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Roedderite [abbr. Rdr ]

Year of discovery: 1966 (Indarch meteorite, Azerbaijan), 1976 (Japan)

Locality list: A locality of roedderite

• Na₂Mg₅Si₁₂O₃₀
• (Na,K)₂(Mg,Fe)₅Si₁₂O₃₀
• [Na⁺₂][Mg²⁺₅][(Si₂O₅)₆]^12-

• Class: Milarite group
• Class: Cyclosilicate (Double ring)
• Radioactive: Very weak

• Mg => KNa: Eifelite (Series)

• Color: Colorless, Dark blue
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: No
• Hardness: 5-6
• Density: 2.6

• System: Hexagonal
• Group: 6/mmm, P6₁/mmc
• Lattice: a=10.1, c=14.3