data_global
_chemical_name_mineral 'Bigcreekite'
loop_
_publ_author_name
'Basciano L C'
'Groat L A'
'Roberts A C'
'Gault R A'
'Dunning G E'
'Walstrom R E'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 39 
_journal_year 2001
_journal_page_first 761
_journal_page_last 768
_publ_section_title
;
 Bigcreekite: A new barium silicate mineral species from Fresno County, California
;
_database_code_amcsd 0005718
_chemical_compound_source 'Fresno County, California, USA'
_chemical_formula_sum 'Ba Si2 O9 H8'
_cell_length_a 5.0453
_cell_length_b 9.044
_cell_length_c 18.366
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 838.035
_exptl_crystal_density_diffrn      2.739
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-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
_atom_site_U_iso_or_equiv
Ba   0.18514   0.25000   0.55389   0.01610
Si   0.16660   0.07197   0.20374   0.00880
O(1)   0.38060   0.01460   0.26490   0.01330
O(2)   0.21390   0.00680   0.12480   0.01570
O(3)   0.17000   0.25000   0.20390   0.01590
Wat(4)   0.19450   0.25000   0.02460   0.02170
Wat(5)   0.20190   0.04100   0.44100   0.02640
Wat(6)   0.25400   0.25000   0.84480   0.03950
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
Ba 0.02450 0.01540 0.00840 0.00000 0.00081 0.00000
Si 0.00980 0.01120 0.00540 -0.00010 0.00030 -0.00090
O(1) 0.00970 0.01530 0.01480 -0.00140 -0.00150 0.00320
O(2) 0.01920 0.01870 0.00910 0.00020 0.00230 -0.00350
O(3) 0.01770 0.01240 0.01760 0.00000 -0.00120 0.00000
Wat(4) 0.02360 0.02430 0.01710 0.00000 0.00130 0.00000
Wat(5) 0.02230 0.04080 0.01620 -0.00400 0.00180 -0.00720
Wat(6) 0.06890 0.01910 0.03060 0.00000 -0.02600 0.00000