“All-Four-in-One”: A Novel Mercury Tellurite-Nitrate Hg3(TeO3)(Te3O7)(NO3)2 Exhibiting Exceptional Optical Anisotropy

The novel mercury-based tellurite–nitrate Hg 3 (TeO 3 )(Te 3 O 7 )(NO 3 ) 2 possesses a unique [(Hg 3 Te 4 O 10 ) 2+ ] ∞ layered structure and exhibits the highest birefringence in tellurite–nitrates.