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Correlation coefficient between two constants inverse meter-hartree relationship†  Numerical value  4.556 335 252 9120 x 10-8 Eh  Standard uncertainty  0.000 000 000 0088 x 10-8 Eh   Relative standard uncertainty  1.9 x 10-12  Concise form  4.556 335 252 9120(88) x 10-8 Eh     †The full description of unit m-1 is cycles or periods per meter.   Source: 2018 CODATA      recommended values  Definition of uncertainty        Correlation coefficient with any other constant

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