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 = 4.4 GPa
;
_database_code_amcsd 0004409
_chemical_compound_source 'Synthetic'
_chemical_formula_sum '(Ca.2 Sr.8) Si2 Al2 O8'
_cell_length_a 8.209
_cell_length_b 12.780
_cell_length_c 14.009
_cell_angle_alpha 90
_cell_angle_beta 115.27
_cell_angle_gamma 90
_cell_volume 1329.057
_exptl_crystal_density_diffrn      3.161
_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   0.26720  -0.00050   0.06710   0.20000   0.02900
Sr   0.26720  -0.00050   0.06710   0.80000   0.02900
Si10   0.99930   0.17430   0.10710   1.00000   0.03700
Al1z   0.99640   0.17850   0.61690   1.00000   0.03300
Al20   0.68700   0.11980   0.17030   1.00000   0.03500
Si2z   0.67940   0.11250   0.67210   1.00000   0.03600
OA1   0.00190   0.12670   0.99780   1.00000   0.03800
OA2   0.58570   0.99500   0.14730   1.00000   0.04600
OB0   0.81850   0.12050   0.10250   1.00000   0.04200
OBz   0.79760   0.12550   0.60750   1.00000   0.04400
OC0   0.00120   0.30040   0.11770   1.00000   0.04700
OCz   0.00510   0.31350   0.63110   1.00000   0.05600
OD0   0.18640   0.12480   0.19750   1.00000   0.04700
ODz   0.19320   0.12070   0.70520   1.00000   0.04800