(thing) by PaSTE Sat Jun 17 2000 at 20:46:37

A measurement of energy equal to 4.359 743 81 x 10-18 J. I have no particular clue as to when one would use a Hartree Energy , but it exists. The symbol is Eh, and the formula to derive the unit is Eh = e2/4(pi)(sigma)0a0 = 2R(infinity)hc = (alpha)2mec2.

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