chromite (53percent Cr2O3) heated with Si (97.85percent) at 1300°C and 1E-4 Torr;
参考文献
Doklady Akademii Nauk SSSR, , vol. 61, p. 495 - 498
C.A., , p. 8736
Cr: MVol.A1, 5.1.1, page 213 - 217
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反应条件
anaerobic conditions; the mixture was ground, added to a pyrex ampoule, sealed under vacuum, shaken for 1 min; the temperature was increased to 500 ° C; annealing for 4-10 h at 550 ° C;; cooling to room temperature 2 ° C/min; trituration with THF or methanol;;
in melt placing of mixt. of Cr with SnF2 (molar ratio SnF2:Cr=2.05) in Fluoroplast-4 ampule, closing by screwed stopper, exposition for 1.75 h at 230°C; various product ratio yields for various conditions; cooling, stirring up in water, collection, drying;
参考文献
Goryacheva; Rakov; Solov'ev
Russian Journal of Inorganic Chemistry, 2001 , vol. 46, # 7 p. 949 - 952
