Reference : Sur la diminution de densité qu'éprouvent certains corps à la suite d'une forte compr...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Sur la diminution de densité qu'éprouvent certains corps à la suite d'une forte compression et sur la raison probable de ce phénomène
[en] Diminution of the Density of Certain Substances Induced by Compression and the Cause of the Phenomenon
Spring, Walthère [Université de Liège - ULiège]
Recueil des Travaux Chimiques des Pays-Bas et de la Belgique
[en] Pressure ; Diffusion in Solids ; Density
[fr] Pression ; Diffusion dans les solides ; Densité
[en] Spring, Walthere. Recueil des Travaux Chimiques des Pays-Bas (1904), 23, 1-15; SciFinder (Chemical Abstracts Service: Columbus, OH); (accessed July 8, 2010).

In a previous communication (Abstr., 1884, 256), the author has shown that lead, zinc, ammonium sulphate, and ammonium alum, when strongly compressed, exhibit a diminished density. These observations have been extended to various metals by Kahlbaum, Roth and Siedler (Abstr., 1902, ii, 259), and to steel by Grunmach (Ann. Phys. Chem., 1889, 67, 227). It is now shown that specimens of lead, tin, cadmium, and silver which have been forced through small apertures under pressure exhibit slight diminutions from the normal densities of these metals, whereas bismuth, similarly prepared, shows an increase in density. Further, when two plates of the same metal, one having been compressed and the other being the metal in the normal condition, are simultaneously placed in an electrolyte, a slight permanent current is produced, in one direction with the first four metals, which expand on liquefaction, and in the opposite direction for bismuth, which contracts when liquefied. Other slight changes in physical properties are also induced by strong compression. The author suggests that these changes in density are due to the assumption by these substances under compression of the molecular condition characteristic of the liquid state.

Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved.
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