Sur les modifications subies par quelques phosphates acides à la suite d'une compression ou d'une déformation mécanique

Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1907), 193-211; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010).

The author shows by expts. that: (1) Mech. deformation of primary phosphates involves their partial decompn. This commences with elimination of water of hydration and terminates with liberation of a certain amt. of phosphoric acid. The reversion of certain phosphates is facilitated by deformation. The decompn. appears to be more profound when the compds. resulting from it are liqs., i.e., in a form susceptible of elimination under pressure. The success or failure of the reaction is, then, directly connected with the mech. rather than the chem. conditions affecting the matter. (2) The primary phosphates of Ca and Na, probably also that of Li, form mol. combinations with the resp. sulfates. With calcium compds. this combination appears insol. in water and its formation can contribute to the reversion of the acid phosphates.

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