IR-study of the phase composition of boric acid as a component of the glass batch

The reagent "boric acid" of analytical grade grade, which is used in charges for the manufacture of glasses, has been investigated by IR spectroscopy. It was found that the reagent consisted of three components - meta- and orthoboric acids and vitreous boron oxide, water was contained in two forms - molecular and in the form of OH-groups, impurities of organic substances and carbon dioxide are unlikely. Orthoboric acid bands at 1450, 1195, 883, 815 and 548 cm ^-1 were detected for the first time and were not indicated in the previously published reference spectrum. Tab. 2, ill. 3, bibliography: 10 titles.