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Szomolnokite

Year of discovery: 1877 (Smolník, Slovakia), 1958 (Japan)

Locality list: 4 localities of szomolnokite

• FeSO₄,H₂O
• [Fe²⁺][SO₄]^2-,H₂O

• Class: Sulfate - Hydrate
• Soluble in: Water (Very slowly)

• Fe => Co: Cobaltkieserite
• Fe => Ni: Dwornikite
• Fe => Zn: Gunningite
• Fe => Mg: Kieserite
• Fe => Cu: Poitevinite
• Fe => Mn: Szmikite

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

• Color: Pale yellow, Colorless
• Streak: White
• Luster: Resinous
• Diaphaneity: Translucent

• Cleavage: Indistinct
• Hardness: 2.5
• Density: 3.1

• System: Monoclinic
• Group: 2/m, A2/a
• Lattice: a=7.6, b=7.5, c=7.1, β=115.9