Crystal structures and comparisons of potassium rare-earth molybdates K<i>RE</i>(MoO~4~)~2~ (<i>RE</i> = Tb, Dy, Ho, Er, Yb, and Lu)
Chong, Saehwa; Perry, Samuel; Riley, Brian J.; Nelson, Zayne J.; Acta Crystallographica Section E 76 (2020) 1871–1875; doi:10.1107/S205698902001542X

data_2243689
_publ_section_title
;
 Crystal structures and comparisons of potassium rare-earth molybdates
 K<i>RE</i>(MoO~4~)~2~ (<i>RE</i> = Tb, Dy, Ho, Er, Yb, and Lu)
;
_journal_coeditor_code           RU2071
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              1871
_journal_page_last               1875
_journal_paper_doi               10.1107/S205698902001542X
_journal_volume                  76
_journal_year                    2020
_chemical_formula_iupac          'K Er (Mo O4)2'
_chemical_formula_moiety         'K Er Mo2 O8'
_chemical_formula_sum            'Er K Mo2 O8'
_chemical_formula_weight         526.24
_chemical_name_systematic
;
Potassium erbium bis(molybdate)
;
_space_group_IT_number           60
_space_group_name_Hall           '-P 2n 2ab'
_space_group_name_H-M_alt        'P b c n'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_atom_sites_solution_primary     dual
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.0602(2)
_cell_length_b                   18.1965(8)
_cell_length_c                   7.8920(3)
_cell_measurement_reflns_used    7328
_cell_measurement_temperature    100
_cell_measurement_theta_max      33.9890
_cell_measurement_theta_min      3.3830
_cell_volume                     726.68(5)
_computing_cell_refinement
;
CrysAlis Pro (Rigaku OD, 2019)
;
_computing_data_collection
;
CrysAlis Pro (Rigaku OD, 2019)
;
_computing_data_reduction
;
CrysAlis Pro (Rigaku OD, 2019)
;
_computing_molecular_graphics
;
<i>OLEX2</i> (Dolomanov <i>et al.</i>,  2009)
;
_computing_publication_material
;
publCIF (Westrip, 2010)
;
_computing_structure_refinement
;
SHELXL (Sheldrick, 2015b)
;
_computing_structure_solution
;
SHELXT (Sheldrick, 2015a)
;
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 10.0000
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.938
_diffrn_measurement_device_type  'Rigaku XtaLAB Synergy-S, HyPix'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'micro-focus sealed X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0718
_diffrn_reflns_av_unetI/netI     0.0267
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            21246
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         33.953
_diffrn_reflns_theta_min         2.238
_exptl_absorpt_coefficient_mu    15.418
_exptl_absorpt_correction_T_max  0.911
_exptl_absorpt_correction_T_min  0.091
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
(CrysAlisPro; Rigaku OD, 2019)
;
_exptl_crystal_colour            'light pink'
_exptl_crystal_density_diffrn    4.810
_exptl_crystal_description       plate
_exptl_crystal_F_000             940
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.152
_exptl_crystal_size_min          0.021
_refine_diff_density_max         2.04
_refine_diff_density_min         -1.624
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.061
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     56
_refine_ls_number_reflns         1386
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0300
_refine_ls_R_factor_gt           0.0265
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0345P)^2^+4.1539P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0709
_refine_ls_wR_factor_ref         0.0727
_reflns_number_gt                1255
_reflns_number_total             1386
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ru2071sup1.cif
_cod_data_source_block           Er_Molybdate
_cod_original_formula_sum        'K Er Mo2 O8'
_cod_database_code               2243689
_shelx_res_checksum              6451
_cod_database_fobs_code 2243689