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Picropharmacolite

Year of discovery: 1819 (Richelsdorf Smelter, Germany), 2009 (Japan)

Locality list: A locality of picropharmacolite

• Ca₄Mg(AsO₄)₂(HAsO₄)₂,11H₂O
• [Ca²⁺₄][Mg²⁺][(HAsO₄)₂|(AsO₄)₂]^10-,11H₂O

• Class: Arsenate - Hydrate
• Fluorescence: UV excitation (Pale blue-Pale purple)

• Color: White
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {100} and {010} (2 planes)
• Hardness: 1-2
• Density: 2.6

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=13.5, b=13.5, c=6.7, α=99.9, β=96.4, γ=91.6