Glass forming tendency in Ga-Ge-S glasses : a structural approach

We have studied by EXAFS glasses that belong to the Ga2S3-GeS2 line around Ga and Ge K edges. Both tetrahedral GaS4 and GeS4 units are evidenced and low temperature measurements reveal ordering around germanium atoms up to 4 Å

Le système eau-pyroglutamate de zinc : déshydratation et réhydratation des composés de coordination

The relative stabilities of the (S-S) and (R-R, S-S) diaquabis(pyroglutamato)zinc(II) phases, both derived from density and solubility data, and thermal behaviour under pressure, are discussed. These phases dehydrate into amorphous and crystalline anhydrous phases upon heating, which rehydrate at room temperature under saturating water vapour through mechanisms that depend on crystallinity and presumably on diastereo-isomerism