Heat capacity and thermal expansion of neodymium hafnate ceramics

Experimental determination of the enthalpy of formation of the pyrochlore rare‐earth hafnates

“…Several findings have been reported for the high‐temperature heat capacity and enthalpy increment measurements: pyrochlore La 2 Hf 2 O 7 have been measured by Babu and Nagarajan, 21 Kopan et al., 22 Liang et al., 23 Vorozhtcov et al., 24 and Guskov et al 25 26 as well as for Nd 2 Hf 2 O 7 16 . The data for Sm 2 Hf 2 O 7 was reported by López‐Cota et al., 27 Kandan et al., 28 and Guskov et al 17 .…”

“…Several findings have been reported for the hightemperature heat capacity and enthalpy increment measurements: pyrochlore La 2 Hf 2 O 7 have been measured by Babu and Nagarajan, 21 Kopan et al, 22 Liang et al, 23 Vorozhtcov et al, 24 and Guskov et al 25 ; data for Pr 2 Hf 2 O 7 was obtained only by Guskov et al, 26 as well as for Nd 2 Hf 2 O 7 . 16 The data for Sm 2 Hf 2 O 7 was reported by López-Cota et al, 27 Kandan et al, 28 and Guskov et al 17 High-temperature heat capacity of pyrochlore Eu 2 Hf 2 O 7 was reported by a number of authors. 21,[27][28][29] The data for Gd 2 Hf 2 O 7 was presented in several papers.…”

“…The heat capacity of Pr 2 Hf 2 O 7 was investigated in the temperature range 0-25 K by Craig 10 (although the experimental method is not described in the thesis), Yaraskavitch, 11 Sibille et al, 12 Anand et al 13,14 (1.8300 K), and Guskov et al 15 in the larger temperature ranges. Low-temperature adiabatic calorimetry was applied by Guskov et al 16 for the determination of heat capacity of Nd 2 Hf 2 O 7 (18.9-347.6 K) and in the earlier work by Anand et al 9 can be found the data from PPMS measurements. For the pyrochlore Sm 2 Hf 2 O 7 , the measurements have been carried out only by Guskov et al 17 (4-347 K).…”

“…in the larger temperature ranges. Low‐temperature adiabatic calorimetry was applied by Guskov et al 16 . for the determination of heat capacity of Nd 2 Hf 2 O 7 (18.9–347.6 K) and in the earlier work by Anand et al 9 .…”

Heat capacity and thermodynamic functions of di-,tri- and tetramethylammonium lead iodide perovskites from 289 to 473 K

“…Many authors focused their attention on determining the thermodynamic properties of their solid-tosolid and solid-to-liquid phase transitions [16][17][18], molar heat capacities and fusion thermodynamic properties to get close information on intermolecular forces and crystal packing arrangements [19][20][21][22][23].…”