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- Dickite abstract "Dickite (Al2Si2O5(OH)4) is a phyllosilicate clay mineral named after the metallurgical chemist Allan Brugh Dick, who first described it. It is chemically composed of 20.90%aluminium, 21.76% silicon, 1.56% hydrogen and 55.78% oxygen. It has the same composition as kaolinite, nacrite, and halloysite, but with a different crystal structure (polymorph). Dickite sometimes contains impurities such as titanium, iron, magnesium, calcium, sodium and potassium.Dickite occurs with other clays and requires x-ray diffraction for its positive identification. Dickite is an important alteration indicator in hydrothermal systems as well as occurring in soils and shales. Dickite’s type location is in Pant-y-Gaseg, Amlwch, Isle of Anglesey, Wales, UK, where it was first described in 1888. Dickite appears in locations with similar qualities and is well spread among countries like China, Jamaica, France, Germany, UK, USA, Italy, Belgium and Canada.Dickite has a monoclinic crystal system and its crystal class is domatic (m). This crystal system contains two non-equal axes (a and b) that are perpendicular to each other and a third axis (c) that is inclined with respect to the an axis. The a and c axes lie in a plane. Dickite involves an interlayer bonding with at least 3 identifiable bonds: an ionic type interaction due to net unbalanced charges on the layers, Van der Waals forces between layers and hydrogen bonds between oxygen atoms on the surface of one layer and hydroxyl groups on the opposing surface. A hydrogen bond, as the term is used here, involves a long range interaction between hydrogen of a hydroxyl group coordinated to a cation and an oxygen atom coordinated to another cation. The reaction is predominantly electrostatic; hence an ionic bonding model is appropriate. Its axial ratio is a=0.576, b=1, c=1.6135.Dickite has perfect cleavage in the (001) direction. Its color varies from blue, gray, white to colorless. It usually has a dull clay-like texture. Its hardness on the Mohs scale is 1.5-2, basically between talc and gypsum. This is attributed to its loose chemical bonds. It is held with hydrogen bonds, which are otherwise weak. It leaves a white streak and it has a pearly luster. It has a density of 2.6. Dickite is biaxial, its birefringence is between 0.0050-0.0090, its surface relief is low and it has no dispersion. The plane of the optical axis is normal to the plane of symmetry and inclined 160, rear to the normal to (0,0,1).".
- Dickite thumbnail Dickite-262230.jpg?width=300.
- Dickite wikiPageExternalLink Fialips_p837_03.pdf.
- Dickite wikiPageID "1253157".
- Dickite wikiPageLength "12767".
- Dickite wikiPageOutDegree "88".
- Dickite wikiPageRevisionID "703831286".
- Dickite wikiPageWikiLink Algae.
- Dickite wikiPageWikiLink Algal_mound.
- Dickite wikiPageWikiLink Allan_Brugh_Dick.
- Dickite wikiPageWikiLink Almwch.
- Dickite wikiPageWikiLink Aluminium.
- Dickite wikiPageWikiLink Amlwch.
- Dickite wikiPageWikiLink Anatase.
- Dickite wikiPageWikiLink Anglesey.
- Dickite wikiPageWikiLink Axial_ratio.
- Dickite wikiPageWikiLink Belgium.
- Dickite wikiPageWikiLink Birefringence.
- Dickite wikiPageWikiLink Breccia.
- Dickite wikiPageWikiLink Calcium.
- Dickite wikiPageWikiLink Canada.
- Dickite wikiPageWikiLink Category:Aluminium_minerals.
- Dickite wikiPageWikiLink Category:Clay_minerals_group.
- Dickite wikiPageWikiLink Category:Monoclinic_minerals.
- Dickite wikiPageWikiLink Category:Phyllosilicates.
- Dickite wikiPageWikiLink Chemical_composition.
- Dickite wikiPageWikiLink Chihuahua_(state).
- Dickite wikiPageWikiLink China.
- Dickite wikiPageWikiLink Clay.
- Dickite wikiPageWikiLink Clay_minerals.
