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Haiweeite

Year of discovery: 1959 (New Coso district, USA), 1961 (Japan)

Locality list: 2 localities of haiweeite

• Ca(UO₂)₂Si₅O₁₂(OH)₂,4.5H₂O
• [Ca²⁺][(UO₂)²⁺₂][H₂Si₅O₁₄]^6-,4.5H₂O

• Class: Weeksite group
• Class: Uranyl - Nesosilicate - Hydroxide
• Fluorescence: UV excitation (Pale green)
• Radioactive: Very strong

• Color: Pale yellow, Greenish yellow
• Streak: White
• Luster: Pearly

• Cleavage: Perfect on {001} (1 plane)
• Hardness: 3.5
• Density: 3.1

• System: Monoclinic
• Lattice: a=15.4, b=7.1, c=7.1, β=107.5

Synonym: Ranquilite