A Novel Cyclic Heteropolyanion [{WO(H_2O)}_3(AsW_8O31)_3]~21-
Liu Bin;Xue Ganglin;Wang Jiwu;Zhao Jianshe;He Shuiyang;Shi Qizhen
Acta Chimica Sinica . 2003, (10): 1608 -1611 .