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Illite, also called hydromica or hydromuscovite, 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…
Overview & Illite crystallinity
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muscovite group potassium phyllosilicate monoclinic layers occurs small x-ray analysis may sediments described illinois variety mw-parser-output minerals space formula h3o
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Illite | Category | Phyllosilicate minerals | 1.00 | infobox |
| Illite | Cleavage | {001} Perfect | 1.00 | infobox |
| Illite | Color | Grey-white to silvery-white, greenish-gray | 1.00 | infobox |
| Illite | Crystal class | Prismatic (2/m) (same H-M symbol) | 1.00 | infobox |
| Illite | Crystal habit | Micaceous aggregates | 1.00 | infobox |
| Illite | Crystal system | Monoclinic | 1.00 | infobox |
| Illite | Dana classification | 71.02.02d.02 | 1.00 | infobox |
| Illite | Diaphaneity | Translucent | 1.00 | infobox |
| Illite | Formula | .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:l… | 1.00 | infobox |
| Illite | Group | Mica group, dioctahedral mica group | 1.00 | infobox |
| Illite | IMA status | Variety of muscovite | 1.00 | infobox |
| Illite | IMA symbol | Ilt | 1.00 | infobox |
| Illite | Luster | Pearly to dull | 1.00 | infobox |
| Illite | Mohs scale hardness | 1–2 | 1.00 | infobox |
| Illite | Optical properties | Biaxial (−) | 1.00 | infobox |
| Illite | Refractive index | nα = 1.535 – 1.570 nβ = 1.555 – 1.600 nγ = 1.565 – 1.605 | 1.00 | infobox |
| Illite | Space group | C2/m (no. 12) | 1.00 | infobox |
| Illite | Specific gravity | 2.6–2.9 | 1.00 | infobox |
| Illite | Streak | white | 1.00 | infobox |
| Illite | Strunz classification | 9.EC.60 | 1.00 | infobox |
| Illite | is a | secondary mineral precipitate | 0.90 | text |
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