Thallide
Thallides are compounds containing anions composed of thallium. Thallium may occur as a monatomic ion (Tl5− in LiMg2Tl), as a Metal cluster compound, cluster of several atoms (e.g. Tl48−), or as a polyatomic structure Tlnn− in thallides. They are a subclass of trielides, which also includes gallides and Indide, indides. A more general classification is polar intermetallics, as clusters contain delocalized multicentre bonds. Thallides were discovered by Eduard Zintl in 1932. Mixed-anion compounds, Mixed anion compounds with thallides include Halide, halides (Bromide, bromides and Chloride, chlorides), Oxide, oxides, and tetrelates (silicate, germanate). Production Thallide compounds can be produced by melting metals together in a tantalum crucible under an inert argon atmosphere. However if arsenic is included in the mix, it can react with the crucible wall. A low temperature production route, is to dissolve an alkali metal in liquid ammonia, and use that to reduce a th ...
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