AM_Bi4O7 Formula: Bi4 O7 Name: Bi4O7 Unit cell: 6.7253 6.995 7.7961 72.566 88.842 76.925 , V=340.39 Space group: P-1 (2)

Dinnebier R E , Ibberson R M , Ehrenberg H , Jansen M , Journal of Solid State Chemistry , 163 (2002) p.332-339, The crystal structures of the binary valence compound Bi3BiO7 and isotypic, Bi3SbO7 as determined by high resolution X-ray and neutron powder diffraction