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Acta Cryst. (2013). E69, i53  [ doi:10.1107/S1600536813020151 ]

Na7Al3(As2O7)4

N. Fakhar Bourguiba and A. Driss


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Alert level C PLAT202_ALERT_3_C Isotropic non-H Atoms in Anion/Solvent ......... 1 PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 3.142 PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 1 PLAT934_ALERT_3_C Number of (Iobs-Icalc)/SigmaW > 10 Outliers .... 1 PLAT976_ALERT_2_C Negative Residual Density at 0.89A from O11 . -0.60 eA-3
Alert level G PLAT004_ALERT_5_G Info: Polymeric Structure Found with Dimension . 2 PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? Do ! PLAT042_ALERT_1_G Calc. and Reported MoietyFormula Strings Differ ? Check PLAT083_ALERT_2_G SHELXL Second Parameter in WGHT Unusually Large. 24.91 PLAT302_ALERT_4_G Note: Anion/Solvent Disorder ................... 73 % PLAT811_ALERT_5_G No ADDSYM Analysis: Too Many Excluded Atoms .... ! Info PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L= 0.600 4 PLAT961_ALERT_5_G Dataset Contains no Negative Intensities ....... ! Check
0 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 5 ALERT level C = Check. Ensure it is not caused by an omission or oversight 8 ALERT level G = General information/check it is not something unexpected 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 2 ALERT type 2 Indicator that the structure model may be wrong or deficient 4 ALERT type 3 Indicator that the structure quality may be low 2 ALERT type 4 Improvement, methodology, query or suggestion 4 ALERT type 5 Informative message, check

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