Neighborite
Chakhmouradian A R, Ross K, Mitchell R H, Swainson I
Physics and Chemistry of Minerals 28 (2001) 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
_database_code_amcsd 0008544
3.9354 3.9354 3.9354 90 90 90 Pm3m
atom     x     y   z occ Biso
Na      .5    .5  .5  .5  1.0
K       .5    .5  .5  .5  1.0
Mg       0     0   0      -.6
F       .5     0   0     2.05