Flux Synthesis, Crystal Structure, and Luminescence Properties of a New Europium Fluoride-Silicate: K5Eu2FSi4O13
Pei-Yun Chiang; Tsai-Wei Lin; Jian-Hung Dai; Bor-Chen Chang; Kwang-Hwa Lii; Inorganic Chemistry 46 (2007) 3619–3622; doi:10.1021/ic0700304

data_4308061
_publ_section_title
;
Flux Synthesis, Crystal Structure, and Luminescence Properties of a New
Europium Fluoride-Silicate: K5Eu2FSi4O13
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3619
_journal_page_last               3622
_journal_paper_doi               10.1021/ic0700304
_journal_volume                  46
_journal_year                    2007
_chemical_formula_moiety         K5Eu2FSi4O13
_chemical_formula_sum            'Eu2 F K5 O13 Si4'
_chemical_formula_weight         838.78
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           11
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 92.248(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.1850(2)
_cell_length_b                   5.7981(2)
_cell_length_c                   18.1675(6)
_cell_measurement_temperature    293(2)
_cell_volume                     756.26(4)
_computing_molecular_graphics    Diamond
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  CCD
_diffrn_measurement_method       'omega scan'
_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  0.0523
_diffrn_reflns_av_sigmaI/netI    0.0405
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            7998
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         1.12
_exptl_absorpt_coefficient_mu    9.987
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS program'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    3.683
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             780
_refine_diff_density_max         1.950
_refine_diff_density_min         -1.593
_refine_diff_density_rms         0.250
_refine_ls_extinction_coef       0.0024(2)
_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   1.057
_refine_ls_matrix_type           full
_refine_ls_number_parameters     140
_refine_ls_number_reflns         1900
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0318
_refine_ls_R_factor_gt           0.0256
_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^)+(0.0329P)^2^+0.4793P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0593
_refine_ls_wR_factor_ref         0.0662
_reflns_number_gt                1531
_reflns_number_total             1900
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0700304si20070109_030037.cif
_cod_data_source_block           KEuFSiO
_cod_database_code               4308061