Synthesis of ZnFe2O4 Nanoparticles Confined Within Nanoporous Silica Using Trinuclear Oxo-centered Complex: Inorganic Complexes as a Precursor for the Preparation of Magnetic Nanoporous Silica

Formation of ZnO4 Tetrahedra and ZnO6 Octahedra in TeZnO3 Synthesized under High Pressure

“…Instead, a TeZnO 3 single crystal is grown at ambient pressure. , As shown in Figure a, different from the BO 6 octahedral coordination in perovskite, the ambient-pressure synthesized TeZnO 3 (AP-TZO) possesses unusual ZnO 5 polyhedral units with the Zn–O bond lengths changing from 1.96 to 2.27 Å (see Table ). In general, ZnX 4 (X stands for a coordinated atom) tetrahedra are often found to occur in most Zn-based compounds such as sphalerite ZnS, wurtzite ZnO, spinel (Al/Fe) 2 ZnO 4 , etc. − In addition, in A 2 BB′O 6 -type double perovskites, the Zn 2+ can also be introduced into the B site to form ZnO 6 octahedra as observed in La 2 ZnIrO 6 , Ba 2 ZnIrO 6 , and Sr 2 ZnIrO 6 . − Until now, in the zinc compounds, ZnX 4 tetrahedra and ZnX 6 octahedra have not been found to coexist.…”