data_global
_chemical_name_mineral 'Mejillonesite'
loop_
_publ_author_name
'Atencio D'
'Chukanov N V'
'Nestola F'
'Witzke T'
'Coutinho J M V'
'Zadov A E'
'Contreira R R'
'Farber G'
_journal_name_full 'American Mineralogist'
_journal_volume 97 
_journal_year 2012
_journal_page_first 19
_journal_page_last 25
_publ_section_title
;
 Mejillonesite, a new acid sodium, magnesium phosphate mineral,
 from Mejillones, Antofagasta, Chile
;
_database_code_amcsd 0018764
_chemical_compound_source 'Mejillones, Antofagasta, Chile'
_chemical_formula_sum 'Na Mg2 P2 O11 H7'
_cell_length_a 16.295
_cell_length_b 13.009
_cell_length_c 8.434
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1787.853
_exptl_crystal_density_diffrn      2.352
_symmetry_space_group_name_H-M 'P b c a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+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   0.03220   0.88390   0.93410   0.02180
Mg1   0.24340   0.88320   0.94810   0.01280
Mg2   0.24370   0.88810   0.33900   0.01270
P1   0.13820   0.05340   0.14270   0.00970
P2   0.14320   0.78760   0.64630   0.01000
O11   0.19330   0.02970   0.29030   0.01540
O12   0.11800   0.17030   0.13610   0.01650
O13   0.18700   0.02430   0.99020   0.01800
O14   0.05850   0.99100   0.15070   0.02250
O21   0.19300   0.81300   0.14330   0.01800
O22   0.15990   0.64250   0.00800   0.02220
O23   0.15020   0.84200   0.80540   0.02060
O-H24   0.04750   0.74510   0.12630   0.02380
Ow   0.98970   0.87480   0.34940   0.03270
OZ1   0.18660   0.24920   0.88950   0.02000
OZ2   0.17010   0.42910   0.13470   0.02210
H1   0.17300   0.48600   0.82100   0.05300
H2   0.16000   0.24900   0.17900   0.04400
H3   0.13500   0.44800   0.06800   0.05300
H4   0.00500   0.60400   0.96400   0.02400
H5   0.14200   0.21200   0.95900   0.05200
H6   0.00000   0.82000   0.31900   0.05500