Cyclosilicate
A silicate mineral subclass in which SiO₄ tetrahedra link into closed rings, typically three-membered (Si₃O₉) or six-membered (Si₆O₁₈). Tourmaline, beryl, and cordierite are important cyclosilicates.
A silicate mineral subclass in which SiO₄ tetrahedra link into closed rings, typically three-membered (Si₃O₉) or six-membered (Si₆O₁₈). Tourmaline, beryl, and cordierite are important cyclosilicates.