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_1561852
_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         'Eu0.90 K0.10 O4 W'
_chemical_formula_sum            'Eu0.9 K0.1 O4 W'
_chemical_formula_weight         388.89
_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-2014
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.4101(2)
_cell_length_b                   5.4101(2)
_cell_length_c                   11.9246(7)
_cell_measurement_reflns_used    1281
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      34.748
_cell_measurement_theta_min      4.136
_cell_volume                     349.02(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-2014 (Sheldrick, 2014)'
_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  0.0200
_diffrn_reflns_av_unetI/netI     0.0118
_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       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            3827
_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         35.062
_diffrn_reflns_theta_min         4.136
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    48.984
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.3171
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS Version 2.05 (Bruker, 2001)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    7.401
_exptl_crystal_description       fragment
_exptl_crystal_F_000             659
_exptl_crystal_size_max          0.060
_exptl_crystal_size_mid          0.050
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.738
_refine_diff_density_min         -0.880
_refine_diff_density_rms         0.213
_refine_ls_extinction_coef       0.00284(19)
_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   1.072
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     16
_refine_ls_number_reflns         391
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0254
_refine_ls_R_factor_gt           0.0163
_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^)+(0.0153P)^2^+0.8459P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0347
_refine_ls_wR_factor_ref         0.0378
_reflns_number_gt                302
_reflns_number_total             391
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            JSSC-2015-229-173.cif
_cod_data_source_block           da1133as
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_original_formula_sum        'Eu0.90 K0.10 O4 W'
_cod_database_code               1561852
_shelx_estimated_absorpt_t_min   0.157
_shelx_estimated_absorpt_t_max   0.245
_shelxl_version_number           2014-1
_shelx_res_checksum              7088
_shelx_hkl_checksum              87035