Add time:08/04/2019         Source:sciencedirect.com

Four new transition metal fluorosulfates NH4MSO4F (M = Mn, 1; Fe, 2; Co, 3; Ni, 4) were solvothermally synthesized in the solvent of N,N-dimethylacetamide (DMA) with HF as the mineralization agent. The X-ray single crystal diffraction analyses revealed that 1–4 are isomorphous, and possess a three-dimensional framework with the same structural topology as the known nonlinear optical material KTiOPO4 (KTP). The four compounds were constructed from MO4F2 octahedra and SO4 tetrahedra to form two kinds of intersecting 6-membered ring channels along the a and c axes, respectively. Within the channels locate the NH4+ cations from the decomposition of DMA molecules. All the compounds are thermally stable up to 330 °C. The magnetic studies of 1–4 revealed the antiferromagnetic interaction behaviors in the range of 1.8–300 K.

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