A moganite-type phase in the silica analog phosphorus oxynitride

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A moganite-type phase in the silica analog phosphorus oxynitride

机译：A moganite-type phase in the silica analog phosphorus oxynitride

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A new polymorph of phosphorus oxynitride (PON) a silica analog has been recovered at ambient pressure by quenching after a treatment at 850 °C under a pressure of 2.5 GPa using cristobalite- or quartz-type phases as starting materials. This PON polymorph is a thermodynamically stable phase with its own stability field in a P-T diagram. The structure of this PON phase was refined by the Rietveld method from an X-ray powder diffractogram. It is isostructural with “moganite” (SiO 2 ). The discovery of this PON polymorph should stimulate a renewed interest in the occurrence of this phase in the silica system, because “moganite” may have a small but defined P-T stability field. These results confirm the structure of “moganite” as a new structure-type in AX 2 compounds.

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《The American mineralogist》 |1999年第2期|207-210|共4页
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Laboratoire de Physico-Chimie des Matériaux, Centre National de la Recherche Scientifique, I place Aristide Briand, 92195 Meudon cédex, France;

Laboratoire des Verres et Céramiques, UMR CNRS 6512, Université de Rennes I, Campus de Beaulieu, Bat. 10,Avenue du Général Leclerc, 35042 Rennes cédex, France;

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A moganite-type phase in the silica analog phosphorus oxynitride

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