Synthesis and characterisation of four new heterometal alkoxides: potential precursors for the MOCVD of ferroelectric oxides
Jones, Anthony C.; Tobin, Neil L.; Marshall, Paul A.; Potter, Richard J.; Chalker, Paul R.; Bickley, Jamie F.; Davies, Hywel O.; Smith, Lesley M.; Critchlow, Gary W.; Journal of Materials Chemistry 14 (2004) 887–; doi:10.1039/b312697h

data_7204758
_publ_section_title
;
 Synthesis and characterisation of four new heterometal alkoxides:
 potential precursors for the MOCVD of ferroelectric oxides
;
_journal_issue                   5
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              887
_journal_paper_doi               10.1039/b312697h
_journal_volume                  14
_journal_year                    2004
_chemical_formula_sum            'C34 H84 N4 Nb2 O12 Sr'
_chemical_formula_weight         1014.49
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 102.013(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.796(2)
_cell_length_b                   9.7845(11)
_cell_length_c                   25.620(3)
_cell_measurement_temperature    213(2)
_cell_volume                     5099.0(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      213(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Stoe IPDS'
_diffrn_measurement_method       'Image Plate'
_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  0.1261
_diffrn_reflns_av_sigmaI/netI    0.1757
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            22743
_diffrn_reflns_theta_full        22.45
_diffrn_reflns_theta_max         22.45
_diffrn_reflns_theta_min         1.63
_exptl_absorpt_coefficient_mu    1.535
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.322
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2128
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.380
_refine_diff_density_min         -0.424
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.847
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     474
_refine_ls_number_reflns         6552
_refine_ls_number_restraints     322
_refine_ls_restrained_S_all      0.993
_refine_ls_R_factor_all          0.1507
_refine_ls_R_factor_gt           0.0594
_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^)+(0.0366P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1213
_refine_ls_wR_factor_ref         0.1356
_reflns_number_gt                2459
_reflns_number_total             6552
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b312697h.txt
_cod_data_source_block           tony39
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7204758