It is shown that the addition of antimony oxide to the composition of the lithium-aluminosilicate glass of the sitall-forming composition makes it possible to suppress the often observed effect of glass cracking during its crystallization at temperatures above 700 ° C. It was found that the introduction of Sb 2 O 3 does not change the phase composition of the resulting sitall. A scenario of the introduction of antimony atoms into the residual glass phase is proposed, which describes the observed effect
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