data_global
_chemical_name_mineral 'Phase-B-anhydrous'
loop_
_publ_author_name
'Finger L W'
'Hazen R M'
'Prewitt C T'
_journal_name_full 'American Mineralogist'
_journal_volume 76 
_journal_year 1991
_journal_page_first 1
_journal_page_last 7
_publ_section_title
;
 Crystal structures of Mg12Si4O19(OH)2 (phase B) and Mg14Si5O24 (phase AnhB)
;
_database_code_amcsd 0001340
_chemical_formula_sum 'Si5 Mg14 O24'
_cell_length_a 5.868
_cell_length_b 14.178
_cell_length_c 10.048
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 835.959
_exptl_crystal_density_diffrn      3.435
_symmetry_space_group_name_H-M 'P m c b'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2-z'
  '-x,1/2-y,1/2+z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,y,z'
  'x,-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
Si1   0.00000   0.00000   0.00000   0.00418
Si2   0.50000   0.31141   0.17445   0.00443
Si3   0.00000   0.37524   0.99754   0.00431
Mg1   0.50000   0.00000   0.50000   0.00595
Mg2   0.50000   0.17460   0.35469   0.00583
Mg3   0.50000   0.00000   0.00000   0.00608
Mg4   0.24050   0.00241   0.25354   0.00557
Mg5   0.00000   0.17612   0.82058   0.00608
Mg6   0.24396   0.16958   0.08108   0.00583
O1   0.00000   0.91394   0.34705   0.00595
O2   0.00000   0.57564   0.35375   0.00469
O3   0.00000   0.24165   0.49605   0.00570
O4   0.50000   0.08599   0.17186   0.00557
O5   0.50000   0.42488   0.16958   0.00532
O6   0.50000   0.76001   0.47153   0.00557
O7   0.23420   0.08741   0.42136   0.00570
O8   0.21470   0.42653   0.42534   0.00595
O9   0.28240   0.76221   0.25276   0.00608