#------------------------------------------------------------------------------
#$Date: 2016-03-26 18:21:41 +0100 (Sat 26 de Mar de 2016) $
#$Revision: 180431 $
#$URL: svn://www.crystallography.net/cod/cif/7/21/00/7210068.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_7210068
loop_
_publ_author_name
'Szafrański, Marek'
'Jarek, Marcin'
_publ_section_title
;
 Origin of spontaneous polarization and reconstructive phase transition in
 guanidinium iodide
;
_journal_issue                   23
_journal_name_full               CrystEngComm
_journal_page_first              4617
_journal_paper_doi               10.1039/c3ce26979e
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C H6 I N3'
_chemical_formula_weight         186.99
_chemical_melting_point          460(5)
_chemical_name_common            'guanidinium iodide'
_chemical_name_systematic
;
?
;
_space_group_IT_number           186
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 6c -2c'
_symmetry_space_group_name_H-M   'P 63 m c'
_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            4
_cell_length_a                   7.16410(17)
_cell_length_b                   7.16410(17)
_cell_length_c                   12.0317(3)
_cell_measurement_temperature    150.0(1)
_cell_volume                     534.79(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150.0(1)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Gemini A Ultra'
_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  0.0255
_diffrn_reflns_av_sigmaI/netI    0.0115
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7466
_diffrn_reflns_theta_full        32.35
_diffrn_reflns_theta_max         32.35
_diffrn_reflns_theta_min         3.28
_exptl_absorpt_coefficient_mu    5.837
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.76361
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysalisPro (Oxford Diffraction 2010)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.322
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             344
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.883
_refine_diff_density_min         -0.480
_refine_diff_density_rms         0.073
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.205
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     28
_refine_ls_number_reflns         752
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.204
_refine_ls_R_factor_all          0.0212
_refine_ls_R_factor_gt           0.0198
_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/[σ²(Fo²)+(0.0271P)²+0.5434P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0516
_refine_ls_wR_factor_ref         0.0523
_reflns_number_gt                719
_reflns_number_total             752
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce26979e.txt
_cod_data_source_block           ttgi_150d
_cod_original_sg_symbol_H-M      P6(3)mc
_cod_database_code               7210068
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-y, x-y, z'
'-x+y, -x, z'
'-x, -y, z+1/2'
'y, -x+y, z+1/2'
'x-y, x, z+1/2'
'-y, -x, z'
'-x+y, y, z'
'x, x-y, z'
'y, x, z+1/2'
'x-y, -y, z+1/2'
'-x, -x+y, z+1/2'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
I1 I 0.6667 0.3333 0.1614 0.01984(10) Uani 1 6 d S
I2A I 0.0000 0.0000 0.3421(6) 0.0346(12) Uani 0.50 6 d SP
I2B I 0.0000 0.0000 0.3183(6) 0.0286(8) Uani 0.50 6 d SP
C1 C 0.3333 0.6667 -0.9151(6) 0.0201(12) Uani 1 6 d S
N2 N 0.1208(6) 0.5604(3) -0.6408(3) 0.0226(6) Uani 1 2 d S
H2A H 0.0515 0.6297 -0.6401 0.027 Uiso 0.50 1 calc PR
H2B H 0.0515 0.4218 -0.6412 0.027 Uiso 0.50 1 calc PR
N1 N 0.2268(3) 0.7732(3) -0.9154(3) 0.0276(7) Uani 1 2 d S
H1A H 0.2961 0.9118 -0.9159 0.033 Uiso 0.50 1 calc PR
H1B H 0.0882 0.7039 -0.9152 0.033 Uiso 0.50 1 calc PR
C2 C 0.3333 0.6667 -0.6413(6) 0.0175(12) Uani 1 6 d S
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
I1 0.01718(11) 0.01718(11) 0.02516(15) 0.000 0.000 0.00859(6)
I2A 0.0159(7) 0.0159(7) 0.072(4) 0.000 0.000 0.0079(4)
I2B 0.0147(7) 0.0147(7) 0.056(2) 0.000 0.000 0.0074(3)
C1 0.0209(19) 0.0209(19) 0.018(3) 0.000 0.000 0.0104(9)
N2 0.0151(14) 0.0176(11) 0.0342(17) -0.0010(6) -0.0020(13) 0.0076(7)
N1 0.0205(11) 0.0205(11) 0.0440(19) 0.0024(8) -0.0024(8) 0.0120(13)
C2 0.0171(18) 0.0171(18) 0.018(3) 0.000 0.000 0.0085(9)
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
I I -0.4742 1.8119 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
N1 C1 N1 119.999(6) . 3_565
N1 C1 N1 119.999(7) . 2_665
N1 C1 N1 119.999(6) 3_565 2_665
N2 C2 N2 119.997(7) 3_565 .
N2 C2 N2 119.997(7) 3_565 2_665
N2 C2 N2 119.997(8) . 2_665
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
C1 N1 1.322(4) .
C1 N1 1.322(4) 3_565
C1 N1 1.322(4) 2_665
N2 C2 1.319(4) .
C2 N2 1.319(4) 3_565
C2 N2 1.319(4) 2_665
