Acta Cryst. (2008). E64, i13-i14  [ doi:10.1107/S1600536808001608 ]

The dehydrated copper silicate Na₂[Cu₂Si₄O₁₁]: a three-dimensional microporous framework with a linear Si-O-Si linkage

L. Cunha-Silva, P. Brandão, J. Rocha and F. A. Almeida Paz

Online 23 January 2008

Key indicators

• Single-crystal X-ray study
• T = 298 K
• Mean (Si-O) = 0.004 Å
• R factor = 0.043
• wR factor = 0.120
• Data-to-parameter ratio = 11.9

checkCIF/PLATON results

No syntax errors found




Alert level B
PLAT396_ALERT_2_B Deviating Si-O-Si Angle from 150 Deg for      O1     180.00 Deg. 

Alert level C
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ ....          ?
PLAT154_ALERT_1_C The su's on the Cell Angles are Equal  (x 10000)        700 Deg. 

PLAT213_ALERT_2_C Atom O3      has ADP max/min Ratio .............       3.10 oblat
PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor ....       2.91      

Alert level G
PLAT793_ALERT_2_G Check the Absolute Configuration of Si1    .....          R      
PLAT793_ALERT_2_G Check the Absolute Configuration of Si2    .....          R      

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

   2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   5 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
   0 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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