Narrow-band blue emitting nitridomagnesosilicate phosphor Sr<sub>8</sub>Mg<sub>7</sub>Si<sub>9</sub>N<sub>22</sub>:Eu<sup>2+</sup> for phosphor-converted LEDs.
Li, Chao; Zheng, Hong-Wei; Wei, Heng-Wei; Su, Jie; Liao, Fu-Hui; Zhang, Zhen-Yi; Xu, Ling; Yang, Zu-Pei; Wang, Xiao-Ming; Jiao, Huan; Chemical communications (Cambridge, England) 54 (2018) 11598–11601; doi:10.1039/c8cc07218c

data_7122358
_publ_section_title
;
 Narrow-band blue emitting nitridomagnesosilicate phosphor
 Sr<sub>8</sub>Mg<sub>7</sub>Si<sub>9</sub>N<sub>22</sub>:Eu<sup>2+</sup>
 for phosphor-converted LEDs.
;
_journal_issue                   82
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              11598
_journal_page_last               11601
_journal_paper_doi               10.1039/c8cc07218c
_journal_volume                  54
_journal_year                    2018
_chemical_formula_sum            'Mg7 N22 Si9 Sr8'
_chemical_formula_weight         1432.16
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           12
_space_group_name_Hall           '-C 2y'
_space_group_name_H-M_alt        'C 1 2/m 1'
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-05-17 deposited with the CCDC.
2018-09-20 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 110.462(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   15.2798(14)
_cell_length_b                   7.4691(7)
_cell_length_c                   10.9358(10)
_cell_measurement_reflns_used    1110
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      73.7030
_cell_measurement_theta_min      8.8450
_cell_volume                     1169.32(19)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0407
_diffrn_reflns_av_unetI/netI     0.0266
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            13538
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.024
_diffrn_reflns_theta_max         25.024
_diffrn_reflns_theta_min         2.845
_exptl_absorpt_coefficient_mu    18.810
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6119
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   multi-scan
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    4.068
_exptl_crystal_description       block
_exptl_crystal_F_000             1336
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.689
_refine_diff_density_min         -1.503
_refine_diff_density_rms         0.305
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     125
_refine_ls_number_reflns         1110
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0745
_refine_ls_R_factor_gt           0.0711
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0500P)^2^+45.2584P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1673
_refine_ls_wR_factor_ref         0.1689
_reflns_Friedel_coverage         0.000
_reflns_number_gt                995
_reflns_number_total             1110
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8cc07218c2.cif
_cod_data_source_block           3
_cod_depositor_comments          'Adding full bibliography for 7122358.cif.'
_cod_database_code               7122358
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              60888