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Indialite

Year of discovery: 1954 (Bokaro coalfield, India), 1982 (Japan)

Locality list: No locality of indialite

• Mg₂Al₄Si₅O₁₈
• [Mg²⁺₂][Al₄Si₅O₁₈]^4-

• Class: Cyclo-Aluminosilicate (Single ring)
• Substitution pseudomorph: Replaced by Muscovite or Paragonite. (Cerasite)

• Polymorph: Cordierite (Low temperature, Orthorhombic)

• Mg => Fe: Ferroindialite, Sekaninaite

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

• Cleavage: No
• Hardness: 7-7.5
• Density: 2.5

• System: Hexagonal
• Group: 6/mmm, P6/mcc
• Lattice: a=9.8, c=9.3