[NH3:1].N.N.N.N.N.[OH2:7].O.O.O.[OH:11][Mo:12](O)(=O)=O.[OH:16][Mo](O)(=O)=O.[OH:21][Mo](O)(=O)=O.[O:26]=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O>O>[NH3:1].[NH3:1].[NH3:1].[NH3:1].[NH3:1].[NH3:1].[OH2:11].[OH2:16].[OH2:21].[OH2:26].[OH2:7].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[OH2:11].[Mo:12].[Mo:12].[Mo:12].[Mo:12].[Mo:12].[Mo:12].[Mo:12]A first aqueous solution of ammonium heptamolybdate was prepared by dissolving 83.3 g of (NH4)6Mo7O24.4H2O in 380 ml H2O at ambient temperature; a second aqueous solution of nitrates by mixing at the ambient temperature the following three solutions:
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