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Gobbinsite

Year of discovery: 1982 (Hills Port, UK), 1993 (Japan)

Locality list: 2 localities of gobbinsite

• Na₄CaAl₆Si₁₀O₃₂,12H₂O
• Na₄(Ca,Mg,K₂)Al₆Si₁₀O₃₂,12H₂O
• [Na⁺₄][Ca²⁺][(Al₃Si₅O₁₆)₂]^6-,12H₂O

• Class: Gismondine group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water
• Radioactive: Very weak

• Color: Pale yellow, Pale brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: No
• Hardness: 4
• Density: 2.1

• System: Orthorhombic
• Group: mm2, Pmn2₁
• Lattice: a=9.8, b=10.2, c=10.1