data_global
_chemical_name_mineral 'Gillespite'
loop_
_publ_author_name
'Miletich R'
'Allan D R'
'Angel R J'
_journal_name_full 'American Mineralogist'
_journal_volume 82 
_journal_year 1997
_journal_page_first 697
_journal_page_last 707
_publ_section_title
;
 The synthetic Cr2+ silicates BaCrSi4O10 and SrCrSi4O10: The missing links in
 the gillespite-type ABSi4O10 series
 SrCrSi4O10
;
_chemical_formula_sum 'Sr Cr Si4 O10'
_cell_length_a 7.4562
_cell_length_b 7.4562
_cell_length_c 15.5414
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 864.023
_exptl_crystal_density_diffrn      3.167
_symmetry_space_group_name_H-M 'P 4/n c c'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2-y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2-z'
  '1/2+y,-x,-z'
  '1/2-y,x,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2+x,1/2+y,-z'
  '1/2-x,1/2-y,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,1/2+x,-z'
  'y,1/2-x,z'
  '1/2-x,y,1/2+z'
  '1/2+x,-y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Sr   0.25000   0.75000   0.00000
Cr   0.25000   0.25000   0.08564
Si   0.50962   0.92707   0.15094
O1   0.46361   0.96361   0.25000
O2   0.71284   0.99735   0.13192
O3   0.37015   0.01058   0.08572
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Sr 0.01459 0.01459 0.01566 0.00000 0.00000 0.00000
Cr 0.01036 0.01036 0.02007 0.00000 0.00000 0.00000
Si 0.01014 0.01205 0.01517 0.00003 0.00059 -0.00012
O1 0.03104 0.03104 0.02117 -0.00369 0.00687 -0.00687
O2 0.01222 0.02371 0.02276 -0.00265 -0.00153 0.00364
O3 0.01296 0.01084 0.03084 0.00366 -0.00669 0.00299