AM_Neighborite_15 Formula: (Na.5 K.5) Mg F3 Name: Neighborite Unit cell: 5.566 5.566 3.953 90.0 90.0 90.0 , V=122.47 Space group: P4/MBM (127)

Chakhmouradian A R , Ross K , Mitchell R H , Swainson I , Physics and Chemistry of Minerals , 28 (2001) p.277-284, The crystal chemistry of synthetic potassium-bearing neighborite, (Na1-xKx)MgF3, Sample studied by neutron diffraction, x = .5, One of two alternative models