Figure 1
(Left panel) Schematic structure of mica minerals: embedding of one interlayer I in between two TOT layers, each one of which, in turn, consists of one octahedral sheet M sandwiched by two tetrahedral sheets T. (Right panel) The local structure surrounding the K atoms, where 12 O atoms in the first shell are indexed with numbers and connected to the K atom, while the Si atoms locate in the centres of O tetrahedrons. |