Octahedral As in <i>M</i>^+^ arsenates ‒ architecture and seven new members
Schwendtner, Karolina; Kolitsch, Uwe; Acta Crystallographica Section B 63 (2007) 205–215; doi:10.1107/S0108768106054942

data_2102802
_publ_section_title
;
 Octahedral As in <i>M</i>^+^ arsenates -- architecture and seven new
 members
;
_journal_coeditor_code           SN5044
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              205
_journal_page_last               215
_journal_paper_doi               10.1107/S0108768106054942
_journal_volume                  63
_journal_year                    2007
_chemical_formula_structural     'Li1 H2 As3 O9'
_chemical_formula_sum            'As3 H2 Li O9'
_chemical_formula_weight         377.72
_chemical_name_common            'lithium hydrogen arsenate'
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 117.86(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.666(2)
_cell_length_b                   8.553(2)
_cell_length_c                   9.970(2)
_cell_measurement_reflns_used    2800
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      32.577
_cell_measurement_theta_min      2.037
_cell_volume                     728.7(3)
_computing_cell_refinement       'HKL SCALEPACK (Otwinowski & Minor 1997)'
_computing_data_collection       'COLLECT (Nonius, 2003)'
_computing_data_reduction
'HKL DENZO, SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'Diamond (Brandenburg, 2005)'
_computing_publication_material  'SHELXL97 (Sheldrick, 1997a)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997a)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997b)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0124
_diffrn_reflns_av_sigmaI/netI    0.0176
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            5128
_diffrn_reflns_theta_full        32.55
_diffrn_reflns_theta_max         32.55
_diffrn_reflns_theta_min         2.42
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    13.698
_exptl_absorpt_correction_T_max  0.4070
_exptl_absorpt_correction_T_min  0.2331
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'HKL SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    3.443
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'large plates'
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.670
_refine_diff_density_min         -0.860
_refine_ls_extinction_coef       0.0087(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.135
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         2642
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.135
_refine_ls_R_factor_all          0.0203
_refine_ls_R_factor_gt           0.0169
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0175P)^2^+0.6130P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0403
_refine_ls_wR_factor_ref         0.0413
_reflns_number_gt                2426
_reflns_number_total             2642
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sn5044.cif
_cod_data_source_block           LiH2As3O9
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_original_formula_sum        'H2 As3 Li O9'
_cod_database_code               2102802