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Lizardite [abbr. Lz ]

Year of discovery: 1955 (Kennack Cove, UK, and North shore of Lake Superior, USA), 1963 (Japan)

Locality list: 77 localities of lizardite

• Mg₃Si₂O₅(OH)₄
• [Mg²⁺₃][(OH)₄|Si₂O₅]^6-
• Platy structure

• Class: Lizardite subgroup < Serpentine-Kaolin group
• Class: Phyllosilicate - Hydroxide
• Soluble in: HCl (Gel residue)
• Formed by alteration of Forsterite.

• Polymorph: Antigorite (Monoclinic, above 75 degree), Chrysotile (Monoclinic)

• Mg => Mn: Caryopilite
• Mg => Ni: Népouite (Nepouite) (Series)
• Mg => Fe: Greenalite

• Color: Green, Yellow
• Streak: White
• Luster: Resinous
• Diaphaneity: Translucent

• Habit: Platy

• Cleavage: Perfect on {001}
• Hardness: 2.5
• Density: 2.6

• System: Hexagonal (2H₁), Triclinic (1T) (Layer-stacking polytype)
• Group: (-1), P(-1)
• Lattice: a=5.3, b=9.2, c=42.7, α=90.0, β=90.0, γ=90.0