Acta Cryst. (2008). E64, i66  [ doi:10.1107/S160053680802789X ]

Mg₄Sb₂O₉ of the ilmenite structure type

Y. Michiue

Online 6 September 2008

Key indicators

• Single-crystal X-ray study
• T = 295 K
• Mean (Mg-O) = 0.002 Å
• Disorder in main residue
• R factor = 0.032
• wR factor = 0.075
• Data-to-parameter ratio = 45.5

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT301_ALERT_3_C Main Residue  Disorder .........................      18.00 Perc.
PLAT076_ALERT_1_C Occupancy       0.33 less than 1.0 for Sp.pos  .        MG1      

Alert level G
ABSTM02_ALERT_3_G  The ratio of expected to reported Tmax/Tmin(RR) is > 1.10
            Tmin and Tmax reported:      0.210     0.671
            Tmin and Tmax expected:      0.166     0.705
            RR =      1.326
            Please check that your absorption correction is appropriate.

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

   1 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
   2 ALERT type 3 Indicator that the structure quality may be low
   0 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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