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 = 0.0001 GPa
;
_database_code_amcsd 0004407
_chemical_compound_source 'Synthetic'
_chemical_formula_sum '(Ca.2 Sr.8) Si2 Al2 O8'
_cell_length_a 8.370
_cell_length_b 12.967
_cell_length_c 14.262
_cell_angle_alpha 90.58
_cell_angle_beta 115.55
_cell_angle_gamma 90.44
_cell_volume 1396.342
_exptl_crystal_density_diffrn      3.009
_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   0.26910   0.00010   0.06690   0.20000   0.01500
Sr0   0.26910   0.00010   0.06690   0.80000   0.01500
Caz   0.26760   0.00640   0.56360   0.20000   0.00900
Srz   0.26760   0.00640   0.56360   0.80000   0.00900
Si100   0.00700   0.17100   0.10700   1.00000   0.00800
Al10z   0.00230   0.17590   0.61560   1.00000   0.00900
Al1m0   0.00300   0.81820   0.11790   1.00000   0.00900
Si1mz   0.00620   0.82460   0.60880   1.00000   0.01100
Al200   0.69200   0.11970   0.16750   1.00000   0.00900
Si20z   0.68270   0.11240   0.66870   1.00000   0.01200
Si2m0   0.68390   0.88470   0.17450   1.00000   0.01100
Al2mz   0.69330   0.87920   0.67220   1.00000   0.01000
OA10   0.00690   0.13050   0.99980   1.00000   0.01500
OA1z   0.99480   0.12830   0.49690   1.00000   0.01500
OA20   0.58850   0.99970   0.14200   1.00000   0.01700
OA2z   0.58750   0.00020   0.64140   1.00000   0.01200
OB00   0.82600   0.12240   0.10110   1.00000   0.01400
OB0z   0.80780   0.11890   0.60730   1.00000   0.01500
OBm0   0.80710   0.86980   0.11510   1.00000   0.01900
OBmz   0.82630   0.86580   0.60770   1.00000   0.01500
OC00   0.01620   0.29510   0.12410   1.00000   0.02000
OC0z   0.01880   0.30810   0.63720   1.00000   0.02000
OCm0   0.01370   0.68860   0.12480   1.00000   0.02100
OCmz   0.00940   0.69790   0.61190   1.00000   0.01500
OD00   0.18560   0.11820   0.19390   1.00000   0.01600
OD0z   0.19730   0.10930   0.70040   1.00000   0.02000
ODm0   0.19760   0.87790   0.20700   1.00000   0.01200
ODmz   0.18710   0.87160   0.69860   1.00000   0.01800