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High-temperature Enthalpy and X-ray Powder Diffraction Data for Aluminum Sulfide (Al2s3).
MISSING :10 pages
High-temperature enthalpy and x-ray powder diffraction studies were conducted on aluminum sulfide (al2s3) as part of the Bureau of Mines effort to provide new data for the advancement of mineral technology consistent with environmental preservation and energy conservation. Relative enthalpies were measured with a copper-block calorimeter from 298.15 to 879 k. Tabulated values are listed for heat capacity, entropy, Gibbs energy functions, and relative enthalpies between 298.15 and 900 k. Enthalpies were also given in the form of an equation and combined with published data to calculate standard enthalpies of formation and Gibbs energies of formation for reactions of crystalline aluminum with crystalline, liquid, and gaseous diatomic sulfur. The hexagonal, rhombohedral, and cubic phases of al2s3 were identified by x-ray powder diffraction studies, and the indexed powder diffraction patterns of these phases are given. The hexagonal phase was stable to about 852 k and was partially converted to the rhombohedral form at 879 k.
IH; Report of Investigation;
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division