Über die Einlagerung von unedlen Metallen in Graphit sowie in Metallchalkogenide vom Typ MeX2

Abstract

Under suitable conditions, strongly electropositive metals, such as the alkali metals, the alkaline earth metals, including beryllium and magnesium, as well as aluminium, europium and trivalent rare earth metals form intercalation compounds in the carbon planes of the graphite lattice. The preparation, properties, magnetic behavior, structure, and the nature of bonding in these compounds is discussed.
Metal sulfides and selenides (MeX₂), which posess a conduction band as MoS₂, MoSe₂, WS₂, WSe₂, TiS₂, TiSe₂ among others, react like graphite with metals, if they are dissolved in liquid ammonia, to form non-stoichiometric intercalation compounds. Their magnetic behavior indicates that, while these compounds have metallic character, there is also a transition toward the formation of ionic sulfur and selenide compounds, as shown by the titanium, vanadium and chromium compounds.