data_global
_chemical_name_mineral 'Tincalconite'
loop_
_publ_author_name
'Luck R L'
'Wang G'
_journal_name_full 'American Mineralogist'
_journal_volume 87 
_journal_year 2002
_journal_page_first 350
_journal_page_last 354
_publ_section_title
;
 On the nature of tincalconite
;
_database_code_amcsd 0002764
_chemical_formula_sum 'Na2 B4 O11.667 H8.667'
_cell_length_a 11.1402
_cell_length_b 11.1402
_cell_length_c 21.207
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 2279.270
_exptl_crystal_density_diffrn      1.866
_symmetry_space_group_name_H-M 'R 3 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  '-x,-x+y,-z'
  '2/3-x,1/3-x+y,1/3-z'
  '1/3-x,2/3-x+y,2/3-z'
  'y,x,-z'
  '2/3+y,1/3+x,1/3-z'
  '1/3+y,2/3+x,2/3-z'
  'x-y,-y,-z'
  '2/3+x-y,1/3-y,1/3-z'
  '1/3+x-y,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+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
Na1   0.00000   0.00000   0.00000   1.00000   0.01900
Na2  -0.33050   0.00000   0.00000   1.00000   0.02600
Na3  -0.66667  -0.33333   0.07400   1.00000   0.04400
B1   0.26660   0.09250   0.11840   1.00000   0.01600
B2  -0.51430   0.09190   0.12070   1.00000   0.02500
O1  -0.66667   0.20020   0.16667   1.00000   0.01300
O2  -0.50290   0.12220   0.18360   1.00000   0.02200
O3  -0.62490   0.07490   0.08550   1.00000   0.02300
O-h4   0.19520   0.12940   0.07210   1.00000   0.01700
O-h5  -0.41680   0.07180   0.09150   1.00000   0.04800
O11  -0.19910   0.24430  -0.03220   1.00000   0.03500
O12  -0.62790  -0.44920   0.17050   0.33333   0.06600
H121  -0.61740  -0.44330   0.20890   0.16667   0.09900
H122  -0.64030  -0.49400   0.13750   0.16667   0.09900
H4   0.14900   0.14800   0.09380   1.00000   0.03100
H5  -0.35400   0.08800   0.11110   1.00000   0.05900
H111  -0.15400   0.27700   0.00710   1.00000   0.06900
H112  -0.13700   0.25500  -0.04720   1.00000   0.06700