X-ray structural study of intermetallic alloys RT2Si and RTSi2 (R=rare earth, T=noble metal)
Gribanov, Alexander; Grytsiv, Andriy; Rogl, Peter; Seropegin, Yurii; Giester, Gerald; Journal of Solid State Chemistry 183 (2010) 1278–1289; doi:10.1016/j.jssc.2010.03.038

data_1563574
_publ_section_title
;
 X-ray structural study of intermetallic alloys RT2Si and RTSi2 (R=rare
 earth, T=noble metal)
;
_journal_issue                   6
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              1278
_journal_page_last               1289
_journal_paper_doi               10.1016/j.jssc.2010.03.038
_journal_volume                  183
_journal_year                    2010
_chemical_formula_moiety         YbPt2Si
_chemical_formula_sum            'Pt8 Si4 Yb4'
_chemical_formula_weight         2365.24
_chemical_name_common            YbPt2Si
_chemical_name_systematic
; 
 YbPt2Si 
;
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            1
_cell_length_a                   7.1841(2)
_cell_length_b                   6.9151(2)
_cell_length_c                   5.4098(2)
_cell_measurement_temperature    298(2)
_cell_volume                     268.752(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0247
_diffrn_reflns_av_sigmaI/netI    0.0249
_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       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            1182
_diffrn_reflns_theta_full        36.24
_diffrn_reflns_theta_max         36.24
_diffrn_reflns_theta_min         4.72
_exptl_absorpt_coefficient_mu    138.432
_exptl_absorpt_correction_T_max  0.0549
_exptl_absorpt_correction_T_min  0.0549
_exptl_crystal_density_diffrn    14.614
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         5.581
_refine_diff_density_min         -4.361
_refine_diff_density_rms         0.921
_refine_ls_extinction_coef       0.0018(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   1.092
_refine_ls_matrix_type           full
_refine_ls_number_parameters     23
_refine_ls_number_reflns         679
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0289
_refine_ls_R_factor_gt           0.0250
_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^)+(0.0411P)^2^+2.3069P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0645
_refine_ls_wR_factor_ref         0.0667
_reflns_number_gt                628
_reflns_number_total             679
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            JSSC-2010-183-1278.cif
_cod_data_source_block           ybpt2si
_cod_original_sg_symbol_H-M      Pnma
_cod_database_code               1563574