Calorimetry is used to study the enthalpy of the bounding compositions Pr3Se and Pr2Se3 of the Pr3–x Se4 phase (0 ≤ x ≤ 1/3) at 450–2300 K. The temperature–concentration dependences of the thermodynamic properties of Pr3–x Se4 selenides in the homogeneity range are determined at 298 ≤ T ≤ 2156 K. The Pr3–x Se4 enthalpy function has the following form: H(T, x) − H(298 K, x) = (2817 ⋅ 103 T −1 − 75912 + 234.6 ⋅ T − 4.718 ⋅ 10−2 T 2+ 2.624 ⋅ 10−5 T3) ⋅ e−0.2086x J/mole. An analysis of the partial enthalpies of Pr and Se shows that the chemical bonds between these elements change in simple substances and Pr3–x Se4.
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References
E. I. Yarembash and A. A. Eliseev, Chalcogenides of Rare-Earth Elements [in Russian], Nauka, Moscow (1975), p. 258.
A. V. Novoselova and V. B. Lazarev (eds.), Physical and Chemical Properties of Semiconductors [in Russian], Nauka, Moscow (1979), p. 340.
I. A. Smirnov, “Rare-earth semiconductors: Prospective development and application,” Zh. Vsesoyuz. Khim. Obshch., 26, No. 6, 602–611 (1981).
Kumta P. N., Risbud S. H. “Rare-earth chalcogenides⎯an emerging class of optical materials, Review”, J. Mater. Sci., 29, 1135–1158 (1994).
A. V. Prokofiev, A. I. Shelykh, A. V. Golubkov, and I. A. Smirnov, “Crystal growth and optical properties of rare earth sesquiselenides and sesquisulphides: New magneto-optic materials,” J. Alloys Compds., 219, 172–175 (1995).
T. M. Letcher, The Chemistry for the 21 st Century Monograph. Chemical Thermodynamics (IUPAC), Blackwell Science, Oxford (1999), p. 334.
A. S. Bolgrar, A. R. Kopan’, and N. P. Gorbachuk, “Thermodynamic properties of Pr3Se4 and Nd3Se4 at low temperatures,” Ukr. Khim. Zh., 68, No. 4, 87–91 (2002).
A. S. Bolgar, A. R. Kopan, and O. I. Kriklya, “Thermodynamic characteristics of praseodymium and neodymium sesquiselenides over a wide temperature range. A comparison of Schottky heat capacity contributions for selenides and in isostructural sulphides,” in: Proc. 6th Int. School on Phase Diagrams in Materials Science, Mater. Sci. Int. Services GmbH, Stuttgart (2004), pp. 192–198.
K. S. Mills, Thermodynamic Data for Inorganic Sulphides, Selenides, and Tellurides, Butterworth, London (1974), p. 846.
A. D. Finogenov and S. A. Semenkovich, “Standard entropies of rare-earth metals and their chalcogenides,” in: Chemical Bonding in Crystals of Semiconductors and Semimetals [in Russian], Nauka i Tekhnika, Minsk (1973), pp. 238–247.
T. Doert, C. Graf, P. Schmidt P, et al., “The Pr2Se3–PrSe2 system: Studies of the phase relationships and the modulated crystal structure of PrSe1.85,” J. Solid. State Chem., 180, 496–509 (2007).
O. Knacke, O. Kubaschewski, and K. Hesselmann, Thermochemical Properties of Inorganic Substances, Springer–Verlag, Heidelberg (1991), p. 1287.
M. Binnewies and E. Mielke, Thermochemical Data of Elements and Compounds, Wiley –VCH, Weinheim (1999).
N. Y. Pribilskii, I. G. Vasilieva, and R. S. Gamidov, “Phase equilibria of the Gd–Se system,” Mater. Res. Bull., 17, No. 9, 1147–1157 (1982).
K. A. Gschneider, Rare Earth Alloys, Van Nostrand, New York (1961).
M. Guittard, J. Flahaut, and M. Mepeltier, “Les seleniures interieures des elements des terres rares,” Bull. Soc. Сhim. France, No. 12, 4759–4765 (1968).
A. A. Eliseev, V. G. Kuznetsov, and G. N. Novitskaya, “On crystal structure and chemical bonds in selenides of rare-earth metals from the cerium subgroup,” in: Chemical Bonds in Crystals [in Russian], Nauka i Tekhnika, Minsk (1969), pp. 372–379.
A. S. Bolgar, A. G. Turchanin, and V. V. Fesenko, Thermodynamic Properties of Carbides [in Russian], Nakova Dumka, Kiev (1973), p. 272.
A. S. Bolgar, V. F. Litvinenko, A. G. Turchanin, et al., “Enthalpy and heat capacity of materials based on aluminum and boron nitrides,” in: Study of Nitrides [in Russian], Inst. Probl. Materialoved. NANU, Kiev (1975), pp. 83–87.
T. Ya. Kosolapova (ed.), Properties, Production, and Use of Refractory Compounds: Handbook [in Russian], Metallurgiya, Moscow (1986), p. 928.
V. F. Litvinenko and A. S. Bolgar, “Compute-aided calculation of the thermodynamic functions of variable composition,” in: Electron Structure and Properties of Refractory Compounds and Alloys and Their Use in Materials Science (Collected Scientific Papers) [in Russian], Inst. Probl. Materialoved. NANU, Kiev (2000), pp. 26–33.
V. F. Litvinenko and A. S. Bolgar, “High-temperature thermodynamic characteristics of transition metal mononitrides in homogeneity ranges,” Dokl. NAN Ukrainy, No. 3, 60–62 (1992).
V. F. Litvinenko and A. R. Kopan’, “Thermodynamic properties and high-temperature behavior of lanthanum selenides La3Se4–La2Se3,” Powder Metall. Met. Ceram., 47, No. 5–6, 466–471 (2008).
R. Hultgren, P. D. Desai, D. T. Hawkins, et al., Selected Values of the Thermodynamic Properties of the Elements, Amer. Soc. Metals, Ohio (1973), p. 610.
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Translated from Poroshkovaya Metallurgiya, Vol. 48, No. 1–2 (465), pp. 100–106, 2009.
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Litvinenko, V.F., Kopan’, A.R. High-temperature enthalpy of praseodymium selenides in the homogeneity range bounded by Pr3Se4 and Pr2Se3 . Powder Metall Met Ceram 48, 77–82 (2009). https://doi.org/10.1007/s11106-009-9094-y
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DOI: https://doi.org/10.1007/s11106-009-9094-y