Figure 1. Tetragonal structure of (NH4)2MnCl4∙2H2O crystals.
Figure 2. Differential scanning calorimetry (DSC) thermogram of (NH4)2MnCl4∙2H2O upon heating
Figure 2. Thermogravimetric analysis (TGA) of (NH4)2MnCl4∙2H2O (inset: changes in transparency
Figure 3. Chemical shift in 1H magic-angle spinning nuclear magnetic resonance (MAS NMR) spectrum of (NH4)2MnCl4∙2H2O as a function of temperature (inset: 1H MAS NMR spectrum at 300 K, and spinning sideband is marked with asterisks).
Figure 4. Saturation recovery traces for delay time of 1H in (NH4)2MnCl4∙2H2O at 190, 270, 350, and 430 K.
Figure 6. Temperature dependences of the 1H spin-lattice relaxation time in the rotating frame T1ρ for H2O and NH4+ in (NH4)2MnCl4∙2H2O
Table 1. Phase transition temperatures (TC), crystal structures, and 1H spin-lattice relaxation time in the rotating frame (T1ρ) values of (NH4)2MnCl4∙2H2O and (NH4)2CuCl4∙2H2O.
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