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Phengite series [abbr. Ph ]

Year of discovery: 1960 (Japan)

Locality list: 65 localities of phengite

• [K][ A ][ B ][(OH)₂| X Si₃O₁₀]

• [ Al ][ Al ][ Al ]: Muscovite
• [ Mg ][ Fe³⁺ ][ Si ]: Celadonite

• Class: Dioctahedral < True mica group < Mica supergroup
• Variety: Mariposite (+Cr, Green)

• System: Trigonal (3T, High pressure), Monoclinic (2M₁, Low pressure) (Layer-stacking polytype)