TEMPERATURES AT TRANSITION POINTS IN SOLID OXYGEN

The temperatures at the transition points in solid oxygen have been measured with platinum thermometers in a calorimetric apparatus suitable for thermometer calibrations at low temperatures. As best values" for the transition temperatures on the International Practical Temperature Scale of 1968 are found (by taking into account our results and results of Hoge and of Orlova): 23.866 K and 43.805 K. For the transition near 24 K there was no evidence of a latent heat. © 1969."