Influence of structural distortions upon photoluminescence properties of Eu3+ and Tb3+ activated Na3Ln(BO3)2 (Ln=Y, Gd) borates
Asiri Naidu, S.; Boudin, S.; Varadaraju, U.V.; Raveau, B.; Journal of Solid State Chemistry 190 (2012) 186–190; doi:10.1016/j.jssc.2012.02.042

data_1563006
_publ_section_title
;
 Influence of structural distortions upon photoluminescence properties of
 Eu3+ and Tb3+ activated Na3Ln(BO3)2 (Ln=Y, Gd) borates
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              186
_journal_page_last               190
_journal_paper_doi               10.1016/j.jssc.2012.02.042
_journal_volume                  190
_journal_year                    2012
_chemical_formula_structural     Na3Gd(BO3)2
_chemical_formula_sum            'B2 Gd Na3 O6'
_chemical_formula_weight         343.84
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 123.3525(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.52297(6)
_cell_length_b                   8.72831(8)
_cell_length_c                   12.1476(1)
_cell_volume                     577.711(9)
_computing_structure_refinement  'Fullprof Suite 1.00 (Feb 2007)'
_diffrn_ambient_temperature      293
_diffrn_measurement_device_type  'X'Pert Pro Panalytical Philips'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.5418
_diffrn_source_type              'X-ray tube'
_exptl_crystal_density_diffrn    3.95
_pd_calc_method                  'Rietveld refinement'
_pd_char_colour                  white
_pd_meas_2theta_range_inc        0.013130
_pd_meas_2theta_range_max        120.00
_pd_meas_2theta_range_min        5.00
_pd_meas_number_of_points        8758
_pd_meas_scan_method             step
_pd_proc_2theta_range_inc        0.013130
_pd_proc_2theta_range_max        120.00
_pd_proc_2theta_range_min        10.00
_pd_proc_ls_prof_R_factor        0.0158
_pd_proc_ls_prof_wR_expected     0.0113
_pd_proc_ls_prof_wR_factor       0.0226
_pd_spec_mount_mode              reflection
_pd_spec_shape                   flat_sheet
_refine_diff_density_max         1.37
_refine_diff_density_min         -1.59
_refine_ls_goodness_of_fit_all   0.0402
_refine_ls_number_constraints    8
_refine_ls_number_parameters     56
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0973
_refine_ls_R_I_factor            0.107
_refine_ls_shift/su_max          0.27
_refine_ls_weighting_scheme      sigma
_reflns_limit_h_max              6
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_reflns_limit_k_max              9
_reflns_limit_k_min              0
_reflns_limit_l_max              13
_reflns_limit_l_min              0
_reflns_number_observed          857
_cod_data_source_file            JSSC-2012-190-186.cif
_cod_data_source_block           Na3Gd(BO3)2
_cod_original_cell_volume        577.712(9)
_cod_original_formula_sum        'B2 Gd1 Na3 O6'
_cod_database_code               1563006
_pd_calib_2theta_offset'         0.0071(4)
_reflns_d_spacing_max            6.617052
_reflns_d_spacing_min            0.890111