Thermodynamic properties of the cubic plutonium hydride solid solution

Technical Report · Tue Dec 01 00:00:00 EST 1981

DOI:https://doi.org/10.2172/5704187· OSTI ID:5704187

Haschke, J M

Pressure, temperature, and composition data for the cubic solid solution plutonium hydride phase, PuH/sub x/, have been measured by microbalance methods. Integral enthalpies and entropies of formation have been evaluated for the composition range 1.90 less than or equal to X less than or equal to 3.00. At 550/sup 0/K, ..delta..H/sup 0/ /sub f/(PuH/sub x/(s)) varies linearly from approximately (-38 +- 1) kcal mol/sup -1/ at PuH/sub 190/ to (-50 +- 1 kcal mol/sup -1/) at PuH/sub 3/ /sub 00/. Thermochemical values obtained by reevaluating tensimetric data from the literature are in excellent agreement with these results. Isotopic effects have been quantified by comparing the results for hydride and deuteride, and equations are presented for predicting ..delta..H/sup 0/ /sub f/ and ..delta..S/sup 0/ /sub f/ values for PuH/sub x/(s) and PuD/sub x/(s).

• Research Organization: Rockwell International Corp., Palo Alto, CA (USA). Energy Systems Group
• DOE Contract Number: AC04-76DP03533
• OSTI ID: 5704187
• Report Number(s): RFP-3099; ON: DE82005211; TRN: 82-004737
• Country of Publication: United States
• Language: English

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ISOTOPE EFFECTS
PLUTONIUM HYDRIDES
THERMODYNAMIC PROPERTIES
CHEMICAL COMPOSITION
CUBIC LATTICES
ENTROPY
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HIGH TEMPERATURE
QUANTITY RATIO
ACTINIDE COMPOUNDS
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ODD-ODD NUCLEI
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