Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Perthite> ?p ?o }
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- Perthite abstract "Perthite is used to describe an intergrowth of two feldspars: a host grain of potassium-rich alkali feldspar (near K-feldspar, KAlSi3O8, in composition) includes exsolved lamellae or irregular intergrowths of sodic alkali feldspar (near albite, NaAlSi3O8, in composition). Typically the host grain is orthoclase or microcline, and the lamellae are albite. If sodic feldspar is the dominant phase, the result is an antiperthite. The intergrowth forms by exsolution due to cooling of a grain of alkali feldspar with a composition intermediate between K-feldspar and albite. There is complete solid solution between albite and K-feldspar at temperatures near 700 °C and pressures like those within the crust of the Earth, but a miscibility gap is present at lower temperatures. If an alkali feldspar grain with an intermediate composition cools slowly enough, K-rich and more Na-rich feldspar domains separate from one another. In the presence of water, the process occurs quickly. When megascopically developed, the texture may consist of distinct pink and white lamellae representing exsolved white albite (NaAlSi3O8) in pink microcline K-feldspar. The intergrowths in perthite have a great variety of shapes. If cooling is sufficiently slow, the alkali feldspar may exsolve to form separate grains with near-endmember albite and K-feldspar compositions. The largest documented single crystal of perthite was found in Hugo Mine, South Dakota, US and measured ~10.7m x 4.6m x 1.8m.The gem varieties of potassium feldspar, amazonite and moonstone are variant colored perthites.".
- Perthite thumbnail Perthite_0.4mm.jpg?width=300.
- Perthite wikiPageExternalLink perthite.htm.
- Perthite wikiPageID "1581172".
- Perthite wikiPageLength "2668".
- Perthite wikiPageOutDegree "19".
- Perthite wikiPageRevisionID "668699572".
- Perthite wikiPageWikiLink Albite.
- Perthite wikiPageWikiLink Alkali_feldspar.
- Perthite wikiPageWikiLink Amazonite.
- Perthite wikiPageWikiLink Category:Feldspar.
- Perthite wikiPageWikiLink Category:Petrology.
- Perthite wikiPageWikiLink Exsolution.
- Perthite wikiPageWikiLink Feldspar.
- Perthite wikiPageWikiLink Lamella_(materials).
- Perthite wikiPageWikiLink Microcline.
- Perthite wikiPageWikiLink Miscibility_gap.
- Perthite wikiPageWikiLink Moonstone_(gemstone).
- Perthite wikiPageWikiLink Orthoclase.
- Perthite wikiPageWikiLink Potassium.
- