出典:Wiktionary
出典:『Wiktionary』 (2026/02/26 21:35 UTC 版)
From Ancient Greek φῠ́λλον (phŭ́llon, “leaf”) + -ite.
phyllite (countable and uncountable, plural phyllites)
出典:Wikipedia
出典:『Wikipedia』 (2011/02/13 10:59 UTC 版)
Phyllite is a type of foliated metamorphic rock primarily composed of quartz, sericite mica, and chlorite; the rock represents a gradation in the degree of metamorphism between slate and mica schist. Minute crystals of graphite, sericite, or chlorite impart a silky, sometimes golden sheen to the surfaces of cleavage (or schistosity). Phyllite is formed from the continued metamorphism of slate.