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Theophrastite

Year of discovery: 1980 (Mount Vermion, Greece), 2017 (Japan)

Locality list: A locality of theophrastite

• Ni(OH)₂
• [Ni²⁺][(OH)₂]^2-

• Class: Brucite group
• Class: Hydroxide

• Ni => Mn: Pyrochroite
• Ni => Fe: Amakinite
• Ni => Ca: Portlandite
• Ni => Mg: Brucite

• Color: Green
• Streak: Pale green
• Luster: Silky
• Diaphaneity: Translucent

• Cleavage: Perfect on {0001} (1 plane)
• Hardness: 3.5
• Density: 4.0

• System: Trigonal
• Group: (-3)m, P(-3)m1
• Lattice: a=3.1, c=4.6