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Synthesis, Crystal Structure, and Thermal Property of a Potassium-ammonium Double Salt K0.48(NH4)0.52MgCl3 · 6H2O

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Abstract

By evaporating the brine containing potassium and ammonium cations compound of the composition K0.48(NH4)0.52MgCl3 · 6H2O was obtained. Its crystal structure was determined by single crystal X-ray analysis. In the crystal, monovalent cation consists of 52% of ammonium and 48% of potassium. The crystal structure consists of a network of (N,K)Cl6 octahedra and Mg(H2O)6 octahedra occupying the cavities in this network. Its unit cell parameters are similar to those of ammonium carnallite. There are obvious differences between the crystal structure of carnallite and the compound. IR spectra show that both carnallite and ammonium chloride characteristic peaks are detected. The thermal behaviour was also investigated.

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ACKNOWLEDGMENTS

We gratefully acknowledge the National Natural Science Foundation of China (grant nos. U1407129, 21501061, 41073023), the Natural Science Foundation of Hubei Province (no. 2016CFB147), and Doctoral Fund Project of Huanggang Normal University (grant no. 2015001803) for financial support.

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Authors and Affiliations

  1. Key Laboratory of Comprehensive and High Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, 810008, Xining, PR China

    Hongjun Yang, Min Wang & Bing Li

  2. Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, 810008, Xining, PR China

    Hongjun Yang, Min Wang & Bing Li

  3. Hubei Key Laboratory for Processing and Application of Catalytic Materials, College of Chemical Engineering, Huanggang Normal University, 438000, Huanggang, PR China

    Yanmei Chen

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  1. Hongjun Yang
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  2. Yanmei Chen
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  3. Min Wang
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  4. Bing Li
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Correspondence to Bing Li.

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Yang, H., Chen, Y., Wang, M. et al. Synthesis, Crystal Structure, and Thermal Property of a Potassium-ammonium Double Salt K0.48(NH4)0.52MgCl3 · 6H2O. Crystallogr. Rep. 64, 277–281 (2019). https://doi.org/10.1134/S1063774519020135

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  • DOI: https://doi.org/10.1134/S1063774519020135

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