Synthesis, characterization, and properties of reduced europium molybdates and tungstates
Abeysinghe, Dileka; Gerke, Birgit; Morrison, Gregory; Hsieh, Chun H.; Smith, Mark D.; Pöttgen, Rainer; Makris, Thomas M.; zur Loye, Hans-Conrad; Journal of Solid State Chemistry 229 (2015) 173–180; doi:10.1016/j.jssc.2015.05.014

data_1561851
_publ_section_title
;
 Synthesis, characterization, and properties of reduced europium
 molybdates and tungstates
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              173
_journal_page_last               180
_journal_paper_doi               10.1016/j.jssc.2015.05.014
_journal_volume                  229
_journal_year                    2015
_chemical_formula_moiety         'Eu0.91 K0.09 Mo O4'
_chemical_formula_sum            'Eu0.91 K0.09 Mo O4'
_chemical_formula_weight         301.32
_space_group_crystal_system      tetragonal
_space_group_IT_number           88
_space_group_name_Hall           '-I 4ad'
_space_group_name_H-M_alt        'I 41/a :2'
_atom_sites_solution_hydrogens   .
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.3857(2)
_cell_length_b                   5.3857(2)
_cell_length_c                   11.9827(6)
_cell_measurement_reflns_used    1638
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      34.970
_cell_measurement_theta_min      4.148
_cell_volume                     347.57(3)
_computing_cell_refinement       'SAINT-Plus Version 6.45 (Bruker, 2001)'
_computing_data_collection       'SMART Version 5.631 (Bruker, 2001)'
_computing_data_reduction        'SAINT-Plus Version 6.45 (Bruker, 2001)'
_computing_molecular_graphics    various
_computing_publication_material  various
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART APEX CCD diffractometer'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0206
_diffrn_reflns_av_unetI/netI     0.0110
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            4419
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         35.008
_diffrn_reflns_theta_min         4.148
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    19.777
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.4397
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS Version 2.05 (Bruker, 2001)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    5.758
_exptl_crystal_description       'tetragonal bipyramid'
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.080
_exptl_crystal_size_min          0.050
_refine_diff_density_max         1.180
_refine_diff_density_min         -0.687
_refine_diff_density_rms         0.174
_refine_ls_extinction_coef       0.0144(8)
_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   1.152
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     16
_refine_ls_number_reflns         393
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.152
_refine_ls_R_factor_all          0.0189
_refine_ls_R_factor_gt           0.0160
_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^)+(0.0184P)^2^+1.1451P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0418
_refine_ls_wR_factor_ref         0.0434
_reflns_number_gt                346
_reflns_number_total             393
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            JSSC-2015-229-173.cif
_cod_data_source_block           da1092bs
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_database_code               1561851
_shelx_estimated_absorpt_t_min   0.242
_shelx_estimated_absorpt_t_max   0.438
_shelxl_version_number           2013-4
_shelx_res_checksum              49260
_shelx_hkl_checksum              41276