Crystal structures and optical properties of new quaternary strontium europium aluminate luminescent nanoribbons
Xufan Li; John D. Budai; Feng Liu; Yu-Sheng Chen; Jane Y. Howe; Chengjun Sun; Jonathan Z. Tischler; Richard S. Meltzer; Zhengwei Pan; Journal of Materials Chemistry C 3 (2015) 778–788; doi:10.1039/C4TC02002B

data_7234008
_publ_section_title
;
 Crystal structures and optical properties of new quaternary strontium
 europium aluminate luminescent nanoribbons
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              778
_journal_page_last               788
_journal_paper_doi               10.1039/C4TC02002B
_journal_volume                  3
_journal_year                    2015
_chemical_formula_sum            'Al2 O4 Sr'
_chemical_formula_weight         205.58
_space_group_crystal_system      trigonal
_space_group_IT_number           163
_space_group_name_Hall           '-P 3 2c'
_space_group_name_H-M_alt        'P -3 1 c'
_atom_sites_solution_hydrogens   .
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            4
_cell_length_a                   6.1456(6)
_cell_length_b                   6.1456(6)
_cell_length_c                   10.5585(11)
_cell_measurement_reflns_used    7628
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      21.375
_cell_measurement_theta_min      2.3835
_cell_volume                     345.35(6)
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.894
_diffrn_measured_fraction_theta_max 0.839
_diffrn_radiation_wavelength     0.4428
_diffrn_reflns_av_R_equivalents  0.0919
_diffrn_reflns_av_unetI/netI     0.0389
_diffrn_reflns_Laue_measured_fraction_full 0.894
_diffrn_reflns_Laue_measured_fraction_max 0.839
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            11432
_diffrn_reflns_point_group_measured_fraction_full 0.894
_diffrn_reflns_point_group_measured_fraction_max 0.839
_diffrn_reflns_theta_full        15.407
_diffrn_reflns_theta_max         24.113
_diffrn_reflns_theta_min         2.670
_exptl_absorpt_coefficient_mu    4.568
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8732
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    3.954
_exptl_crystal_description       neddle
_exptl_crystal_F_000             384
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.006
_refine_diff_density_max         2.733
_refine_diff_density_min         -3.376
_refine_diff_density_rms         0.389
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.112
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     23
_refine_ls_number_reflns         646
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.125
_refine_ls_R_factor_all          0.0708
_refine_ls_R_factor_gt           0.0590
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1148P)^2^+2.4124P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1724
_refine_ls_wR_factor_ref         0.1808
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                540
_reflns_number_total             646
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            J-Mater-Chem-C-2015-3-778.cif
_cod_data_source_block           yellow-SEAO
_cod_original_cell_volume        345.35(8)
_cod_database_code               7234008
_shelx_estimated_absorpt_t_min   0.916
_shelx_estimated_absorpt_t_max   0.916