data_global
_chemical_name_mineral 'Hydroxylchondrodite'
loop_
_publ_author_name
'Yamamoto K'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 33 
_journal_year 1977
_journal_page_first 1481
_journal_page_last 1485
_publ_section_title
;
 The crystal structure of hydroxyl-chondrodite
;
_database_code_amcsd 0018884
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Mg5 Si2 O10 H2.3'
_cell_length_a 4.752
_cell_length_b 10.350
_cell_length_c 7.914
_cell_angle_alpha 108.71
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 368.666
_exptl_crystal_density_diffrn      3.063
_symmetry_space_group_name_H-M 'P 21/b 1 1'
loop_
_space_group_symop_operation_xyz
  'x,y,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_occupancy
_atom_site_U_iso_or_equiv
Mg1   0.50000   0.00000   0.50000   1.00000 ?
Mg2   0.00730   0.17550   0.30890   1.00000 ?
Mg3   0.48750   0.88380   0.07710   1.00000 ?
Si   0.07770   0.14080   0.70200   1.00000 ?
O1   0.77610   0.00270   0.29660   1.00000 ?
O2   0.72660   0.24460   0.12920   1.00000 ?
O3   0.22490   0.16760   0.52910   1.00000 ?
O4   0.26310   0.85660   0.29730   1.00000 ?
O5   0.26500   0.06000   0.10640   1.00000 ?
H1   0.15000   0.03000   0.06000   0.59000   0.01317
H2   0.42000   0.10000   0.20000   0.56000   0.01317
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
Mg1 0.00183 0.00584 0.00484 0.00000 0.00000 -0.00037
Mg2 0.00538 0.00487 0.00569 -0.00024 -0.00036 0.00112
Mg3 0.00435 0.00730 0.00626 0.00000 -0.00018 0.00223
Si 0.00092 0.00389 0.00370 0.00071 0.00054 0.00000
O1 0.00503 0.00389 0.00342 0.00165 0.00090 0.00037
O2 0.00309 0.00487 0.00399 -0.00071 0.00054 0.00112
O3 0.00252 0.00487 0.00399 -0.00047 0.00000 0.00112
O4 0.00366 0.00633 0.00455 -0.00094 0.00036 0.00000
O5 0.01544 0.00876 0.01679 0.00472 0.00992 0.00596