Acta Cryst. (2005). E61, i234-i236  [ doi:10.1107/S1600536805031934 ]

Tetrasamarium(II) oxide hexaiodide, Sm₄OI₆

S. Hammerich, I. Pantenburg and G. Meyer

Online 19 October 2005

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (m-O) = 0.014 Å
• R factor = 0.042
• wR factor = 0.104
• Data-to-parameter ratio = 36.8

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT199_ALERT_1_C Check the Reported _cell_measurement_temperature        293 K     
PLAT200_ALERT_1_C Check the Reported _diffrn_ambient_temperature .        293 K     
PLAT731_ALERT_1_C Bond    Calc  3.4078(19), Rep   3.4078(8) ......       2.38 su-Rat
              SM1  -I1      1.555   5.655                                       

Alert level G
REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is
            correct. If it is not, please give the correct count in the
            _publ_section_exptl_refinement section of the submitted CIF.
           From the CIF: _diffrn_reflns_theta_max           32.20
           From the CIF: _reflns_number_total                957
           Count of symmetry unique reflns          548
           Completeness (_total/calc)            174.64%
           TEST3: Check Friedels for noncentro structure
           Estimate of Friedel pairs measured       409
           Fraction of Friedel pairs measured     0.746
           Are heavy atom types Z>Si present        yes

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   3 ALERT level C = Check and explain
   1 ALERT level G = General alerts; check

   3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   0 ALERT type 2 Indicator that the structure model may be wrong or deficient
   0 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion

Copyright © International Union of Crystallography
IUCr Webmaster