#------------------------------------------------------------------------------
#$Date: 2010-01-30 13:59:17 +0000 (Sat, 30 Jan 2010) $
#$Revision: 966 $
#$URL: svn://www.crystallography.net/cod/cif/1/1008038.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_1008038
_chemical_name_systematic          'Strontium bis(dihydrogenarsenate)'
_chemical_formula_structural       'Sr (H2 As O4)2'
_chemical_formula_sum            'As2 H4 O8 Sr'
_[local]_cod_chemical_formula_sum_orig 'H4 As2 O8 Sr'
_publ_section_title
;
Structure cristalline du monoarseniate diacide de strontium Sr (H~2~ As
O~4~)~2~
;
loop_
_publ_author_name                  'Boudjada, A'
_journal_name_full                 'Acta Crystallographica B (24,1968-38,1982)'
_journal_coden_ASTM                ACBCAR
_journal_volume                    35
_journal_year                      1979
_journal_page_first                1050
_journal_page_last                 1052
_cell_length_a                     8.707(2)
_cell_length_b                     7.872(3)
_cell_length_c                     5.939(1)
_cell_angle_alpha                  86.354(6)
_cell_angle_beta                   110.335
_cell_angle_gamma                  112.241(6)
_cell_volume                       352.2
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'P -1'
_symmetry_Int_Tables_number        2
_symmetry_cell_setting             triclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Sr2+   2.000
  As5+   5.000
  O2-   -2.000
  H1+    1.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Sr1   Sr2+   2 i 0.08550(5) 0.19660(5) 0.26706(7) 1.  0 d
  As1   As5+   2 i 0.34850(6) 0.24243(6) -0.14075(8) 1.  0 d
  As2   As5+   2 i 0.19358(6) 0.76737(6) 0.36348(8) 1.  0 d
  O1    O2-    2 i 0.1816(4) 0.0648(4) -0.3150(6) 1.  0 d
  O2    O2-    2 i 0.3852(4) 0.3994(4) -0.3517(6) 1.  0 d
  O3    O2-    2 i 0.5476(5) 0.2095(5) 0.0276(6) 1.  0 d
  O4    O2-    2 i 0.3205(4) 0.3310(4) 0.0811(6) 1.  0 d
  O5    O2-    2 i 0.0554(5) 0.6675(4) 0.5515(7) 1.  0 d
  O6    O2-    2 i 0.1311(4) 0.9070(4) 0.1651(6) 1.  0 d
  O7    O2-    2 i 0.1787(5) 0.5774(5) 0.2089(6) 1.  0 d
  O8    O2-    2 i 0.4013(4) 0.8608(5) 0.5619(6) 1.  0 d
  H1    H1+    2 i -1. -1. -1. 4.  0 dum
_refine_ls_R_factor_all            0.024
_cod_database_code 1008038