data_global
_chemical_name_mineral 'Holtite'
loop_
_publ_author_name
'Groat L A'
'Grew E S'
'Evans R J'
'Pieczka A'
'Ercit T S'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 73 
_journal_year 2009
_journal_page_first 1033
_journal_page_last 1050
_publ_section_title
;
 The crystal chemistry of holtite
 Sample: H1
;
_database_code_amcsd 0019925
_chemical_compound_source 'Voroni Tundry, Kola Peninsula, Murmanskaja Oblast, Russia'
_chemical_formula_sum 'Al6.32 Ta.32 Si2.61 Sb.238 As.152 B O17.61'
_cell_length_a 4.6818
_cell_length_b 11.867
_cell_length_c 20.302
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1127.957
_exptl_crystal_density_diffrn      3.737
_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_occupancy
_atom_site_U_iso_or_equiv
Al1   0.40099   0.75000   0.25024   0.55000   0.01537
Ta1   0.40099   0.75000   0.25024   0.32000   0.01537
Al2   0.55777   0.61051   0.47331   0.98500   0.00540
Al3   0.05959   0.49029   0.43152   0.98500   0.00530
Al4   0.06075   0.35985   0.29022   0.91500   0.00790
Si1   0.08680   0.75000   0.40833   0.87000   0.00540
Sb1   0.11090   0.75000   0.38610   0.06600   0.01070
As1   0.11090   0.75000   0.38610   0.06400   0.01070
Si2   0.58750   0.52050   0.32972   0.87000   0.00550
Sb2   0.60910   0.55960   0.31736   0.08600   0.00890
As2   0.60910   0.55960   0.31736   0.04400   0.00890
B   0.22800   0.25000   0.41560   1.00000   0.00700
O1   0.37770   0.75000   0.45681   1.00000   0.00720
O2   0.16130   0.75000   0.33042   0.87000   0.01040
O3   0.89430   0.63873   0.42518   1.00000   0.00680
O4   0.40390   0.43460   0.28240   1.00000   0.00820
O5   0.39420   0.54999   0.39419   1.00000   0.00690
O6   0.88110   0.45102   0.35231   1.00000   0.00780
O7   0.65850   0.63330   0.28894   0.87000   0.01160
O8   0.17520   0.25000   0.34978   1.00000   0.01000
O9   0.25390   0.35050   0.44768   1.00000   0.00740
O10   0.75680   0.25000   0.27390   1.00000   0.01090
O11   0.75010   0.46706   0.48832   1.00000   0.00540