Synthesis and structural characterisation of iron(II) and copper(II) diphosphates containing flattened metal oxotetrahedra
Keates, Adam C.; Wang, Qianlong; Weller, Mark T.; Journal of Solid State Chemistry 210 (2014) 10–14; doi:10.1016/j.jssc.2013.10.024

data_1562471
_publ_section_title
;
 Synthesis and structural characterisation of iron(II) and copper(II)
 diphosphates containing flattened metal oxotetrahedra
;
_journal_issue                   1
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              10
_journal_page_last               14
_journal_paper_doi               10.1016/j.jssc.2013.10.024
_journal_volume                  210
_journal_year                    2014
_chemical_formula_sum            'Cu K2 O7 P2'
_chemical_formula_weight         315.69
_space_group_IT_number           113
_space_group_name_Hall           'P -4 2ab'
_space_group_name_H-M_alt        'P -4 21 m'
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_H-M   'P -4 21 m'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.056(2)
_cell_length_b                   8.056(2)
_cell_length_c                   5.4600(11)
_cell_measurement_reflns_used    2755
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.7
_cell_volume                     354.35(14)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Rigaku Saturn724+ (2x2 bin mode)'
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0894
_diffrn_reflns_av_sigmaI/netI    0.0596
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            3290
_diffrn_reflns_theta_full        27.42
_diffrn_reflns_theta_max         27.42
_diffrn_reflns_theta_min         3.58
_exptl_absorpt_coefficient_mu    4.70
_exptl_absorpt_correction_T_max  0.9285
_exptl_absorpt_correction_T_min  0.8954
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            Blue
_exptl_crystal_density_diffrn    2.959
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Ellispe
_exptl_crystal_F_000             284
_exptl_crystal_size_max          0.02
_exptl_crystal_size_mid          0.01
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.432
_refine_diff_density_min         -0.441
_refine_diff_density_rms         0.115
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.02(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.919
_refine_ls_matrix_type           full
_refine_ls_number_parameters     34
_refine_ls_number_reflns         454
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.919
_refine_ls_R_factor_all          0.0345
_refine_ls_R_factor_gt           0.0267
_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^)+(0.0252P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0603
_refine_ls_wR_factor_ref         0.0629
_reflns_number_gt                387
_reflns_number_total             454
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            JSSC-2014-210-10.cif
_cod_data_source_block           1
_cod_original_cell_volume        354.35(15)
_cod_original_sg_symbol_H-M      P-42(1)m
_cod_original_formula_sum        'K2 Cu P2 O7'
_cod_database_code               1562471