Lanthanide based coordination polymers chill, relax under magnetic field and also fluoresce.
Goswami, Soumyabrata; Adhikary, Amit; Jena, Himanshu Sekhar; Konar, Sanjit; Dalton transactions (Cambridge, England : 2003) 42 (2013) 9813–9817; doi:10.1039/c3dt51195b

data_7021579
_publ_section_title
;
 Lanthanide based coordination polymers chill, relax under magnetic field
 and also fluoresce.
;
_journal_issue                   27
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9813
_journal_page_last               9817
_journal_paper_doi               10.1039/c3dt51195b
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C10 H4 Gd Na O17 '
_chemical_formula_sum            'C10 H4 Gd Na O17'
_chemical_formula_weight         576.37
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           11
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 113.160(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.7742(10)
_cell_length_b                   15.937(3)
_cell_length_c                   8.1168(14)
_cell_measurement_reflns_used    3215
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.58
_cell_measurement_theta_min      2.73
_cell_volume                     805.7(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  APEX-II
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0341
_diffrn_reflns_av_unetI/netI     0.0193
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            7374
_diffrn_reflns_theta_full        27.45
_diffrn_reflns_theta_max         27.45
_diffrn_reflns_theta_min         2.56
_exptl_absorpt_coefficient_mu    4.241
_exptl_absorpt_correction_T_max  0.318
_exptl_absorpt_correction_T_min  0.162
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   multi-scan
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    2.359
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             550
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.597
_refine_diff_density_min         -0.670
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.099
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     142
_refine_ls_number_reflns         1916
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.099
_refine_ls_R_factor_all          0.0171
_refine_ls_R_factor_gt           0.0166
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0200P)^2^+0.8000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0416
_refine_ls_wR_factor_ref         0.0419
_reflns_number_gt                1902
_reflns_number_total             1916
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt51195b.txt
_cod_data_source_block           Complex1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21/m'
_cod_database_code               7021579