data_global
_chemical_name_mineral 'Slawsonite'
loop_
_publ_author_name
'Benna P'
'Nestola F'
'Ballaran T B'
'Balic-Zunic T'
'Lundegaard L F'
'Bruno E'
_journal_name_full 'American Mineralogist'
_journal_volume 92 
_journal_year 2007
_journal_page_first 1190
_journal_page_last 1199
_publ_section_title
;
 The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar:
 The I-1-I2/c and I2/c-P2_1/c phase transitions
 Sample: P = 6.2 GPa
;
_database_code_amcsd 0004410
_chemical_compound_source 'Synthetic'
_chemical_formula_sum '(Ca.2 Sr.8) Si2 Al2 O8'
_cell_length_a 8.128
_cell_length_b 12.671
_cell_length_c 13.866
_cell_angle_alpha 90
_cell_angle_beta 114.98
_cell_angle_gamma 90
_cell_volume 1294.470
_exptl_crystal_density_diffrn      3.245
_symmetry_space_group_name_H-M 'I 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-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
Ca   0.26540   0.00090   0.06850   0.20000   0.04300
Sr   0.26540   0.00090   0.06850   0.80000   0.04300
Si10   0.99550   0.17730   0.10700   1.00000   0.04400
Al1z   0.99330   0.17550   0.61760   1.00000   0.04300
Al20   0.68440   0.12430   0.17070   1.00000   0.04100
Si2z   0.67480   0.11310   0.67200   1.00000   0.04400
OA1   0.00270   0.12930   0.99810   1.00000   0.03400
OA2   0.58120   0.00330   0.14820   1.00000   0.05500
OB0   0.81860   0.11800   0.10450   1.00000   0.06000
OBz   0.79400   0.11710   0.60480   1.00000   0.05400
OC0   0.98840   0.30340   0.11410   1.00000   0.05400
OCz   0.99550   0.31150   0.62670   1.00000   0.05500
OD0   0.18320   0.12490   0.19430   1.00000   0.05400
ODz   0.19150   0.11710   0.70200   1.00000   0.05600