Photoluminescent chromium molybdate cluster coordinated with rare earth cations: synthesis, structure, optical and magnetic properties
Kumar, Dinesh; Ahmad, Shahab; Prakash, G. Vijaya; Ramanujachary, Kandalam V.; Ramanan, Arunachalam; CrystEngComm 16 (2014) 7097–; doi:10.1039/C4CE00865K

data_7216761
_publ_section_title
;
 Photoluminescent chromium molybdate cluster coordinated with rare earth
 cations: synthesis, structure, optical and magnetic properties
;
_journal_issue                   30
_journal_name_full               CrystEngComm
_journal_page_first              7097
_journal_paper_doi               10.1039/C4CE00865K
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'Cr Mo6 O30 Tb, 2(C6 H5 N O2), 4(O)'
_chemical_formula_sum            'C12 H10 Cr Mo6 N2 O38 Tb'
_chemical_formula_weight         1576.79
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'SHELXTL-NT2000 ver.6.12'
_cell_angle_alpha                90.00
_cell_angle_beta                 104.117(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.389(2)
_cell_length_b                   12.5427(14)
_cell_length_c                   17.963(2)
_cell_measurement_reflns_used    7862
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.30
_cell_measurement_theta_min      2.44
_cell_volume                     4018.0(8)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0211
_diffrn_reflns_av_sigmaI/netI    0.0237
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            10273
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.99
_exptl_absorpt_coefficient_mu    3.922
_exptl_absorpt_correction_T_max  0.234
_exptl_absorpt_correction_T_min  0.138
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2000)'
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    2.607
_exptl_crystal_density_meas      2.508
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2964
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.37
_refine_diff_density_max         1.339
_refine_diff_density_min         -0.757
_refine_diff_density_rms         0.259
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.297
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         3533
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.297
_refine_ls_R_factor_all          0.0329
_refine_ls_R_factor_gt           0.0313
_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^)+(0.0444P)^2^+27.0766P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0878
_refine_ls_wR_factor_ref         0.0972
_reflns_number_gt                3456
_reflns_number_total             3533
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ce00865k2.cif
_cod_data_source_block           4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 7216759--7216762.cif.
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_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7216761