Twinning by merohedry in cyclohexanone oxime: a revised structure
Lutz, Martin; Spek, Anthony L.; Dabirian, Reza; van Walree, Cornelis A.; Jenneskens, Leonardus W.; Acta Crystallographica Section C 60 (2004) o127–o129; doi:10.1107/S0108270103029196

data_2013768
_publ_section_title
;
 Twinning by merohedry in cyclohexanone oxime: a revised structure
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o127
_journal_page_last               o129
_journal_paper_doi               10.1107/S0108270103029196
_journal_volume                  60
_journal_year                    2004
_chemical_formula_moiety         'C6 H11 N O'
_chemical_formula_sum            'C6 H11 N O'
_chemical_formula_weight         113.16
_chemical_name_systematic
;
cyclohexanone oxime
;
_space_group_IT_number           147
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-P 3'
_symmetry_space_group_name_H-M   'P -3'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            18
_cell_length_a                   20.9830(3)
_cell_length_b                   20.9830(3)
_cell_length_c                   7.62100(10)
_cell_measurement_reflns_used    12992
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      1.94
_cell_volume                     2905.88(7)
_computing_cell_refinement       'HKL2000 (Otwinowski & Minor, 1997)'
_computing_data_reduction        HKL2000
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Nonius CAD-4 CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.03
_diffrn_reflns_av_sigmaI/netI    0.0257
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            12992
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.94
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.164
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1116
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.256
_refine_diff_density_min         -0.156
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     230
_refine_ls_number_reflns         4440
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0412
_refine_ls_R_factor_gt           0.0344
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0469P)^2^+0.3995P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0849
_refine_ls_wR_factor_ref         0.0891
_reflns_number_gt                3993
_reflns_number_total             4440
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fg1726.cif
_cod_data_source_block           II
_cod_database_code               2013768
_cod_database_fobs_code          2013768