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Namansilite

Year of discovery: 1989 (Ir-Nimi deposit, Russia), 1994 (Japan)

Locality list: A locality of namansilite

• NaMnSi₂O₆
• [Na⁺][Mn³⁺][(SiO₃)₂]^4-

• Class: Na pyroxene group < Pyroxene supergroup
• Class: Inosilicate (Single chain)

• Na => Ca: Johannsenite
• Na => Mg: Kanoite, Donpeacorite

• Mn => Fe: Aegirine
• Mn => Al: Jadeite
• Mn => Cr: Kosmochlor
• Mn => V: Natalyite
• Mn => Sc: Jervisite

• Color: Brownish red, Purplish red
• Streak: Brownish red
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect (2 planes, 90 degree)
• Hardness: 6-7
• Density: 3.6

• System: Monoclinic
• Group: 2/m, C2/c
• Lattice: a=9.5, b=8.6, c=5.4, β=105.1

Etymology: Chemical composition