Argon is an inert gas in group VIII A of the periodic table with atomic number 18, an atomic weight of 39.948, and a density of 1.40 Mg/m 3. In the solid state it forms an fcc crystal with a melting ...

OF the rare gases, argon is the only one of which the crystal structure is known (F. Simon and V. Simson, Zeit. f. Phys., 25, 160; 1924). We have now been able to determine the crystal structure ...