Synthesis, crystal structures and chemical bonding of RE~5{-~<i>x</i>}Li~<i>x~</i>Ge~4~ (RE = Nd, Sm and Gd; <i>x</i> \σimeq 1) with the orthorhombic Gd~5~Si~4~ type
Suen, Nian-Tzu; You, Tae-Soo; Bobev, Svilen; Acta Crystallographica Section C 69 (2013) 1–4; doi:10.1107/S0108270112050032

data_2018752
_publ_section_title
;
 Synthesis, crystal structures and chemical bonding of
 RE~5{-~<i>x</i>}Li~<i>x~</i>Ge~4~ (RE = Nd, Sm and Gd; <i>x</i> \\simeq
 1) with the orthorhombic Gd~5~Si~4~ type
;
_journal_coeditor_code           FN3120
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1
_journal_page_last               4
_journal_paper_doi               10.1107/S0108270112050032
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'Sm3.97 Li1.03 Ge4'
_chemical_formula_sum            'Ge4 Li1.03 Sm3.97'
_chemical_formula_weight         893.68
_chemical_name_systematic
;
Tetrasamarium lithium tetragermanide
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2846(16)
_cell_length_b                   14.938(3)
_cell_length_c                   7.8594(17)
_cell_measurement_reflns_used    958
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      23.45
_cell_measurement_theta_min      4.05
_cell_volume                     855.2(3)
_computing_cell_refinement       'SMART (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        'SAINT (Bruker, 2002)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008<i>b</i>)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008<i>b</i>)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008<i>b</i>)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008<i>b</i>)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \w'
_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  0.0851
_diffrn_reflns_av_sigmaI/netI    0.0416
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            11551
_diffrn_reflns_theta_full        29.13
_diffrn_reflns_theta_max         29.13
_diffrn_reflns_theta_min         2.73
_exptl_absorpt_coefficient_mu    40.511
_exptl_absorpt_correction_T_max  0.4076
_exptl_absorpt_correction_T_min  0.3156
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2008<i>a</i>)'
_exptl_crystal_colour            grey
_exptl_crystal_density_diffrn    6.940
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             1508
_exptl_crystal_size_max          0.04
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.929
_refine_diff_density_min         -2.070
_refine_ls_extinction_coef       0.00082(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008b)'
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_matrix_type           full
_refine_ls_number_parameters     48
_refine_ls_number_reflns         1188
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0405
_refine_ls_R_factor_gt           0.0276
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0150P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0470
_refine_ls_wR_factor_ref         0.0508
_reflns_number_gt                968
_reflns_number_total             1188
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fn3120.cif
_cod_data_source_block           I
_cod_original_cell_volume        855.3(3)
_cod_original_sg_symbol_Hall     '-p 2ac 2n'
_cod_database_code               2018752
_cod_database_fobs_code          2018752