data_global
_chemical_name_mineral 'Artinite'
loop_
_publ_author_name
'Akao M'
'Iwai S'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 33 
_journal_year 1977
_journal_page_first 3951
_journal_page_last 3953
_publ_section_title
;
 The hydrogen bonding of artinite
 Note: anisotropic displacement parameters obtained from ICSD
;
_database_code_amcsd 0009620
_chemical_formula_sum 'Mg C.5 O4 H4'
_cell_length_a 16.560
_cell_length_b 3.153
_cell_length_c 6.231
_cell_angle_alpha 90
_cell_angle_beta 99.10
_cell_angle_gamma 90
_cell_volume 321.249
_exptl_crystal_density_diffrn      2.033
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Mg   0.31587   0.00000   0.15203   1.00000 ?
C   0.42330   0.00000   0.62026   0.50000 ?
O-h   0.23884   0.50000   0.17079   1.00000 ?
Ow   0.39988   0.50000   0.08992   1.00000 ?
O1   0.36702   0.00000   0.46852   1.00000 ?
O2   0.45155   0.35820   0.70358   0.50000 ?
H1   0.22200   0.50000   0.27500   1.00000   0.04433
H2   0.44300   0.50000   0.17400   1.00000   0.03420
H3   0.40800   0.50000   0.03900   1.00000   0.04179
H4   0.39500   0.19500   0.52800   0.50000   0.07219
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Mg 0.01020 0.00900 0.01000 0.00000 -0.00140 0.00000
C 0.01150 0.01720 0.00920 0.00000 0.00210 0.00000
O-h 0.01290 0.01020 0.00960 0.00000 0.00250 0.00000
Ow 0.00990 0.01670 0.01340 0.00000 0.00110 0.00000
O1 0.02230 0.02480 0.01620 0.00000 -0.00490 0.00000
O2 0.01670 0.01850 0.01940 -0.00140 -0.00230 -0.00150