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Any of a wide range of ionic compounds that have negative ions containing boron and oxygen (see formulae). Lithium borate, for example, contains the simple anion B(OH)4. Most borates, however, are inorganic polymers with rings, chains, or other networks based on the planar BO3 group or the tetrahedral BO3(OH) group. ‘Hydrated’ borates are ones containing –OH groups; many examples occur naturally. Anhydrous borates, which contain BO3 groups, can be made by melting together boric acid and metal oxides.


Subjects: Chemistry.

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