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Systemes metaux alcalins-oxygene

6ème partie+: analyse thermique du monooxyde de cesium Cs2O

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Abstract

The thermal behaviour of cesium monoxide (Cs2O) was determined by differential thermal analysis, thermogravimetry and X-ray diffraction. The use of several materials as sample holders was necessary to clarify the properties of this oxide. The melting point of Cs2O was found to be 495±5°, and its vapour pressure equal to 10−4 torr at 240°. No allotropic transformation was observed.

Résumé

Le comportement thermique du monooxyde de césium Cs2O a été déterminé par analyse thermique différentielle, thermogravimétrie et diffraction X. L'utilisation de différents matériaux pour contenir ce produit a été nécessaire pour cerner les phénomènes propres à cet oxyde. On trouve la température de fusion de Cs2O=495±5° et sa pression de vapeur égale à 10−4 Torr à 240°. Aucune transformation allotropique n'est mise en évidence.

Zusammenfassung

Es wird über die DTA, TG und röntgenographische Untersuchung des Caesium monoxyds berichtet. Verschiedene Materien als Probenbehälter wurden herangezogen damit die dem Oxyd eigene Eigenschaften klar festgelegt werden können. Der Schmelzpunkt von Cs2O liegt bei 495±5°, der Dampfdruck beträgt 10−4 Torr bei 240°. Es fand keine allotrope Umwandlung statt.

Резюме

Было определено терм ическое поведение ок иси цезия Cs2O с помощью терм ического анализа, термогравим етрии и диффракции ре нтгеновых лучей. Представлялос ь необходимым исследо вать несколько матер иалов, содержащих это вещес тво, для оценки собственных явлений окиси цезия. Нашли, что точка плавления окиси цези я 495±5 °C, а давление паров равн о 10−4 тор при 240 °С. Аллотр опных превращений не наблю дали.

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Touzain, P. Systemes metaux alcalins-oxygene. Journal of Thermal Analysis 9, 441–450 (1976). https://doi.org/10.1007/BF01909410

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  • DOI: https://doi.org/10.1007/BF01909410

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