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Rhomboclase

Year of discovery: 1891 (Smolník (Schmöllnitz), Slovakia), 2002 (Japan)

Locality list: A locality of rhomboclase

• HFe(SO₄)₂,4H₂O
• [Fe³⁺H⁺(H₂O)₂][(SO₄)₂]^4-,2H₂O

• Class: Sulfate - Hydrate
• Soluble in: Water (Slowly)
• Physical: Elastic
• Formed by alteration of Pyrite.

• Color: Blue, Colorless, White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {001} (1 plane), Good on {110} (2 planes)
• Hardness: 2
• Density: 2.2

• System: Orthorhombic
• Group: mmm, Pnma
• Lattice: a=9.7, b=18.3, c=5.4