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A new organic–inorganic hybrid compound (C 3 N 6 H 7 ) 2 SiF 6 ·H 2 O, in which C 3 N 6 H 7 + groups are uniformly arranged under the regulation of SiF 6 octahedra, shows highly polarization anisotropy and a breakthrough in the energy gap.
Shen et al. (Sat,) studied this question.