#------------------------------------------------------------------------------
#$Date: 2009-11-18 16:56:34 +0200 (Wed, 18 Nov 2009) $
#$Revision: 858 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/2002953.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2002953
_journal_name_full               'Acta Crystallographica, Section B'
_journal_volume                  55
_journal_year     1999
_journal_page_first     341
_journal_page_last     347
_publ_section_title
; Disparate atomic displacements in skutterudite-type LaFe~3~CoSb~12~, a
model for thermoelectric behavior
;
loop_
    _publ_author_name
    'Chakoumakos, Bryan C.'
    'Sales, Brian C.'
    'Mandrus, David'
    'Keppens, Veerle'
_chemical_formula_sum            'Co1.26 Fe2.74 La0.743 Sb12'
_[local]_cod_chemical_formula_sum_orig 'Co1.26 Fe2.74 La.743 Sb12'
_chemical_formula_iupac     'La.743 Fe2.74 Co1.26 Sb12'
_chemical_formula_weight     1791.486
_symmetry_cell_setting     cubic
_symmetry_space_group_name_H-M     'I m -3'
_symmetry_space_group_name_Hall     '-I 2 2 3'
loop_
    _symmetry_equiv_pos_as_xyz
    x,y,z
    1/2+x,1/2+y,1/2+z
    -x,-y,z
    1/2-x,1/2-y,1/2+z
    x,-y,-z
    1/2+x,1/2-y,1/2-z
    -x,y,-z
    1/2-x,1/2+y,1/2-z
    -z,-x,-y
    1/2-z,1/2-x,1/2-y
    -z,x,y
    1/2-z,1/2+x,1/2+y
    z,-x,y
    1/2+z,1/2-x,1/2+y
    z,x,-y
    1/2+z,1/2+x,1/2-y
    y,z,x
    1/2+y,1/2+z,1/2+x
    -y,z,-x
    1/2-y,1/2+z,1/2-x
    -y,-z,x
    1/2-y,1/2-z,1/2+x
    y,-z,-x
    1/2+y,1/2-z,1/2-x
    -x,-y,-z
    1/2-x,1/2-y,1/2-z
    x,y,-z
    1/2+x,1/2+y,1/2-z
    -x,y,z
    1/2-x,1/2+y,1/2+z
    x,-y,z
    1/2+x,1/2-y,1/2+z
    z,x,y
    1/2+z,1/2+x,1/2+y
    z,-x,-y
    1/2+z,1/2-x,1/2-y
    -z,x,-y
    1/2-z,1/2+x,1/2-y
    -z,-x,y
    1/2-z,1/2-x,1/2+y
    -y,-z,-x
    1/2-y,1/2-z,1/2-x
    y,-z,x
    1/2+y,1/2-z,1/2+x
    y,z,-x
    1/2+y,1/2+z,1/2-x
    -y,z,x
    1/2-y,1/2+z,1/2+x
_cell_length_a     9.0971(6)
_cell_length_b     9.0971(6)
_cell_length_c     9.0971(6)
_cell_angle_alpha     90.0
_cell_angle_beta     90.0
_cell_angle_gamma     90.0
_cell_volume     752.85
_cell_formula_units_Z     2
_cell_measurement_reflns_used     31
_cell_measurement_theta_min     18.22
_cell_measurement_theta_max     42.63
_cell_measurement_temperature     295
_exptl_crystal_description     'sawn parallelepiped'
_exptl_crystal_colour     'silver'
_exptl_crystal_size_max     3.5
_exptl_crystal_size_mid     2.5
_exptl_crystal_size_min     2.5
_exptl_crystal_density_diffrn     7.901
_exptl_crystal_density_meas     'not measured'
_exptl_crystal_F_000     20.63
_exptl_absorpt_coefficient_mu     0.0165
_exptl_absorpt_correction_type     none
_diffrn_ambient_temperature     295
_diffrn_radiation_type     neutron
_diffrn_radiation_wavelength     0.8387
_diffrn_measurement_device_type
; Huber 4-circle, Crystal Logic Controller, Helium-3 detector, DEC Alpha
computer
;
_diffrn_measurement_method     Radial-scans
_diffrn_reflns_number     1405
_diffrn_reflns_av_R_equivalents     0.046
_diffrn_reflns_av_sigmaI/netI     0.08
_diffrn_reflns_theta_max     50
_diffrn_reflns_limit_h_min     0
_diffrn_reflns_limit_h_max     16
_diffrn_reflns_limit_k_min     0
_diffrn_reflns_limit_k_max     16
_diffrn_reflns_limit_l_min     0
_diffrn_reflns_limit_l_max     16
_diffrn_standards_number     3
_diffrn_standards_interval_count     200
_diffrn_standards_decay_%     0
_reflns_number_total     463
_reflns_number_gt     321
_reflns_threshold_expression     0.0
_refine_ls_structure_factor_coef     F
_refine_ls_matrix_type     full
_refine_ls_R_factor_obs     0.045
_refine_ls_wR_factor_obs     0.035
_refine_ls_goodness_of_fit_all     1.31
_refine_ls_goodness_of_fit_obs     1.735
_refine_ls_number_reflns     321
_refine_ls_number_parameters     13
_refine_ls_number_restraints     0
_refine_ls_weighting_scheme     'w=(2F~o~/\sF~o~^2^)^2^'
_refine_ls_shift/esd_max     0.0
_refine_ls_shift/esd_mean     0.0
_refine_diff_density_max     1.05
_refine_diff_density_min     -0.48
_refine_ls_extinction_method     'B-C type I Gaussian isotropic'
_refine_ls_extinction_coef     2.32E-04
loop_
    _atom_type_symbol
    FE
    LA
    CO
    SB
##_atom_type_scat_source
##; Sears, V.F. (1992). Neutron News 3, 26-37.
##;
##;UCLA Crystallographic Computing Package (Strouse 1994)
##;
##;UCLA Crystallographic Computing Package - Program Least (Strouse 1994)
##;
##;UCLA Crystallographic Computing Package - Program Reduce,
##Lehmann-Larson algorithm (Strouse 1994)
##;
loop_
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    _atom_site_thermal_displace_type
    _atom_site_occupancy
    La .0 .0 .0 .0196(9) Uani .743(17)
    Fe .25 .25 .25 .00530(10)
                            Uani .685(8)
    Co .25 .25 .25 .00530(10)
                            Uani .315(8)
    Sb .0 .33678(9) .16021(8) .0074(3) Uani 1.0
loop_
    _atom_site_aniso_label
    _atom_site_aniso_U_11
    _atom_site_aniso_U_22
    _atom_site_aniso_U_33
    _atom_site_aniso_U_12
    _atom_site_aniso_U_13
    _atom_site_aniso_U_23
    La .0197(9) .0197(9) .0197(9) .0 .0 .0
    Fe .00535(18) .00535(18) .00535(18) .00047(16) .00047(16) .00047(16)
    Co .00535(18) .00535(18) .00535(18) .00047(16) .00047(16) .00047(16)
    Sb .0052(3)   .0100(3)   .0070(3)   .0 .0 .0013(3)