data_global
_chemical_name_mineral 'Glaucophane'
loop_
_publ_author_name
'Comodi P'
'Mellini M'
'Ungaretti L'
'Zanazzi P F'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 3 
_journal_year 1991
_journal_page_first 485
_journal_page_last 499
_publ_section_title
;
 Compressibility and high pressure structure refinement
 of tremolite, pargasite and glaucophane
 Sample: pressure at 37 kbar
;
_database_code_amcsd 0006417
_chemical_formula_sum 'Mg1.98 Fe1.42 Al1.6 (Na1.98 Li.02) Si8 O24 H2'
_cell_length_a 9.349
_cell_length_b 17.610
_cell_length_c 5.257
_cell_angle_alpha 90
_cell_angle_beta 103.9
_cell_angle_gamma 90
_cell_volume 840.146
_exptl_crystal_density_diffrn      3.269
_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
MgM1   0.00000   0.09170   0.50000   0.72000   0.02420
FeM1   0.00000   0.09170   0.50000   0.28000   0.02420
AlM2   0.00000   0.17910   0.00000   0.80000  -0.00380
FeM2   0.00000   0.17910   0.00000   0.20000  -0.00380
MgM3   0.00000   0.00000   0.00000   0.54000  -0.00250
FeM3   0.00000   0.00000   0.00000   0.46000  -0.00250
NaM4   0.00000   0.27790   0.50000   0.99000   0.02260
LiM4   0.00000   0.27790   0.50000   0.01000   0.02260
SiT1   0.28740   0.08670   0.29330   1.00000   0.00650
SiT2   0.29590   0.17250   0.80850   1.00000   0.00030
O1   0.11020   0.09180   0.20150   1.00000   0.00550
O2   0.11760   0.17130   0.74760   1.00000   0.01250
O-H3   0.11110   0.00000   0.70080   1.00000   0.01090
O4   0.36890   0.25370   0.79140   1.00000   0.00390
O5   0.36560   0.13350   0.09260   1.00000   0.01430
O6   0.35180   0.12120   0.58740   1.00000   0.00040
O7   0.34570   0.00000   0.30360   1.00000   0.00670