????? ????????, ???? ????? ??????? ??? (W-Sn) ????? ??? ???, ??? ?? ????? ??? ?????? ??????? ?? ??? ?????? ??????? ?? ??? ??????, ????? ?????? ???????. ????? ???? ??? ????? ??????? ??? ???? ????? ????, ??? ????? ???? ???? ????? ?? ??? ????? ?? ????? ?????, ?????? ???? ?? ????? ?????? ???? paratungstate ??????? ?? ?? ?????.

?????? ?? ???? ????? ????? paratungstate ??????? (APT) ? W-Sn ????? ?? ??? ???:
1. ?? ?? ????? W-Sn ????? ???, ???? ?????, ????? ???? ?? ????? ?? ????? ???? ????? ????? ?????? ??? ????? ????? ???? ?? ??????? ??? ???? ??????? ?? ????? ?????;
2. ????? ????? ???????? ??????? ???? ???? ????? ???????? ?? ??? ??????, ???? ?? ??? ?????;
3. ???? ?? ?????? ??????? ??????? ??? ????? ????? ?? ??? ?'? ????? ????????????, ??? ???? ?? ?????? ?????? ?????? ????? desorption ?????? ????? ?????, ????? ???????? ??????? ???, hydroxide ???? ???? ???? desorption,
4. ????? ?? APT ???? ????? ?? ??? ?????, ??????? ?????? ????? ???????;
5. ???? ??? ?????? ????? ?? ??? ????? ?? ???? ?? ????? ?? ??? ?????, ??????, ????? ?? ????? ??.