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???? ?-eucryptite? ???? ???, ??? LAS(Li2O-Al2O3-SiO2)? ???? ?-eucryptite(Li2O·Al2O3·2SiO2) ?? petalite(Li2O·Al2O3·8SiO2)? ????, 1200? ??? ??? ????? ???? ???? ? ?? ?? ???? ??? ???? ? ????? ?? ???
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