Acta Cryst. (2009). E65, i43  [ doi:10.1107/S1600536809016638 ]

Pr₅Si₃N₉

S. Lupart and W. Schnick

Online 14 May 2009

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (Si-N) = 0.009 Å
• R factor = 0.037
• wR factor = 0.097
• Data-to-parameter ratio = 16.4

checkCIF/PLATON results

No syntax errors found





Alert level A
PLAT129_ALERT_4_A Unusual Space-group Specified ..................       CMCE     

Alert level C
            Value of measurement temperature given =   293.000
            Value of melting point given =     0.000
PLAT042_ALERT_1_C Calc. and Reported MoietyFormula Strings  Differ          ?

Alert level G
FORMU01_ALERT_1_G  There is a discrepancy between the atom counts in the
            _chemical_formula_sum and _chemical_formula_moiety. This is
            usually due to the moiety formula being in the wrong format.
            Atom count from _chemical_formula_sum:   N9 Pr5 Si3
            Atom count from _chemical_formula_moiety:
PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature        293 K    
PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature .        293 K    

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

   4 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
   0 ALERT type 5 Informative message, check

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