IN a previous letter to NATURE upon the crystal structure of xenon, we announced that we would next examine krypton. We have modified the camera used for the previous experiments by reducing to a ...

The elements in group 18 of the periodic table (the “noble gases”) were once considered to be chemically inert. But over the years, chemists discovered how to make molecules that contain them. In the ...

WE have made two Debye-Scherrer exposures of solid krypton at the temperature of liquid hydrogen boiling under normal pressure, one with copper Kα radiation, the other one with unfiltered iron ...