In terms of the modular approach (Ferraris et al. 2014), the basis of the crystal structures of VSMs can be described as a combination of relatively rigid modules (rods) of the grossular structure [Ca10(Al6Mg2)8(SiO4)10]2+ and [Ca9Fe3+(Si2O7)4(OH)O]6− modules containing Si2O7 diorthogroups (below, “vesuvianite” modules), which are connected with each other via common vertices of the Y2 [Al(OH)2]44+ octahedra (Fig. 4.1).

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New Data on the Crystal Chemistry of VSMs and Their Application in Geology

  • Taras L. Panikorovskii,
  • Nikita V. Chukanov

摘要

In terms of the modular approach (Ferraris et al. 2014), the basis of the crystal structures of VSMs can be described as a combination of relatively rigid modules (rods) of the grossular structure [Ca10(Al6Mg2)8(SiO4)10]2+ and [Ca9Fe3+(Si2O7)4(OH)O]6− modules containing Si2O7 diorthogroups (below, “vesuvianite” modules), which are connected with each other via common vertices of the Y2 [Al(OH)2]44+ octahedra (Fig. 4.1).