in methanol; water the solution was heated in a H2O bath to 40-50 ° C for 6 hours and left to gel; following the gel formation the gel was dehydrated to a powder at 600 ° C;; x-ray analysis;;
参考文献
Covino; Nissan
Materials Research Bulletin, 1986 , vol. 21, # 3 p. 337 - 344
in benzene
heating with excess acid to 90-100°C in a sealed ampoule;;
参考文献
Stepovik, L. P.; Dodonov, V. A.; Vaulina, E. N.; Sofronova, S. M.
Journal of General Chemistry USSR (English Translation), 1992 , vol. 62, p. 709 - 713
Zhurnal Obshchei Khimii, 1992 , vol. 62, p. 861 - 866
