| http://www.w3.org/ns/prov#value | - An Li.sub.2O--Al.sub.2O.sub.3--SiO.sub.2 based crystallized glass disclosed in JP-A-2000-184624 has lithium disilicate (Li.sub.2O.2SiO.sub.2) as a main crystal phase, has a low Li.sub.2O content as from 4% by mass to 8% by mass and is a material
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