Stoichiometry-dependent structures: an X-ray and neutron single-crystal diffraction study of the effect of reaction stoichiometry on the crystalline products formed in the potassium–cyanurate system
G. S. Nichol; W. Clegg; M. J. Gutmann; D. M. Tooke; Acta Crystallographica Section B 62 (2006) 798–807; doi:10.1107/S0108768106025171

data_2100598
_publ_section_title
;
 Stoichiometry-dependent structures: an X-ray and neutron
 single-crystal diffraction study of the effect of reaction
 stoichiometry on the crystalline products formed in the
 potassium--cyanurate system
;
_journal_coeditor_code           BS5033
_journal_date_accepted           2006-06-29
_journal_date_recd_electronic    2006-03-31
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              798
_journal_page_last               807
_journal_paper_category          FA
_journal_paper_doi               10.1107/S0108768106025171
_journal_volume                  62
_journal_year                    2006
_chemical_formula_moiety         'C12 D17 K3 N12 O16'
_chemical_formula_sum            'C12 D17 K3 N12 O16'
_chemical_formula_weight         719.71
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 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                 97.520(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.8143(15)
_cell_length_b                   16.3214(19)
_cell_length_c                   11.8498(14)
_cell_measurement_reflns_used    7146
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.1
_cell_measurement_theta_min      2.5
_cell_volume                     2457.0(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.914
_diffrn_measurement_device_type  'Bruker SMART 1K CCD diffractometer'
_diffrn_measurement_method       'thin-slice \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0294
_diffrn_reflns_av_sigmaI/netI    0.0265
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            10491
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.47
_diffrn_reflns_theta_min         1.73
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.660
_exptl_absorpt_correction_T_max  0.968
_exptl_absorpt_correction_T_min  0.655
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.946
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1432
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.639
_refine_diff_density_min         -0.453
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     232
_refine_ls_number_reflns         2926
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0443
_refine_ls_R_factor_gt           0.0335
_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^)+(0.0557P)^2^+1.2767P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0880
_refine_ls_wR_factor_ref         0.0949
_reflns_number_gt                2425
_reflns_number_total             2926
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bs5033.cif
_cod_data_source_block           3_Xray
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               2100598