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Retgersite

Year of discovery: 1949 (Ragra mine, Peru), 1963 (Japan)

Locality list: 2 localities of retgersite

• NiSO₄,6H₂O
• [Ni²⁺][SO₄]^2-,6H₂O

• Class: Sulfate - Hydrate
• Soluble in: Water
• Taste: Bitter
• Formed on dehydration of Morenosite.
• Formed from water solution of 31.5-53.5 degree.

• Polymorph: Nickelhexahydrite (Monoclinic)

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

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

• Color: Green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Opaque

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 2.5
• Density: 2.0

• System: Tetragonal
• Group: 422, P4₁2₁2
• Lattice: a=6.8, c=18.3