Sericite

sericite

[′ser·ə‚sīt] (mineralogy) A white, fine-grained potassium mica, usually muscovite in composition, having a silky luster and found as small flakes in various metamorphic rocks.

Sericite

a variety of white mica, usually muscovite, KAl₂[AlSi₃O₁₀](OH)₂, less commonly, paragonite, NaAl₂[AlSi₃O₁₀](OH)₂. Sericite often contains less potassium (sodium) and more water, SiO₂, and MgO and approaches the composition of hydromicas, such as illite and phengite. It is usually encountered as small flakes and scales with a silky luster. As a secondary mineral, sericite is very common in hydrothermally altered igneous and metamorphic rocks, in sericite schists, and in the selvages of ore bodies, where it occurs with quartz, carbonates, chlorite, sulfides, barite, talc, and, less commonly, with fluorite and tourmaline.

单词	sericite
释义	sericite sericite (ˈsɛrɪˌsaɪt) nany of several varieties of white or greenish mica with a silky sheen, predominantly muscovite, but also illite or paragonite Sericite sericite [′ser·ə‚sīt] (mineralogy) A white, fine-grained potassium mica, usually muscovite in composition, having a silky luster and found as small flakes in various metamorphic rocks. Sericite a variety of white mica, usually muscovite, KAl₂[AlSi₃O₁₀](OH)₂, less commonly, paragonite, NaAl₂[AlSi₃O₁₀](OH)₂. Sericite often contains less potassium (sodium) and more water, SiO₂, and MgO and approaches the composition of hydromicas, such as illite and phengite. It is usually encountered as small flakes and scales with a silky luster. As a secondary mineral, sericite is very common in hydrothermally altered igneous and metamorphic rocks, in sericite schists, and in the selvages of ore bodies, where it occurs with quartz, carbonates, chlorite, sulfides, barite, talc, and, less commonly, with fluorite and tourmaline.
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