Abstract
Low temperature heat capacity of ammonium, rubidium and cesium perbromates has been studied by method of adiabatic calorimetry. Anomaly of the heat capacity of cesium perbromate has been found, which corresponds to a structural phase transition. The separation of heat capacity into components has been carried out by the additive scheme. The torsion oscillation of BrO −4 anions in solid perbromates at low temperatures has been found. Ammonium ions retardedly rotate aroundC 2 axes in the crystal lattice of NH4BrO4.
Zusammenfassung
Mittels adiabatischer Kalorimetrie wurde die Tieftemperatur-Wärmekapazität von Ammonium-, Rubidium- und Zäsiumperbromat untersucht. Man fand eine Anomalie für die Wärmekapazität von Zäsiumperbromat, in deren Hintergrund eine Phasenumwandlung steht. Anhand eines Additivschema wurde die Wärmekapazität in Komponenten gespalten. In festen Perbromaten fand bei man bei tiefen Temperaturen eine Torsionsschwingung der BrO −4 -Anionen. Die Ammoniumionen zeigen eine verlangsamte Rotation um die C2-Achsen im Kristallgitter von NH4BrO4.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Yu. Ya. Gurevich and Yu. M. Khakats, Results of Science and Technology, Chemistry of Solids, Vol. 4, VINITI, Moscow 1987.
P. S. Zheludkov, Physics of Crystals and Symmetry, Nauka, Moscow 1987.
P. Bernier, P. C. Stein, C. Lenoir and M. Zeliox, Bruker Rep., 1 (1987) 36.
H. Schulze, N. Weinstock, A. Muller and G. Vandrish, Spectrochim. Acta, 29A (1973) 1705.
V. K. Isupov, V. V. Gavrilov and I. S. Kirin, Zh. Neorg. Khim., 20 (1975) 1432.
F. Schreiner, D. W. Osborn, A. V. Pocious and E. H. Appelman, Inorg. Chem., 9 (1970) 2320.
E. Siegel, B. Tani and E. H. Appelman, Inorg. Chem., 8 (1969) 1190.
A. G. Tutov, V. V. Gavrilov and V. K. Isupovet al., Zh. Neorg. Khim., 31 (1986) 589.
E. Gebert, S. W. Peterson, A. U. Reis and E. H. Appelman, J. Inorg. Nucl. Chem., 43 (1981) 3085.
V. P. Tarasov, S. A. Petrushin and Yu. K. Gusev, Dokl. Akad. Nauk SSSR, 293 (1987) 1423.
V. P. Tarasov, S. A. Petrashin and Yu. K. Gusev, Zh Neorg. KHim., 33 (1988) 804.
V. P. Tarasov, V. I. Privalov and K. S. Gavrichevet al., Trans. All-Union Conf. ‘Quantum Chemistry and Spectroscopy of Solids’, Sverdlovsk 1989.
T. Penkalya, Crystallography, Khimiya, Leningrad 1974, p. 496.
T. J. Bastow, R. J. C. Brown and S. L. Segel, J. Chem. Phys., 89 (1988) 1203.
T. A. Al-Dhahir, G. Ragharama and H. L. Bhat, Phase Trans., 12 (1988) 205.
R. J. C. Brown, J. E. Callanan and T. L. Haslettet al., J. Chem. Thermodyn., 19 (1987) 1111.
P. K. Berkert, J. Mol. Struct., 83 (1982) 307.
Y. Sakamoto, J. Sc. Hirish Univ., 18 (1954) 95.
V. E. Gorbunov, V. M. Gurevich and K. S. Gavrichev, Zh. Fis. Khim., 56 (1982) 235.
V. S. Iorish and P. I. Tolmach, Zh. Fis. Khim., 60 (1986) 2583.
V. P. Tarasov, V. I. Privalov and K. S. Gavrichevet al., Koord. Khim., 16 (1990) 1603.
V. B. Lazarev, V. E. Gorbunov and G. A. Sharpatayaet al., XII Mendeleev's Congress on General and Applied Chemistry, Vol. 3, Nauka, Moscow 1981, p. 172.
E. F. Westrum Jr. and B. H. Justice, J. Chem. Phys., 50 (1969) 5083.
V. E. Gorbunov, K. S. Gavrichev and L. N. Golushinaet al., Zh. Fis. Khim., 64 (1990) 528.
V. E. Gorbunov, K. S. Gavrichev and G. A. Totrovaet al., Zh. Fis. Khim., 64 (1990) 274.
V. E. Gorbunov, K. S. Gavrichev and G. A. Sharpataya, Zh. Neorg. Khim., 33 (1988) 2678.
V. E. Gorbunov, K. S. Gavrichev and V. B. Lazarev, Zh. Fis. Khim., 60 (1986) 2067.
J. Koppi-Tommola, V. Davarayan, R. J. C. Brown and H. F. Schervell, J. Raman Spectr., 7 (1978) 96.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lazarev, V.B., Gavrichev, K.S. & Gorbunov, V.E. Calorimetric investigation of thermodynamic properties and ions rotation of some perbromates. Journal of Thermal Analysis 38, 865–872 (1992). https://doi.org/10.1007/BF01979418
Issue Date:
DOI: https://doi.org/10.1007/BF01979418