karbonátokban

Karbonátokban refers to compounds containing the carbonate ion, a polyatomic anion with the chemical formula CO₃²⁻. This ion is composed of one carbon atom covalently bonded to three oxygen atoms. The carbonate ion has a trigonal planar geometry and a resonance structure where the negative charge is delocalized over the oxygen atoms. Carbonates are a very common class of chemical compounds, found widely in nature.

The most abundant naturally occurring carbonate mineral is calcite, which is the primary component of limestone and marble. Other important carbonate minerals include aragonite, dolomite (a calcium magnesium carbonate), and siderite (iron carbonate). These minerals play crucial roles in geological processes, forming sedimentary rocks and contributing to the Earth's crust. Many shells and skeletons of marine organisms, such as mollusks and corals, are also made of calcium carbonate.

In chemistry, carbonates are typically formed by the reaction of a base with carbonic acid. They are generally insoluble in water, although alkali metal carbonates like sodium carbonate (soda ash) and potassium carbonate are soluble. Heating many metal carbonates, particularly those of alkaline earth metals, results in their decomposition into metal oxides and carbon dioxide gas. This property is utilized in industrial processes, such as the production of cement. Carbonates are also important in biological systems, for example, in the formation of bone and teeth.