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atomic unit of action  Numerical value  1.054 571 817...  x 10-34 J s  Standard uncertainty  (exact)   Relative standard uncertainty  (exact)  Concise form  1.054 571 817... x 10-34 J s       Click here for correlation coefficient of this constant with other constants Source: 2018 CODATA      recommended values  Definition of uncertainty       Correlation coefficient with any other constant