Phase Stability in the Systems AeAl2-xMgx (Ae = Ca, Sr, Ba): Electron Concentration and Size Controlled Variations on the Laves Phase Structural Theme
Shahrad Amerioun; Tadahiro Yokosawa; Sven Lidin; Ulrich Häussermann; Inorganic Chemistry 43 (2004) 4751–4760; doi:10.1021/ic0400235

data_4311324
_publ_section_title
;
 Phase Stability in the Systems AeAl2-xMgx (Ae = Ca, Sr, Ba): Electron
 Concentration and Size Controlled Variations on the Laves Phase
 Structural Theme
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4751
_journal_page_last               4760
_journal_paper_doi               10.1021/ic0400235
_journal_volume                  43
_journal_year                    2004
_chemical_formula_sum            'Al3 Mg Sr2'
_chemical_formula_weight         280.49
_space_group_IT_number           194
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-P 6c 2c'
_symmetry_space_group_name_H-M   'P 63/m m c'
_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                120.00
_cell_formula_units_Z            2
_cell_length_a                   6.3699(8)
_cell_length_b                   6.3699(8)
_cell_length_c                   10.140(2)
_cell_measurement_reflns_used    30
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      42.53
_cell_measurement_theta_min      8.01
_cell_volume                     356.31(9)
_computing_cell_refinement       'PIRUM (Werner & Ericsson, 1993)'
_computing_data_collection       'EXPOSE in IPDS (Stoe &Cie, 1997)'
_computing_data_reduction        'X-RED  (Stoe & Cie, 1997)'
_computing_molecular_graphics    'Atoms (Dowty, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 'area detector'
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Stoe IPDS (version 2.87)'
_diffrn_measurement_method       'fi scan'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0718
_diffrn_reflns_av_sigmaI/netI    0.0266
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            2008
_diffrn_reflns_theta_full        25.89
_diffrn_reflns_theta_max         25.89
_diffrn_reflns_theta_min         3.69
_diffrn_standards_interval_count 6.0
_exptl_absorpt_coefficient_mu    15.32
_exptl_absorpt_correction_T_max  0.1783
_exptl_absorpt_correction_T_min  0.1169
_exptl_absorpt_correction_type   'numerical (X-shape, (Stoe & Cie, 1997))'
_exptl_crystal_colour            silver
_exptl_crystal_density_diffrn    2.58
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'needle-like shape'
_exptl_crystal_F_000             250
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.755
_refine_diff_density_min         -0.829
_refine_diff_density_rms         0.213
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.446
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     10
_refine_ls_number_reflns         159
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.446
_refine_ls_R_factor_all          0.0337
_refine_ls_R_factor_gt           0.0307
_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^)+(0.0793P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1302
_refine_ls_wR_factor_ref         0.1328
_reflns_number_gt                139
_reflns_number_total             159
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0400235_7.cif
_cod_data_source_block           SrAl0.60Mg1.40
_cod_depositor_comments
;

2022-02-22
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel

The following automatic conversions were performed:

data name '_atom_site_symetry_multiplicity' was replaced with
'_atom_site_symmetry_multiplicity' as specified in the replacement
file 'data/replacement-values/replacement_tags.lst'.

Automatic conversion script
Id: cif_correct_tags 9268 2022-04-12 08:56:07Z antanas 
;
_cod_original_cell_volume        356.33(10)
_cod_original_formula_sum        SrAl0.60Mg1.40
_cod_original_formula_units_Z    4
_cod_original_formula_weight     137.84
_cod_database_code               4311324