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Ardealite

Year of discovery: 1931 (Cioclovina cave, Romania), 1974 (Japan)

Locality list: 2 localities of ardealite

• Ca₂(SO₄)(HPO₄),4H₂O
• [Ca²⁺₂][HPO₄|SO₄]^4-,4H₂O

• Class: Sulfate - Phosphate - Hydrate

• Color: Pale yellow
• Streak: Pale yellow
• Luster: Earthy
• Diaphaneity: Translucent

• Cleavage: No
• Hardness: 1-1.5
• Density: 2.3

• System: Monoclinic
• Group: m, Cc
• Lattice: a=5.7, b=31.0, c=6.3, β=117.3