Jahn-Teller Effect on Framework Flexibility of Hybrid Organic-Inorganic Perovskites.
Gui, Di; Ji, Lijun; Muhammad, Azeem; Li, Wei; Cai, Weizhao; Li, Yanchun; Li, Xiaodong; Wu, Xiang; Lu, Peixiang; The journal of physical chemistry letters  (2018) 751–755; doi:10.1021/acs.jpclett.7b03229

data_8000271
_publ_section_title
;
 Jahn-Teller Effect on Framework Flexibility of Hybrid Organic-Inorganic
 Perovskites.
;
_journal_name_full               'The journal of physical chemistry letters'
_journal_page_first              751
_journal_page_last               755
_journal_paper_doi               10.1021/acs.jpclett.7b03229
_journal_year                    2018
_chemical_formula_moiety         '0.25(C12 H12 O24 Zn4), C H6 N3'
_chemical_formula_sum            'C4 H9 N3 O6 Zn'
_chemical_formula_weight         260.51
_space_group_crystal_system      orthorhombic
_space_group_IT_number           52
_space_group_name_Hall           '-P 2a 2bc'
_space_group_name_H-M_alt        'P n n a'
_symmetry_space_group_name_Hall  '-P 2a 2bc'
_symmetry_space_group_name_H-M   'P n n a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2017-05-13
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5337)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.3501(3)
_cell_length_b                   11.7353(5)
_cell_length_c                   8.9456(4)
_cell_measurement_reflns_used    12199
_cell_measurement_temperature    270.02(10)
_cell_measurement_theta_max      30.1700
_cell_measurement_theta_min      3.7510
_cell_volume                     876.59(6)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      270.02(10)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.961
_diffrn_measurement_device_type  'XtaLAB Pro: Kappa single'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0205
_diffrn_reflns_av_unetI/netI     0.0071
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            21770
_diffrn_reflns_theta_full        30.21
_diffrn_reflns_theta_max         30.21
_diffrn_reflns_theta_min         3.76
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    2.813
_exptl_crystal_density_diffrn    1.974
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             528
_refine_diff_density_max         0.277
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.124
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     66
_refine_ls_number_reflns         1261
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.124
_refine_ls_R_factor_all          0.0178
_refine_ls_R_factor_gt           0.0169
_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^)+(0.0255P)^2^+0.3217P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0496
_refine_ls_wR_factor_ref         0.0500
_reflns_number_gt                1206
_reflns_number_total             1261
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            Zn-270K.cif
_cod_data_source_block           Zn_270_00-multiscan
_cod_database_code               8000271
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H,H) groups
2. Others
 Fixed Sof: H2A(0.5) H2B(0.5)
3.a Aromatic/amide H refined with riding coordinates:
 C2(H2), C1(H1)
3.b X=CH2 refined with riding coordinates:
 N1(H1A,H1B), N2(H2A,H2B)
;
_olex2_submission_special_instructions 'No special instructions were received'