| abstract |
Alkaline earth metal compounds capable of producing alkaline earth metal oxides by heating, or rare earth compounds capable of producing rare earth oxides by heating, are reacted with carbon in a nitriding gas atmosphere to reduce and nitrate the alkaline earth metal compounds or rare earth compounds. In the meantime, the nitridosilicate compound is prepared by reacting with at least the silicon compound. Accordingly, high quality nitridosilicate compounds can be industrially produced at low cost. |