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Clinoptilolite-Ca

Year of discovery: 1977 (Kuruma pass, Japan), 1969 (Japan)

Locality list: 5 localities of clinoptilolite-Ca

• Ca₃Al₆Si₃₀O₇₂,20H₂O
• (Ca,K₂,Na₂)₃Al₆(Al,Si)₄Si₂₆O₇₂,20H₂O
• [Ca²⁺₃][(AlSi₅O₁₂)₆]^3-,20H₂O

• Class: Clinoptilolite series < Heulandite group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water
• Radioactive: Very weak

• Ca => K₂: Clinoptilolite-K (Series)
• Ca => Na₂: Clinoptilolite-Na (Series)

• Si₃ => NaCaAl₃: Heulandite-Ca (Series)

• Color: Colorless, White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Earthy

• Cleavage: Perfect on {010} (1 plane)
• Hardness: 3.5-4
• Density: 2.2

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=17.7, b=18.0, c=7.4, β=116.5