Additional x-ray diffraction data have been taken on ethyl ether in the region of the critical point. (Spangler, Abstract 24, Phys. Rev. 42, p 907, 1932) Series of diffraction curves at pressures of 39.2, 44.1, 49, and 55 kg/cm with temperatures ranging up to 235°C show, as in previous work, that the cybotactic groupings depend more on specific volume than on temperature. At each of the above pressures, the indications of groups disappear at about the critical specific volume regardless of the higher temperatures at higher pressures. The ionization currents were measured with a direct deflection amplifier employing an FP-54 tube instead of the customary electrometer. With this arrangement data could be taken much more rapidly and the fidelity of the results is, in the limit of observation, the same.
Proceedings of the Iowa Academy of Science
©1934 Iowa Academy of Science, Inc.
Spangler, Ross D.
"The Dependence of Cybotactic Groups on Specific Volume,"
Proceedings of the Iowa Academy of Science, 41(1), 253-254.
Available at: https://scholarworks.uni.edu/pias/vol41/iss1/86