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Betpakdalite-CaCa

Year of discovery: 1961 (Kara-Oba deposit, Kazakhstan), 1989 (Japan)

Locality list: A locality of betpakdalite-CaCa

• Ca₃Fe³⁺₃Mo₈(AsO₄)₂O₂₈(OH),23H₂O
• [Ca₂(H₂O)₁₇]⁴⁺[Ca(H₂O₆)]²⁺[(AsO₄)₂|Mo⁶⁺₈Fe³⁺₃O₂₈(OH)]^6-

• Class: Arsenate - Molybdate - Hydroxide - Hydrate

• Ca => Mg: Betpakdalite-CaMg

• CaO => NaOH: Betpakdalite-NaCa

• Ca₃O₃ => Na₃(OH)₃: Betpakdalite-NaNa

• Color: Yellow
• Luster: Waxy
• Diaphaneity: Opaque

• Habit: Powder

• Cleavage: Distinct (3 planes)
• Hardness: 3

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=19.5, b=11.1, c=15.3, β=131.6