A garnet lherzolite xenolith hosted in olivine nephelinite from Xilong,Zhejiang Province ,southeastern China, shows clear evidence of modal metasomatism involvi
K2NbOF5·H2O and K2TaF7 were prepared through melting Nb2O5 and Ta2O5 respectively with FHF2·2H2O, followed by recrystallizing .The hydrolysis properti