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The relative difference of the thermal conductivities of gaseous ortho- and normal-deuterium has been measured at three different temperatures 18,5°K, 19,8°K and 21,1°K. The results are 0,97 ·10 -3 , 1,08 ·10 -3  and 1,45 ·10 -3  respectively, with an accuracy of ±10%. They are compared with the relative difference of the viscosities for the two deuterium modifications. This comparison leads to a difference in ƒ tr  and ƒ int  for ortho- and normal-deuterium in the EUCKEN relation.

Die Temperaturabhängigkeit der Wärmeleitfähigkeiten von gasförmigem Normal- und Ortho-Deuterium bei Temperaturen des flüssigen Wasserstoffes