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 = 3.2 GPa
;
_database_code_amcsd 0004408
_chemical_compound_source 'Synthetic'
_chemical_formula_sum '(Ca.2 Sr.8) Si2 Al2 O8'
_cell_length_a 8.256
_cell_length_b 12.842
_cell_length_c 14.088
_cell_angle_alpha 90.51
_cell_angle_beta 115.38
_cell_angle_gamma 90.88
_cell_volume 1349.142
_exptl_crystal_density_diffrn      3.114
_symmetry_space_group_name_H-M 'I -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+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
Ca0   0.26750   0.00330   0.06740   0.20000   0.01900
Sr0   0.26750   0.00330   0.06740   0.80000   0.01900
Caz   0.26620   0.00590   0.56450   0.20000   0.01300
Srz   0.26620   0.00590   0.56450   0.80000   0.01300
Si100   0.00230   0.16910   0.10610   1.00000   0.01000
Al10z   0.99920   0.17250   0.61540   1.00000   0.00900
Al1m0   0.99850   0.81820   0.11760   1.00000   0.01100
Si1mz   0.00160   0.81930   0.60840   1.00000   0.00900
Al200   0.68810   0.11980   0.16740   1.00000   0.01000
Si20z   0.67900   0.11050   0.66780   1.00000   0.01100
Si2m0   0.67930   0.88410   0.17510   1.00000   0.01000
Al2mz   0.68830   0.87650   0.67240   1.00000   0.01000
OA10   0.00310   0.12600   0.99720   1.00000   0.01300
OA1z   0.99640   0.13360   0.49810   1.00000   0.01400
OA20   0.58290   0.99290   0.14330   1.00000   0.01900
OA2z   0.58290   0.99720   0.64500   1.00000   0.01800
OB00   0.82090   0.11250   0.09910   1.00000   0.01900
OB0z   0.79960   0.11880   0.60280   1.00000   0.01700
OBm0   0.80180   0.86420   0.11270   1.00000   0.01700
OBmz   0.82100   0.86740   0.60680   1.00000   0.01700
OC00   0.00430   0.29670   0.12140   1.00000   0.01200
OC0z   0.01160   0.30350   0.63970   1.00000   0.01700
OCm0   0.00720   0.68640   0.12280   1.00000   0.01900
OCmz   0.99870   0.69130   0.61160   1.00000   0.01800
OD00   0.18600   0.12090   0.19250   1.00000   0.01500
OD0z   0.19660   0.11670   0.70010   1.00000   0.01800
ODm0   0.19770   0.87680   0.20840   1.00000   0.01700
ODmz   0.18770   0.87130   0.69940   1.00000   0.01700