CaSeO~4~·0.625H~2~O ‒ water channel occupation in a bassanite related structure
Fritz, Susanne; Schmidt, Horst; Paschke, Iris; Magdysyuk, Oxana V.; Dinnebier, Robert E.; Freyer, Daniela; Voigt, Wolfgang; Acta Crystallographica Section B 67 (2011) 293–301; doi:10.1107/S0108768111018544

data_2104972
_publ_section_title
;
 CaSeO~4~&#x00B7;0.625H~2~O -- water channel occupation in a bassanite
 related structure
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              293
_journal_page_last               301
_journal_paper_doi               10.1107/S0108768111018544
_journal_volume                  67
_journal_year                    2011
_chemical_formula_sum            'Ca H1.25 O4.625 Se'
_chemical_formula_weight         194.30
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           154
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 32 2"'
_symmetry_space_group_name_H-M   'P 32 2 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            24
_cell_length_a                   14.1681(2)
_cell_length_b                   14.1681(2)
_cell_length_c                   13.4241(2)
_cell_measurement_pressure       101.3
_cell_measurement_reflns_used    100
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      55
_cell_measurement_theta_min      1
_cell_volume                     2333.67(6)
_computing_cell_refinement       Apex2
_computing_data_collection       Apex2
_computing_data_reduction        Apex2
_computing_molecular_graphics    'Diamond 3'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker X8 Kappa. Apex2'
_diffrn_measurement_method       'omega and phi 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  0.0538
_diffrn_reflns_av_sigmaI/netI    0.0373
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            25493
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         1.66
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    10.851
_exptl_absorpt_correction_T_max  0.7476
_exptl_absorpt_correction_T_min  0.6946
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    3.318
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2214
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.035
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.569
_refine_diff_density_min         -0.590
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.551(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     258
_refine_ls_number_reflns         3584
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.054
_refine_ls_R_factor_all          0.0514
_refine_ls_R_factor_gt           0.0329
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0052P)^2^+3.9550P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0683
_refine_ls_wR_factor_ref         0.0738
_reflns_number_gt                2801
_reflns_number_total             3584
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            sn5102.cif
_cod_data_source_block           296K
_cod_original_cell_volume        2333.68(6)
_cod_original_formula_sum        'Ca  H1.25 O4.625  Se'
_cod_database_code               2104972
_cod_database_fobs_code          2104972