data_9003811
_publ_section_title
;
 Crystal chemistry of NaMgF3 perovskite and high pressure and temperature
 Sample: P = 4 GPa, T = 900 C
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1534
_journal_page_last               1539
_journal_paper_doi               10.2138/am.2005.1708
_journal_volume                  90
_journal_year                    2005
_chemical_formula_sum            'F3 Mg Na'
_chemical_name_mineral           Neighborite
_space_group_IT_number           62
_symmetry_space_group_name_Hall  '-P 2c 2ab'
_symmetry_space_group_name_H-M   'P b n m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   5.4480
_cell_length_b                   5.4677
_cell_length_c                   7.7366
_cell_volume                     230.458
_diffrn_ambient_pressure         4e+06
_diffrn_ambient_temperature      1173.15
_exptl_crystal_density_diffrn    3.006
_[local]_cod_chemical_formula_sum_orig 'Na Mg F3'
_cod_database_code               9003811
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,y,1/2-z
-x,-y,1/2+z
1/2+x,1/2-y,1/2+z
1/2-x,1/2+y,1/2-z
1/2-x,1/2+y,z
1/2+x,1/2-y,-z
-x,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na 0.99670 0.01910 0.25000 0.12100
Mg 0.00000 0.50000 0.00000 0.05300
F1 0.03070 0.47880 0.25000 0.58000
F2 0.72400 0.28350 0.02950 0.07700
