Institute;
of;
Molecule;
and;
Crystal;
Engineering,School;
of;
Chemistry;
and;
Chemical;
Engineering,Henan;
University,Kaifeng;
475001,China;
Institute;
of;
Molecule;
and;
Crystal;
Engineering,School;
of;
Chemistry;
and;
Chemical;
Engineering,Henan;
University,Kaifeng;
475001,China;
Institute;
of;
Molecule;
and;
Crystal;
Engineering,School;
of;
Chemistry;
and;
Chemical;
Engineering,Henan;
University,Kaifeng;
475001,China;
silicotungstic; acid,; Keggin; structure,; crystal; structure,; polyoxometalates,; rare; earth; metal.;