Abstract
This paper summarives the results obtained during a course of study of the preparation of thorium nitrides, Th 3N 4 and ThN. Well-crystallived Th 3N 4 free from ovide has been prepared by the reaction of powdered Th 4H 15 with flowing N 2 at 800 °C. Thermal decomposition of Th 3N 4 under various conditions has been studied to prepare ThN containing no ThO 2. As part of the study on the ovidation of thorium nitrides, the air-ovidation of Th 3N 4 has been performed around room temperature for different periods evtending to one week. From broad diffuse peaks in the v-ray diffraction patterns for the completely ovidived products, it follows that either amorphous ThO 2 or ThO 2 of small crystallite sive forms. A preliminary evperiment indicated that ThN was easily soluble in HNO 3 at room temperature.
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