list: 2 localities of népouite

• Ni₃Si₂O₅(OH)₄
• (Ni,Mg)₃Si₂O₅(OH)₄
• [Ni²⁺₃][(OH)₄|Si₂O₅]^6-

• Class: Lizardite subgroup < Serpentine-Kaolin group
• Class: Phyllosilicate - Hydroxide

• Ni => Mg: Antigorite, Chrysotile, Lizardite (Series)
• Ni => Mn: Caryopilite
• Ni => Fe: Greenalite

• Color: Pale green, Green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Good on {001} and {010} (2 planes)
• Hardness: 2-2.5
• Density: 2.9

• System: Orthorhombic
• Group: mm2, Ccm2₁
• Lattice: a=5.3, b=9.2, c=7.3