data_global
_chemical_name_mineral 'Pargasite'
loop_
_publ_author_name
'Makino K'
'Tomita K'
_journal_name_full 'American Mineralogist'
_journal_volume 74 
_journal_year 1989
_journal_page_first 1097
_journal_page_last 1105
_publ_section_title
;
 Cation distribution in the octahedral sites of hornblendes
 sample P-P from Parau Island
;
_database_code_amcsd 0001270
_chemical_formula_sum '(Si5.96 Al2.04) Mg3.83 Fe1.31 Ca1.86 Na2.28 O24 H2'
_cell_length_a 9.834
_cell_length_b 18.01
_cell_length_c 5.297
_cell_angle_alpha 90
_cell_angle_beta 105.04
_cell_angle_gamma 90
_cell_volume 906.017
_exptl_crystal_density_diffrn      3.305
_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
Si1   0.28160   0.08520   0.30090   0.60000   0.00494
Al1   0.28160   0.08520   0.30090   0.40000   0.00494
Si2   0.29140   0.17250   0.81130   0.89000   0.00494
Al2   0.29140   0.17250   0.81130   0.11000   0.00494
Mg1   0.00000   0.08790   0.50000   0.75900   0.00849
Fe1   0.00000   0.08790   0.50000   0.24100   0.00849
Mg2   0.00000   0.17680   0.00000   0.76300   0.00519
Fe2   0.00000   0.17680   0.00000   0.23700   0.00519
Mg3   0.00000   0.00000   0.00000   0.76400   0.00595
Fe3   0.00000   0.00000   0.00000   0.23600   0.00595
Ca4   0.00000   0.27850   0.50000   0.93000   0.01153
Mg4   0.00000   0.27850   0.50000   0.01100   0.01153
Fe4   0.00000   0.27850   0.50000   0.05900   0.01153
NaAm   0.02920   0.50000   0.12450   0.57000   0.03141
NaA2   0.00000   0.47930   0.00000   0.57000   0.02989
O1   0.10740   0.08740   0.21600   1.00000   0.01001
O2   0.11970   0.17330   0.73160   1.00000   0.00861
O-H3   0.10870   0.00000   0.71570   1.00000   0.01064
O4   0.36720   0.24970   0.78750   1.00000   0.01140
O5   0.34950   0.14030   0.11000   1.00000   0.01140
O6   0.34400   0.11650   0.60700   1.00000   0.01254
O7   0.33930   0.00000   0.27450   1.00000   0.01368