Zirconium thermodynamic propertie

Ackermann RJ, Rauh EG, Alexander CA (1975) The thermodynamic properties of gaseous zirconium oxide. High Temp Sci 7 304... 

At atmospheric pressure and 298 K, zirconium has a hexagonal close packed structure which is called a-zirconium. The crystal structure of this phase has been determined by a number of workers at, or around, 298 K and values for a and c from these studies are summarised in Table V-1. The selected values are the average of the data listed in the table and are in good agreement with those selected by Fernandez Guillermet [87FER] (3.2316 and 5.1475 x 10m for a and c, respectively) in a review of the thermodynamic properties of zirconium (the value for a in Table 4 of [87FER] is written incorrectly as 0.3216 nm and should read 0.32316 nm). 

The thermal functions of Zr(g) listed in Table V-7 are those derived by [85CHA/DAV] (or calculated from those values listed by [85CHA/DAV]). The equations listed above for the heat capacity of zirconium gas and equations for other thermodynamic properties derived from these equations reproduce the values listed in Table V-7 to within 0.5%. As is evident from the data presented in the table, the heat capacity exhibits a maximum at about 435 K and a minimum at 975 K. This behaviour also occurs for other metals such as titanium and iron. 

DOU] Douglas, T. B., The zirconium-hydrogen system some thermodynamic properties from a heat content study, J. Am. Chem. Soc., 80, (1958), 5040-5046. Cited on page 133. 

WES/FEI2] Westrum, Jr., E. F., Feick, G., Zirconium carbide Heat capacity and thermodynamic properties from 5 to 350 K, J. Chem. Eng. Data, 8, (1963), 176-178. Cited on pages 209, 210. 

FUN/UCH] Funaki, K., Uchimura, K., Sublimation pressures and some thermodynamic properties of zirconium and hafnium tetrachlorides, Report LA-TR-6763, (1965). Cited on pages 168, 170. 

SID/AKI] Sidorov, L. N., Akishin, P. A., Shol ts, V. B., Korenev, Y. M., Mass-spectrometric study of the thermodynamic properties of the sodium fluoride-zirconium tetrafluoride system. III. Temperature variation of the partial pressures and the thermodynamic properties of the condensed phase, Russ. J. Phys. C/zew., 39, (1965), 1146-1150. Cited on page 150. 

BOL/GUS] Bolgar, A. S., Guseva, E. A., Fesenko, V. V., Thermodynamic properties of zirconium and hafnium carbides over the range of 298-2500 K, Poroshk. Metall, 49, (1967), 40-43. Cited on page 209. 

POT] Potter, N. D., The heats of formation of the gaseous subchlorides of zirconium. Appendix 5, In Thermodynamic properties of propellant combustion produc. Air Force Office of Scientific Research report. Report AFOSR 70-2311 TR, (1970). Cited on pages 170, 171. 

EFI/PRO] Efimov, M. E., Prokopenko, L V., Tsirelnikov, V. L, Troyanov, S. L, Medvedev, V. A., Berezovskii, G. A., Paukov, L E., Thermodynamic properties of zirconium chlorides. I. The standard molar enthalpy of formation, the low-temperature heat capacity, the standard molar entropy, and the standard molar Gibbs energy of formation of zirconium trichloride, J. Chem. Thermodyn., 19, (1987), 353-358. Cited on pages 163, 164, 333,335,338. 

VAS/LYT] Vasil ev, V. P., Lytkin, A. I., Chernyavskaya, N. V., Thermodynamic properties of zirconium and hafnium hydroxides in aqueous solution, Russ. J. Inorg. Chem., 43, (1998), 394-397. Cited on pages 116, 343. 

Ackermaim, R. J., Rauli, E. G., Thermodynamic properties of zirconium oxide (g) and hafnium oxide (g).Critical examination of iso-molecular oxygen-exchange reactions, J. Chem. Phys., 60, (1974), 2266-2271. Cited on pages 113,783. 

Johnson GK, Murray WT, Van Deventer EH, Flotow HE (1985) The thermodynamic properties of zirconium diteUuride ZrTe2-1500 K. J Chem Thermodyn 17 751-760 Fuger J (1992) Transuranium-element thermochemistry a look into the past—a glimpse into the future. J Chem Thermodyn 24 337-358... 

Table 2.9 Thermodynamic properties and molecular complexities of titanium, zirconium, and hafnium alkoxides...

Gerasimov et have provided a reference book on the thermodynamic properties of tungsten, molybdenum, titanium, zirconium, niobium, and tantalum, and their more important compounds, viz. oxides, sulphides, halides, carbides, nitrides, silicates, borides, and hydrides. 

This is one of the most detailed studies of the thermodynamic and structural properties of elemental zirconium. The experimental work in the study was conducted in four parts, including the determination of the heat capacity of zirconium from 14 to 300 K the heat content from 1100 to 1800 K the vapour pressure from 1951 to 2056 K and the crystal structure from 300 to 1600 K. The results of the work were published in [51SKI/JOH], [51SK1/EDW], [53SKI/JOH]. 

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