- Dickite wikiPageWikiLink Feldspar.
- Dickite wikiPageWikiLink France.
- Dickite wikiPageWikiLink Germany.
- Dickite wikiPageWikiLink Groundwater.
- Dickite wikiPageWikiLink Gypsum.
- Dickite wikiPageWikiLink Halloysite.
- Dickite wikiPageWikiLink Hermann–Mauguin_notation.
- Dickite wikiPageWikiLink Hydrogen.
- Dickite wikiPageWikiLink Hydrogen_bond.
- Dickite wikiPageWikiLink Hydrothermal_circulation.
- Dickite wikiPageWikiLink Hydroxyl.
- Dickite wikiPageWikiLink Intrusive_rock.
- Dickite wikiPageWikiLink Ion.
- Dickite wikiPageWikiLink Ionic_bonding.
- Dickite wikiPageWikiLink Iron.
- Dickite wikiPageWikiLink Italy.
- Dickite wikiPageWikiLink Jamaica.
- Dickite wikiPageWikiLink Kansas.
- Dickite wikiPageWikiLink Kaolinite.
- Dickite wikiPageWikiLink Limestone.
- Dickite wikiPageWikiLink Magmatic_water.
- Dickite wikiPageWikiLink Magnesium.
- Dickite wikiPageWikiLink Metallurgy.
- Dickite wikiPageWikiLink Mohs_scale_of_mineral_hardness.
- Dickite wikiPageWikiLink Monoclinic_crystal_system.
- Dickite wikiPageWikiLink Muscovite.
- Dickite wikiPageWikiLink Nacrite.
- Dickite wikiPageWikiLink Ouray,_Colorado.
- Dickite wikiPageWikiLink Oxygen.
- Dickite wikiPageWikiLink Pant-y-Gaseg.
- Dickite wikiPageWikiLink Pennsylvanian_(geology).
- Dickite wikiPageWikiLink Polymorphism_(materials_science).
- Dickite wikiPageWikiLink Potassium.
- Dickite wikiPageWikiLink Rhyolite.
- Dickite wikiPageWikiLink Sandstone.
- Dickite wikiPageWikiLink Serpentine_subgroup.
- Dickite wikiPageWikiLink Shale.
- Dickite wikiPageWikiLink Silicate_minerals.
- Dickite wikiPageWikiLink Silicon.
- Dickite wikiPageWikiLink Sodium.
- Dickite wikiPageWikiLink Space_group.
- Dickite wikiPageWikiLink St._George,_Utah.
- Dickite wikiPageWikiLink Stratigraphy.
- Dickite wikiPageWikiLink Strike_and_dip.
- Dickite wikiPageWikiLink Talc.
- Dickite wikiPageWikiLink Titanium.
- Dickite wikiPageWikiLink Type_locality_(geology).
- Dickite wikiPageWikiLink United_Kingdom.
- Dickite wikiPageWikiLink United_States.
- Dickite wikiPageWikiLink Van_der_Waals_force.
- Dickite wikiPageWikiLink Volcanic_rock.
- Dickite wikiPageWikiLink Wales.
- Dickite wikiPageWikiLinkText "Allan Brugh Dick".
- Dickite wikiPageWikiLinkText "Dickite".
- Dickite wikiPageWikiLinkText "dickite".
- Dickite 2v "Measured: 50° to 80°".
- Dickite birefringence "δ = 0.005 - 0.006".
- Dickite category Silicate_minerals.
- Dickite category "Kaolinite-serpentine group".
- Dickite cleavage "Perfect on {001}".
- Dickite color "White, with coloration from impurities".
- Dickite dana "71.01".
- Dickite diaphaneity "Transparent".
- Dickite formula "Al2Si2O54".
- Dickite gravity "2.6".
- Dickite habit "Pseudohexagonal crystals, aggregates of platelets and compact massive".
- Dickite luster "Satiny to pearly".
- Dickite mohs "1.5".
- Dickite name "Dickite".
- Dickite opticalprop "Biaxial".