???????? ??????? ????? metatungstate ??? ????????? ?? AMT ???? ????? ?????, ??? ?? ?????? ?? ?? ?????, ??????? metatungstate ???? ??? ????????? ????? ?????. ???????? ????? ??????? ?????? ?????? ?????? ?????? ???? ????????? ???? ???, ?? ????? ?????? ?????? ?????????? ??????, ????? ????????? ??? ?????? ?????? ??????? ???????. ???? ?????? ???????? ????????? ???? ?????? ?????? ???????? ???? ????? ??????, ???? ?????? ????????, ???????? ect ..

??????? metatungstate ???? ?????? ????? ?????????? ????? ?????. ???? ???????? ?????? ???? ??? 200-300 ????? ??????, ???? AMT ?? ?? ???? ?????? ???? ?????? ???????; ????? ???? ????? C 300-350 ° ????? ???? ?????? ??????? metastable; ???? ????? ???????? ?????? ???? ?? 500 ~ 550 ° C, ???? ???? ?? ??????? ???? ??????? ????? ?? ?????; ????? ????????? ???? ? -600 ????? ?????? ?????, ??????? metatungstate ???? ?????? ??????? ???? trioxide ??????? (WO _{3 ); ???? ????????? ?????? ? 700 ????? ??????, holded ???? 2 ????, ?????? ?????? trioxide ??????? mesoporous ?????.}