Structure-Band Gap Relationships in Hexagonal Polytypes and Low-Dimensional Structures of Hybrid Tin Iodide Perovskites.
Stoumpos, Constantinos C.; Mao, Lingling; Malliakas, Christos D.; Kanatzidis, Mercouri G.; Inorganic chemistry 56 (2017) 56–73; doi:10.1021/acs.inorgchem.6b02764

data_4344949
_publ_section_title
;
 Structure-Band Gap Relationships in Hexagonal Polytypes and
 Low-Dimensional Structures of Hybrid Tin Iodide Perovskites.
;
_journal_issue                   1
_journal_name_full               'Inorganic chemistry'
_journal_page_first              56
_journal_page_last               73
_journal_paper_doi               10.1021/acs.inorgchem.6b02764
_journal_volume                  56
_journal_year                    2017
_chemical_formula_moiety         (C(NH2)3)2SnI4
_chemical_formula_sum            'C2 H12 I4 N6 Sn'
_chemical_formula_weight         746.47
_chemical_name_common            'DiGuanidinium Tin Iodide'
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                67.071(4)
_cell_angle_beta                 85.695(4)
_cell_angle_gamma                88.087(4)
_cell_formula_units_Z            4
_cell_length_a                   9.2424(5)
_cell_length_b                   12.6314(7)
_cell_length_c                   14.3871(8)
_cell_measurement_reflns_used    24605
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.72
_cell_measurement_theta_min      1.54
_cell_volume                     1542.52(15)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'image plate (34 cm diameter)'
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_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_details      ' 360 frames, detector distance = 100 mm'
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '0.5 mm diameter, monocapillary'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0899
_diffrn_reflns_av_sigmaI/netI    0.0545
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8306
_diffrn_reflns_theta_full        29.19
_diffrn_reflns_theta_max         29.19
_diffrn_reflns_theta_min         1.54
_diffrn_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_diffrn_source_current           30
_diffrn_source_power             1.20
_diffrn_source_voltage           40
_exptl_absorpt_coefficient_mu    9.641
_exptl_absorpt_correction_T_max  0.5070
_exptl_absorpt_correction_T_min  0.2408
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   X-SHAPE
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    3.214
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Rectangular Plate'
_exptl_crystal_F_000             1312
_exptl_crystal_size_max          0.077
_exptl_crystal_size_mid          0.072
_exptl_crystal_size_min          0.038
_refine_diff_density_max         3.770
_refine_diff_density_min         -3.037
_refine_diff_density_rms         0.564
_refine_ls_extinction_coef       0.00068(11)
_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   1.097
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     165
_refine_ls_number_reflns         8306
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.097
_refine_ls_R_factor_all          0.1098
_refine_ls_R_factor_gt           0.1000
_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^)+(0.0482P)^2^+303.2563P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2613
_refine_ls_wR_factor_ref         0.2671
_reflns_number_gt                7406
_reflns_number_total             8306
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic6b02764_si_006.cif
_cod_data_source_block           3b.GA2SnI4-100K
_cod_depositor_comments
'Adding full bibliography for 4344944--4344956.cif.'
_cod_original_cell_volume        1542.53(15)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4344949