Phase Transformation Driven by Valence Electron Concentration: Tuning Interslab Bond Distances in Gd5GaxGe4-x
Yurij Mozharivskyj; Wonyoung Choe; Alexandra O. Pecharsky; Gordon J. Miller; Journal of the American Chemical Society 125 (2003) 15183–15190; doi:10.1021/ja037649z

data_4114470
_publ_section_title
;
 Phase Transformation Driven by Valence Electron Concentration: Tuning
 Interslab Bond Distances in Gd5GaxGe4-x
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15183
_journal_page_last               15190
_journal_paper_doi               10.1021/ja037649z
_journal_volume                  125
_journal_year                    2003
_chemical_formula_sum            'Ga2 Gd5 Ge2'
_chemical_formula_weight         1070.87
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_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            4
_cell_length_a                   7.5162(7)
_cell_length_b                   14.9707(14)
_cell_length_c                   7.9149(7)
_cell_measurement_reflns_used    'all observed'
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.23
_cell_measurement_theta_min      2.72
_cell_volume                     890.61(14)
_computing_cell_refinement       SAINT
_computing_data_collection       SAINT
_computing_data_reduction        SAINT
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.946
_diffrn_measured_fraction_theta_max 0.946
_diffrn_measurement_device_type  'SMART APEX'
_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  0.0331
_diffrn_reflns_av_sigmaI/netI    0.0283
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            5151
_diffrn_reflns_theta_full        28.23
_diffrn_reflns_theta_max         28.23
_diffrn_reflns_theta_min         2.72
_exptl_absorpt_coefficient_mu    49.162
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            metallic
_exptl_crystal_density_diffrn    7.987
_exptl_crystal_F_000             1784
_exptl_crystal_size_max          0.050
_exptl_crystal_size_mid          0.045
_exptl_crystal_size_min          0.030
_refine_diff_density_max         1.989
_refine_diff_density_min         -1.316
_refine_diff_density_rms         0.338
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     46
_refine_ls_number_reflns         1080
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0270
_refine_ls_R_factor_gt           0.0232
_refine_ls_shift/su_max          1.879
_refine_ls_shift/su_mean         0.224
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0256P)^2^+8.4347P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0533
_refine_ls_wR_factor_ref         0.0544
_reflns_number_gt                984
_reflns_number_total             1080
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja037649zsi20030801_040809.cif
_cod_data_source_block           pnma
_cod_database_code               4114470