Thermodynamic data for the condensed phases of 78 elements as currently used by SGTE (Scientific Group Thermodata Europe) are tabulated. SGTE is a consortium of seven organisations in Western Europe engaged in the compilation of a comprehensive, self consistent and authoritative thermochemical database for inorganic and metallurgical systems. The data are being published here in the hope that they will become widely adopted within the international community as a sound basis for the critical assessment of thermodynamic data, thereby, perhaps, limiting unnecessary duplication of effort. The data for each phase of each element considered aie presented as expressions showing, as a function of temperature, the variation of (a) G-HSER, the Gibbs energy relative to the enthalpy of the “Standard Element Reference” ie the reference phase for the element at 298.15 K and (b) the difference in Gibbs energy between each phase and this reference phase (ie lattice stability). The variation of the heat capacity of the various phases and the Gibbs energy difference between phases are also shown graphically. For certain elements the thermodynamic data have been assessed as a function of pressure as well as temperature. Where appropriate a temperature— pressure phase diagram is also shown.

Throughout this paper the thermodynamic data are expressed in terms of J mol−1. The temperatures of transition between phases have been assessed to be consistent with the 1990 International Temperature Scale (ITS90).

SGTE data for pure elements

Sluggish diffusion in Co-Cr-Fe-Mn-Ni high-entropy alloys

http://myweb.clemson.edu/~daw/D_reprints/MatSciRep.v9p251y93.pdf

The embedded-atom method: a review of theory and applications

I. Introduction. Background. Focus of the review. Review procedure and results. The NEA-TDB data base system. Presentation of the selected data. II. Standards and Conventions. Symbols, terminology and nomenclature. Units and conversion factors. Standard and reference conditions. Fundamental physical constants. III. Selected Uranium Data. IV. Selected Auxiliary Data. V. Discussion of Data Selection. Elemental uranium. Aqua ions. Oxide, hydride and hydroxide species. VI. Discussion of Auxiliary Data Selection. Reference list. Authors list. Formula list. Discussion of selected references. Ionic strength corrections. Assigned uncertainties. The estimation of entropies.

Chemical thermodynamics of uranium

A comprehensive review is presented of the extractive metallurgy of rare earths. The topics covered are: world rare earth resources and production; ore processing and separation of individual rare earths; reduction, refining, and ultrapurification of rare earth elements; methods for rare earth materials analysis; and a selection of the numerous rare earth applications. World rare earth reserves are abundant and would last for well beyond the next century. However, all of the 16 naturally occurring rare earth elements are not equally distributed in the ore minerals. This, compounded with the problems specific to the isolation and recovery of each of the rare earths, sets the stage for an unequal rare earth availability. The close chemical similarity of rare earths looses its importance when divergent physical properties determine the processes for rare earth element reduction and refining. The rare earth metals, alloys, and compounds have been as pure as could be determined. Finally, the commercial...

Extractive Metallurgy of Rare Earths

: This volume, together with its companion, Selected Values of Thermodynamic Properties of the Elements, represents a complete revision of the work, Selected Values of Thermodynamic Properties of Metals and Alloys, by Hultgren, Orr, Anderson, and Kelley, published in 1963 by John Wiley and Sons, New York. The work should cover pertinent data available at the date printed on the first page of each system. Inspection will show that many or most of the selected values differ from the 1963 edition; many of the differences are substantial. This shows progress in measurement and, at the same time, hints of uncertainties still present.

Selected values of the thermodynamic properties of binary alloys

: Contents: Methods of evaluation, atomic weights, fundamental constants, symbols and units, general references, and properties of the elements.

Selected Values of the Thermodynamic Properties of the Elements

Molybdenum trioxide (MoO3) was reduced by hydrogen at temperatures between 300° and 450°C. The weight lost during each reduction experiment was followed using an automatic recording balance. X-ray diffraction analysis of the reduction product and the weight-loss data confirm the formation of a suboxide of molybdenum having a composition between Mo2O and MoO.

Hydrogen reduction of MoO 3 at temperatures between 300° and 450°C

https://escholarship.org/content/qt7qv0n58g/qt7qv0n58g.pdf?t=p0wthw

The effect of ordering on lattice heat capacities ordered and disordered AuCu

The torsion .effusion method has been used to measure the vapor pressure of lead over pure lead and eight lead-tin alloys ranging from 9. 1 to' 8 7. 9 at. o/o lead in the temperature range 9 50° -112 5°K. The resulting .6.~ 298 = .46627 ± 200 cal/gm -atom for pure lead is in excellent agreement v, XS . with previous work. De~ived l:I.GPb values for the alloys were smoothed and correlated with previous heat of formation data to obtain entropies for the liquid alloys. Values for the tin component were calculated by Gibbs-Duhem integration. No surfac.e depletion was found for these liquid a11oys, in contrast to· previous measurements on solid Fe-Mn alloys.

/pdf/vapor-pressure-of-lead-and-activity-measurements-of-liquid-3fyidwyyjy.pdf

Donald T. Hawkins

Papers

Selected values of the thermodynamic properties of binary alloys

Selected Values of the Thermodynamic Properties of the Elements

Hydrogen reduction of MoO 3 at temperatures between 300° and 450°C

The effect of ordering on lattice heat capacities ordered and disordered AuCu

Vapor pressure of lead and activity measurements of liquid lead-tin alloys by the torsion effusion method