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Atelestite

Year of discovery: 1832 (Neuhilfe mine, Germany)

Locality list:

• Bi₂(AsO₄)O(OH)
• [Bi³⁺₂][OH|O|AsO₄]^6-

• Class: Arsenate - Oxide - Hydroxide
• Soluble in: HCl, HNO₃ (Difficult)

• AsO₄ => PO₄: Smrkovecite
• AsO₄ => VO₄: Hechtsbergite

• Color: Yellow, Yellow green, Yellow brown
• Luster: Adamantine, Resinous
• Diaphaneity: Transparent, Translucent

• Cleavage: Indistinct on {001} (1 plane)
• Hardness: 4.5-5
• Density: 7.1

• System: Monoclinic
• Group: 2/m, P2₁/b
• Lattice: a=10.9, b=7.4, c=7.0, β=107.2