neutron and synchrotron X-ray powder diffraction data to adopt a layered structure in which
the oxygen and fluorine are ordered and located in different layers. … In O F which shows
fluorine—oxygen ordering in a Ruddlesden— Popper type phase. We report here the
synthesis and structural characterization of a new family of ordered oxyfluorides, Sr MO F (M"Al,
Ga). They crystallize in a layered structure in which layers made of isolated MO …