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Nickelhexahydrite

Year of discovery: 1965 (Severniy mine, Russia), 1989 (Japan)

Locality list: A locality of nickelhexahydrite

• NiSO₄,6H₂O
• (Ni,Mg,Fe)SO₄,6H₂O
• [Ni(H₂O)₆]²⁺[SO₄]^2-

• Class: Hexahydrite group
• Class: Sulfate - Hydrate

• Polymorph: Retgersite (Tetragonal)

• Ni => Fe: Ferrohexahydrite
• Ni => Mg: Hexahydrite
• Ni => Zn: Bianchite
• Ni => Co: Moorhouseite
• Ni => Mn: Chvaleticeite

• 6H₂O => H₂O: Dwornikite
• 6H₂O => 7H₂O: Morenosite

• Color: Bluish green
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {010} (1 plane), Good on {100} (1 plane)
• Hardness: 2
• Density: 2.1

• System: Monoclinic
• Group: 2/m, C2/c
• Lattice: a=10.0, b=7.2, c=24.2, β=98.6