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Wairakite (Photo) [abbr. Wrk ]

Year of discovery: 1955 (Lake Taupo, New Zealand), 1966 (Japan)

Locality list: 73 localities of wairakite

• CaAl₂Si₄O₁₂,2H₂O
• [Ca²⁺][(AlSi₂O₆)₂]^2-,2H₂O

• Class: Analcime group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water

• Ca => Cs₂: Pollucite
• Ca => Na₂: Analcime (Series)

• 2H₂O => 4H₂O: Laumontite

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

• Habit: Tetracosahedron

• Cleavage: Distinct on {100} (1 plane)
• Hardness: 5.5-6
• Density: 2.3

• System: Monoclinic
• Group: 2/m, I2/a
• Lattice: a=13.7, b=13.6, c=13.6, β=90.5