The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
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lattice parameter of silicon
 $a$
 Value  543.102 0504 x 10-12 m
 Standard uncertainty    0.000 0089 x 10-12 m
  Relative standard uncertainty   1.6 x 10-8
 Concise form  543.102 0504(89) x 10-12 m    
 
Click here for correlation coefficient of this constant with other constants
Source: 2010 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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