Pressure–Temperature–Composition of Rare Earth–Hydrogen,Systems

Mulford, Roberta N.; Holley, Charles E.

doi:10.1021/j150534a009

Cited by 89 publications

(22 citation statements)

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“…For this purpose a deuterated lanthanum sample was examined by in-situ neutron powder diffraction as a function of deuterium pressure, and ab initio calculations were performed. Phase diagram data [6,7] suggested that temperatures close to 550 K and pressures between ∼ 10 −2 mbar and 10 bar provide a favourable pressure-composition regime for such a study.…”

Section: Introductionmentioning

confidence: 99%

Atom relaxations around hydrogen defects in lanthanum hydride

Renaudin

Yvon

Wolf

et al. 2005

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Atom relaxations around hydrogen defects in lanthanum hydride

Renaudin

Yvon

Wolf

et al. 2005

Journal of Alloys and Compounds

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“…Previous work investigating hydride formation often used high hydrogen pressures and a variety of temperatures [1,3,11]. Reactions were also left for several days.…”

Section: Discussionmentioning

confidence: 99%

“…The level of hydriding that occurs is strongly dependent upon the pre-treatment temperature and the pressure of hydrogen gas during the reaction [1]. Once prepared, lanthanide hydrides generally have relatively high hydrogen retention as well as high melting points.…”

Section: Introductionmentioning

confidence: 99%

Preparation and catalytic properties of cerium hydride

Jackson¹,

Kelly

Vass³

2008

Journal of Alloys and Compounds

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“…and Simon and Lange [42] (l0°to 13°K) . Using the data of Simon [ 41 ] and Simon and Lange [42], Kelley and King [20] calculated SRgg -Sg = 10.35 ±0.10 eu for Si02 glass.…”

Section: !Yomentioning

confidence: 93%

“…Using the data of Simon [ 41 ] and Simon and Lange [42], Kelley and King [20] calculated SRgg -Sg = 10.35 ±0.10 eu for Si02 glass. Westrum [ 5 ] lists as unpuMished measurements on the heat capacity of SIO 2 glass in the range 6°t o 300°K.…”

Section: !Yomentioning

confidence: 99%

Preliminary report on the thermodynamic properties of selected light-element and some related compounds:

1962

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This is the seventh semi-annual report on the current experimental, theoretical, and evaluative program, at the National Bureau of Standards, on the thermodynamic properties of selected light-element compounds of primary interest in high-temperature research. In this connection the chemical elements principally involved are H, Li, Be, B, C, N, 0, F, At, Cl, and Zr, with more secondary interest in the compounds of Mg, Si, K, Ti, Br, I, W, Hg, and Pb. The emphasis in the NBS work has been on the simpler compounds of these elements.This report includes some recent NBS measurements under the program: The heat of formation of nitronium perchlorate, and the high-temperature heat capacity of aluminum carbide. As discussed in the report, precise measurements are essentially completed on the heat of combustion of aluminum in fluorine and on the low-temperature heat capacities and absolute entropies of LiH, and LiAlH^; however, these data are not yet presented, pending the resolution of small discrepancies needed to put the results on a final basis. Tables of thermodynamic functions are given for four gases omitted from earlier reports (H 2 > 02> H , and electron gas), and, on the basis of improved data, for the condensed phases of two substances (BeF 2 and At^C^) . A contribution from those areas in which elaborate apparatus development is still progressing is a description in the report of a new fast-opening large-aperture shutter for high-speed photography. This development will be important in the study of combustions at very high temperatures and pressures.Also included are several up-to-date literature surveys in the field.One describes recent additions to the literature on the chemistry of numerous light-element compounds. A second describes alloys and intermetallic compounds of aluminum and beryllium with titajaium and zirconium; while a third survey covers low-temperature heat capacities aud entropies of various substances, particularly the oxides of eight light elements. The fourth report is a comprehensive and critical assembly of the available values for the heats of formation of a large number of compounds. IntroductionNitronium perchlorate is a v;hite, crystalline material, stable at temperatures up to 120°C. It is extremely hygroscopic, reacting rapidly with water to form nitric and perchloric acids. Aqueous solutions of potassium hydroxide were used in this investigation, as the potassium salts of the acids provided more suitable reference substances. The heats of solution of KN0_(c) and KClO/c) in KOH(aq) were also determined. Constants and Conversion FactorsThe results of this investigation are given in joules and calories, with 1 cal = 4*1840 joules. All weights are corrected to vacuum. The molecular weights are calculated from the 1957 International Table of Atomic Weights [l]. For N02C10/(c) an estimated heat capacity of 36 cal/deg mole was used; other auxiliary data were taken where possible from [2].3. MaterialsThe KNO^(c) and KC10/(c) were reagent-grade materials, dried at 120°...

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Pressure–Temperature–Composition of Rare Earth–Hydrogen,Systems

Cited by 89 publications

References 1 publication

Atom relaxations around hydrogen defects in lanthanum hydride

Atom relaxations around hydrogen defects in lanthanum hydride

Preparation and catalytic properties of cerium hydride

Preliminary report on the thermodynamic properties of selected light-element and some related compounds:

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