Pb_2Bi_(0.2)Nb_2O_(7.3)-A New Compound with Pyrochlore-type Layer Superstructure
Wang Peiling Wu Jindi Li Deyu (Shanghai Institute of Ceramics,Academia Sinica)
Pb_2Bi_(0.2)Nb_2O_(7.3)——a new compound with pyrochlore-type layer superstructure,prepared for the first time.X-ray Laue photograph,oscillation photograph and Weissen-berg photograph of the new compound have been taken.The results indicate that thissingle crystal belongs to trigonal system.Its Laue group is 3m.The lattice parametersare a=7.467(1)(?), c=66.14(1)(?).