Microwave sol-gel synthesis and upconversion photoluminescence properties of CaGd2(WO4)4:Er3+/Yb3+ phosphors with incommensurately modulated structure
Lim, Chang Sung; Aleksandrovsky, Aleksandr; Molokeev, Maxim; Oreshonkov, Alexandr; Atuchin, Victor; Journal of Solid State Chemistry 228 (2015) 160–; doi:10.1016/j.jssc.2015.04.032

data_1529275
_publ_contact_author_address
;
Kirensky Institute of Physics of SB RAS 
Akademgorodok 50-38
660036 Krasnoyarsk
Russia 
;
_publ_contact_author_email       msmolokeev@gmail.com
_publ_contact_author_fax         +(3912)43-89-23
_publ_contact_author_name        'Molokeev Maxim'
_publ_contact_author_phone       +7-950-437-17-72
_publ_section_title
;
 Microwave sol-gel synthesis and upconversion photoluminescence properties
 of CaGd2(WO4)4:Er3+/Yb3+ phosphors with incommensurately modulated
 structure
;
_journal_issue                   0
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              160
_journal_paper_doi               10.1016/j.jssc.2015.04.032
_journal_volume                  228
_journal_year                    2015
_chemical_formula_moiety         'Er0.20 Gd1.80 O16 W4, 4(Ca0.25)'
_chemical_formula_sum            'Ca Er0.2 Gd1.8 O16 W4'
_chemical_formula_weight         1347.94
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 134.2794(20)
_cell_angle_gamma                90
_cell_formula_units_Z            1
_cell_length_a                   7.32393(32)
_cell_length_b                   11.41202(50)
_cell_length_c                   5.21863(25)
_cell_measurement_temperature    300
_cell_volume                     312.28(3)
_diffrn_ambient_temperature      300
_diffrn_measurement_device_type
;
D8 ADVANCE Bruker
;
_diffrn_radiation_monochromator  none
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type
;
 Cu K\a~1~~2~
;
_exptl_absorpt_coefficient_mu    133.759
_exptl_crystal_density_diffrn    7.167864
_pd_char_colour
;
colourless
;
_pd_meas_2theta_range_inc        0.02
_pd_meas_2theta_range_max        110
_pd_meas_2theta_range_min        5
_pd_meas_scan_method             step
_pd_proc_ls_pref_orient_corr
;
Anisotropic model of PO. Spherical harmonics 4 ordrer.
 Jarvinen (1993). Application of symmetrized harmonics expansion to correction
of the preferred orientation effect. - J. Appl. Cryst. 26 p525-531.
;
_pd_proc_ls_profile_function     PearsonVII
_pd_proc_ls_prof_R_factor        12.153
_pd_proc_ls_prof_wR_expected     11.753
_pd_proc_ls_prof_wR_factor       17.511
_pd_proc_number_of_points        5250
_pd_spec_mount_mode              reflection
_refine_ls_goodness_of_fit_all   1.490
_refine_ls_R_I_factor            2.84
_refine_ls_shift/su_max          0.01000
_cod_data_source_file            1529275.cif
_cod_data_source_block           1529275
_cod_depositor_comments
'This cif-file doesn't correspond to publication.'
_cod_original_cell_volume        312.279(27)
_cod_original_sg_symbol_Hall
;
-C 2yc
;
_cod_original_sg_symbol_H-M      C2/c
_cod_original_formula_sum
;
Ca Er0.20 Gd1.80 O16 W4
;
_cod_database_code               1529275
_cod_database_fobs_code          1529275