Elastic properties and acoustic dissipation associated with a disorder‒order ferroelectric transition in a metal‒organic framework
Zhang, Zhiying; Li, Wei; Carpenter, Michael A.; Howard, Christopher J.; Cheetham, Anthony K.; CrystEngComm 17 (2015) 370–; doi:10.1039/C4CE01386G

data_7218068
_publ_section_title
;
 Elastic properties and acoustic dissipation associated with a
 disorder--order ferroelectric transition in a metal--organic framework
;
_journal_issue                   2
_journal_name_full               CrystEngComm
_journal_page_first              370
_journal_paper_doi               10.1039/C4CE01386G
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         '[NH4][Zn(HCOO)3]'
_chemical_formula_sum            'C3 H7 N O6 Zn'
_chemical_formula_weight         218.47
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           182
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 6c 2c'
_symmetry_space_group_name_H-M   'P 63 2 2'
_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            2
_cell_length_a                   7.3090(2)
_cell_length_b                   7.3090(2)
_cell_length_c                   8.1701(3)
_cell_measurement_reflns_used    1310
_cell_measurement_temperature    300(2)
_cell_measurement_theta_max      28.9030
_cell_measurement_theta_min      4.0643
_cell_volume                     377.98(2)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_molecular_graphics    'X-Seed (Barbour et al., 2001)'
_computing_publication_material  'X-Seed (Barbour et al., 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      300(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_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  0.0362
_diffrn_reflns_av_sigmaI/netI    0.0179
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            2059
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         28.97
_diffrn_reflns_theta_min         4.07
_exptl_absorpt_coefficient_mu    3.235
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.37243
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.920
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocky
_exptl_crystal_F_000             220
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.467
_refine_diff_density_rms         0.084
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(3)
_refine_ls_extinction_coef       1.52(7)
_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   1.074
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     20
_refine_ls_number_reflns         323
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.107
_refine_ls_R_factor_all          0.0183
_refine_ls_R_factor_gt           0.0180
_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^)+(0.0350P)^2^+0.0300P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0487
_refine_ls_wR_factor_ref         0.0492
_reflns_number_gt                317
_reflns_number_total             323
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ce01386g2.cif
_cod_data_source_block           c:\docume~1\user_2\desktop\300k\1
_cod_depositor_comments
'Adding full bibliography for 7218067--7218068.cif.'
_cod_original_sg_symbol_H-M      P6(3)22
_cod_database_code               7218068