data_9010120
_publ_section_title
;
 Rietveld structure refinement of perovskite and post-perovskite phases of
 NaMgF3 (neighborite) at high pressures
 Locality: synthetic
 Sample: (c), P = 54 GPa
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1703
_journal_page_last               1706
_journal_paper_doi               10.2138/am.2006.2308
_journal_volume                  91
_journal_year                    2006
_chemical_formula_structural     NaMgF3
_chemical_formula_sum            'F3 Mg Na'
_space_group_IT_number           63
_symmetry_space_group_name_Hall  '-C 2c 2'
_symmetry_space_group_name_H-M   'C m c m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   2.7164
_cell_length_b                   8.381
_cell_length_c                   6.8487
_cell_volume                     155.919
_diffrn_ambient_pressure         5.4e+07
_exptl_crystal_density_diffrn    4.443
_[local]_cod_chemical_formula_sum_orig 'Na Mg F3'
_cod_database_code               9010120
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,z
x,-y,1/2+z
1/2+x,1/2-y,1/2+z
-x,y,1/2-z
1/2-x,1/2+y,1/2-z
-x,y,z
1/2-x,1/2+y,z
x,-y,-z
1/2+x,1/2-y,-z
x,y,1/2-z
1/2+x,1/2+y,1/2-z
-x,-y,1/2+z
1/2-x,1/2-y,1/2+z
-x,-y,-z
1/2-x,1/2-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Na 0.00000 0.24220 0.25000
Mg 0.00000 0.00000 0.00000
F1 0.50000 0.44330 0.25000
F2 0.50000 0.13850 0.05790
