[ Top ] [ Japanese ]

Rossmanite [abbr. Rsm ]

Year of discovery: 1998 (Rožná pegmatite, Czech), 2011 (Japan)

Locality list: A locality of rossmanite

• LiAl₈(BO₃)₃Si₆O₁₈(OH)₄
• [][Li⁺][Al³⁺₂][Al³⁺₆][(OH)₃|OH|(BO₃)₃|(SiO₃)₆]^25-

• Class: Vacant-subgroup 2 < X-vacant-tourmaline group < Tourmaline supergroup
• Class: Cyclosilicate (Single ring) - Borate - Hydroxide

• [](OH) => O: Oxy-rossmanite
• [](OH) => NaO: Darrellhenryite

• []Al_0.5 => NaLi_0.5: Elbaite

• []Al => CaLi: Liddicoatite

• LiAl => Fe₂: Foitite
• LiAl => Mg₂: Magnesiofoitite

• LiAl₂ => NaFe₃: Schorl
• LiAl₂ => NaMg₃: Dravite
• LiAl₂ => NaMn₃: Tsilaisite

• Color: Colorless, Pale pink
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: No
• Hardness: 7
• Density: 3.0

• System: Trigonal
• Group: 3m, R3m
• Lattice: a=15.8, c=7.1