data_global
_chemical_name_mineral 'Sanidine'
loop_
_publ_author_name
'Onorato E'
'Penta M'
'Sgarlata F'
_journal_name_full 'Periodico di Mineralogia'
_journal_volume 32 
_journal_year 1963
_journal_page_first 1
_journal_page_last 34
_publ_section_title
;
 Struttura del Sanidino
 Note: Occupancies not provided, estimated using Kroll & Ribbe, 1983
;
_database_code_amcsd 0020562
_chemical_compound_source 'Alban Hills, Rome Province, Latium, Italy'
_chemical_formula_sum 'K (Si3 Al) O8'
_cell_length_a 8.48
_cell_length_b 12.97
_cell_length_c 7.18
_cell_angle_alpha 90
_cell_angle_beta 115.98
_cell_angle_gamma 90
_cell_volume 709.895
_exptl_crystal_density_diffrn      2.604
_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
K   0.28290   0.00000   0.13660   1.00000   0.02660
SiR1   0.00890   0.18420   0.22350   0.74400   0.01089
AlR1   0.00890   0.18420   0.22350   0.25600   0.01089
SiR2   0.70730   0.11780   0.34400   0.75600   0.01077
AlR2   0.70730   0.11780   0.34400   0.24400   0.01077
O1   0.63030   0.00000   0.28330   1.00000   0.01849
O2   0.00000   0.14550   0.00000   1.00000   0.01849
O3   0.82730   0.14470   0.22720   1.00000   0.02064
O4   0.03350   0.30940   0.25610   1.00000   0.01938
O5   0.18040   0.12560   0.40550   1.00000   0.01900