2005/07/06 | 环硅酸盐[Cyclosilicate]
类别(℃〖化学〗) | 评论(0) | 阅读(32) | 发表于 20:25
A group of silicate minerals consisting of rings of linked SiO4 tetrahedra having an Si:O ratio of 1:3.

Structure Mineral Formula
Si3O9 benitoite BaTiSi3O9
Si4O12 axinite (Ca,Fe+2,Mn)3Al2(BO3)(Si4O12)(OH)
Si6O18 beryl Be3Al2Si6O18
  cordierite (Mg,Fe)2Al4Si5O H2O
  tourmaline (Na,Ca)(Li,Mg,Al)(Al,Fe,Mn)6(BO3)3(Si6O18)(OH)4

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