TaO43

TaO43 is not a standard or well-characterized chemical formula in inorganic chemistry, and there is no widely accepted compound that carries this exact stoichiometry. The string may be a typographical error or may reflect a shorthand for related tantalum-oxygen species. In practice, several interpretable readings are possible, depending on context.

One common related compound is Ta2O5, tantalum pentoxide. Ta2O5 is a high-temperature, chemically robust oxide that occurs in monoclinic and other polymorphs. It is widely used as a dielectric material in microelectronics, in optical coatings, and as a catalyst support. Its properties include a high dielectric constant, good thermal stability, and chemical resistance, making Ta2O5 a staple in advanced ceramics and coatings.

Another possible interpretation is the orthotantalate anion TaO4^3−, a tetra-oxide tantalum species in which tantalum is in the +5 oxidation state. This anion can exist in solution and form various salts with alkali or alkaline-earth cations, though it is not typically isolated as a simple discrete solid. In aqueous and solution chemistry, orthotantalate species are discussed within the broader context of tungstate and molybdate analogs.

Non-stoichiometric and polymeric tantalum oxides (TaOx, with x varying around 4–5) also appear in materials science. These phases can exhibit oxygen vacancies and tunable electrical properties, and they have been studied for applications such as thin-film electronics, memristive devices, and catalytic supports.

In summary, TaO43 is not recognized as a standard compound, and the term most likely points to Ta2O5, the orthotantalate anion TaO4^3−, or non-stoichiometric TaOx systems, depending on the specific context.