Electrical and thermal properties of polycrystalline Li2SO4 and Ag2SO4

Crystal and electronic structure, lattice dynamics and thermal properties of Ag(i)(SO3)R (R = F, CF3) Lewis acids in the solid state

“…The product of thermal decomposition of AgSO 3 F at 500 • C and cooled down to room temperature is white; its XRD and IR spectra (ESI †) indicate that this is indeed mostly Ag 2 SO 4 with some residual AgSO 3 F. Thus, Ag(I)SO 3 F decomposes thermally in a similar way as do fluorosulfates of Sr and Ba. 52 A sharp endothermic peak is seen at 424 • C, close to the value that was previously erroneously assigned as a melting temperature of AgSO 3 F. 20 In fact, this peak corresponds to an orthorhombic-tohexagonal phase transition of Ag(I) 2 SO 4 , reported to take place at 425 • C. 53 In conclusion, the main channel of the thermal decomposition of both AgSO 3 R derivatives studied in this work may be described by a generalized reaction equation:…”

Silver(II) Fluorosulfate: A Thermally Fragile Ferromagnetic Derivative of Divalent Silver in an Oxa‐Ligand Environment

“…[28] 2AgSO 3 F Ǟ Ag 2 SO 4 + SO 2 F 2 Ȇ (-16.7 wt.-%) (11) Ag 2 SO 4 is the ultimate product of thermal decomposition at 400°C as confirmed by XRD and IR spectroscopy as well as the presence of the characteristic sharp endothermic peak of its phase transition at 425°C in the DSC profile [29] ( Figure 5). …”

Acoustic Shock Wave-Induced Amorphous to Crystalline Phase Transitions of Li2SO4─Raman Spectroscopic and Thermal Calorimetric Approach

“…Note that as per the literature reports on the thermal properties of the title sample, there is no report found for the amorphous state (both the translational and librational disorder-induced amorphous states). β-Li 2 SO 4 is transformed into the α-Li 2 SO 4 at 575 °C, which can be slightly changed based on the heating rates. − So, in this aspect, it is not possible to find direct evidence for the translational and librational disorder-induced amorphous states, but the clear indication of the formation of β-Li 2 SO 4 based on the transition temperature points of the β–α-Li 2 SO 4 can be authenticated. ,,− The zoomed-in transition temperature regions of β–α-Li 2 SO 4 with respect to the number of shock pulses are presented in Figure b, wherein a few changes could be seen in the respective transition temperature points such that the observed values are 581, 582.7, 585, and 580 °C for the 0, 1, 2, and 3 shocked conditions, respectively. The observed values of the transition temperature point are quite high compared to the reported values, and such a kind of shift in the transition temperature points that the higher temperature is quite common. − The crystalline counterparts have higher transition points than the amorphous counterparts, and similar results are also found in the crystalline to the amorphous transitions of NiSO 4 ·6H 2 O under shocked conditions. , Note that among the four transition temperature points, the second shocked condition’s point is quite high compared to the other shocked samples’ transition temperature points (Figure ), whereby a clear indication for the formation of β-Li 2 SO 4 is ensured. ,− Note that in the case of β-Li 2 SO 4, the coupling of Li–SO 4 is quite stable because of the high compressibility; it requires quite a higher thermal energy to induce phase transition in β–α-Li 2 SO 4 compared to the other samples. ,− As seen in Figure , both the amorphous states of the control and the third shocked sample have almost similar transition points, whereas at the first shocked condition, the transition point is slightly increased, which is due to the formation of the glassy state, which is well corroborated with the previously reported XRD results …”