fcc needle crystals of molybdenum grown from Mo(CO)6

Abstract

It is shown that fcc needle crystals vapor‐grown from Mo(CO)₆ through a cathodic growth process are fcc polymorphs of Mo. Electron diffraction studies coupled with Auger spectroscopy revealed that the needles consist of randomly oriented single microcrystals, whose lattice constant, determined by electron diffraction, is 4.14 – 4.21 Å. This is greater than the theoretically expected value. It is believed that this expanded fcc lattice is attributable primarily to the growth of the needles in a high electric field.