La illita es un mineral de la clase 9 silicatos, según la clasificación de Strunz, del grupo de las micas.Es una arcilla no expansiva, micácea.La illita es un filosilicato o silicato laminar.. Estructuralmente la illita es bastante similar a la moscovita o a la sericita con algo más de silicio, magnesio, hierro, y agua; y ligeramente menos aluminio tetrahédrico y potasio interlaminar.
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Named in 1937 by Ralph E. Grim, R. H. Bray, and W. F. Bradley for one of the co-type localities, in Illinois, USA. In the time period the mineral was named, the probable supposition was that the leaching of interlayer K was a consistent feature throughout the mineral…
Illite Illite is similar to muscovite and is the most common clay mineral, often composing more than 50 percent of the clay-mineral suite in the deep sea. They are characteristic of weathering in temperate climates or in high altitudes in the tropics, and typically reach the ocean via rivers and wind transport. Relict zircon in illite
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Illite is a group of closely related non-expanding clay minerals. Illite is a secondary mineral precipitate, and an example of a phyllosilicate, or layered alumino-silicate.Its structure is a 2:1 sandwich of silica tetrahedron (T) – alumina octahedron (O) – silica tetrahedron (T) layers. The space between this T-O-T sequence of layers is occupied by poorly hydrated potassium cations which ...
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Formula: K 0.65 Al 2 (AlSi) 4 O 10 (OH) 2 Monoclinic Description: Illite refers to a group of clay minerals formed by weathering or hydrothermal alteration of other aluminum-rich minerals. It occurs intermixed with kaolin and other clay minerals. Its identification requires X-Ray analysis. Virtually all shale and many "clay" occurrences reported in Wisconsin are likely partly or entirely ...
FMF - Friends of Minerals Forum, discussion and message board ... As you see, there are some french additions on the label. These were written by the Paris mineral dealer Neree Boubee. Then the Sorbonne bought the specimen, sold it later to the German dealer Fritz Krantz. ... (5 cm aggregate) in illite matrix from Riesenberg quarry ...
PE Illite = 2.33 barns/electron U=PE Illite x r electron = 6.45 barns/cc. Radioactivity: GRapi = 87.50 (Gamma Ray American Petroleum Institute Units) Concentration of Illite per GRapi unit = 1.14 (%) Estimated Radioactivity from Illite - barely detectable : Illite Classification: Dana Class: 71.02.02d.02 Phyllosilicate Sheets of Six-Membered Rings
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The chemical formula of illite is (K,H 3 O) (Al, Mg, Fe) 2 (Si,Al) 4 O 10 [ (OH) 2, (H 2 O)] and its molecular weight is 389.34 g. It is usually gray-white to silvery-white, or greenish-gray in color. The specific gravity of the mineral varies from 2.6 to 2.9. Illite is also called clay mica or hydrous mica or hydrous muscovite.