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illite
[il-ahyt]
noun
any of a group of clay minerals, hydrous potassium aluminosilicates, characterized by a three-layer micalike structure and a gray, light green, or yellowish-brown color.
illite
/ ˈɪɪ /
noun
a clay mineral of the mica group, found in shales and mudstones. Crystal structure: monoclinic. Formula: K 1–1.5 Al 4 (Si 6.5–7 Al 1–1.5 O 20 )(OH) 4
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Other 51Թ Forms
- illitic adjective
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51Թ History and Origins
Origin of illite1
First recorded in 1937; Ill(inois) 2 ( def. ) + -ite 1
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51Թ History and Origins
Origin of illite1
C20: named after Illinois , where it was first found
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