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Chibaite

Year of discovery: 2011 (Japan as the first occurence in the World)

Locality list: 2 localities of chibaite

• SiO₂,n(CH₄,C₂H₆,C₃H₈,C₄H₁₀) or Na_X(Si_139-X,Al_X)O₂₇₂,(CH₄,C₂H₆,C₃H₈,C₄H₁₀)_24-X
• Na(Si,Al)₁₃₆O₂₇₂,n(C,H)

• Class: Oxide - Clathrate (Type II hydrate)
• Substitution pseudomorph: Replaced by Quartz.

• C₂H₆ => N₂: Melanophlogite
• C₂H₆ => C_XH_2X+2: Bosoite
• C₂H₆ => H₂O: Opal

• Color: Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: No
• Hardness: 7
• Density: 2.0

• System: Cubic
• Group: m3, Fd3
• Lattice: a=19.4

Etymology: Chiba prefecture, Japan, where this mineral was discovered