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Ferrohexahydrite

Year of discovery: 1962 (Sofiya mine, Ukraine), 1968 (Japan)

Locality list: 5 localities of ferrohexahydrite

• FeSO₄,6H₂O
• [Fe(H₂O)₆]²⁺[SO₄]^2-

• Class: Hexahydrite group
• Class: Sulfate - Hydrate

• Fe => Mg: Hexahydrite
• Fe => Ni: Nickelhexahydrite, Retgersite
• Fe => Zn: Bianchite
• Fe => Co: Moorhoseite
• Fe => Mn: Chvaleticeite

• 6H₂O => H₂O: Szomolnokite
• 6H₂O => 4H₂O: Rozenite
• 6H₂O => 5H₂O: Siderotil
• 6H₂O => 7H₂O: Melanterite

• Color: Yellowish brown, Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Hardness: 2
• Density: 1.9

• System: Monoclinic
• Group: 2/m, C2/c
• Lattice: a=10.1, b=7.3, c=24.6, β=98.4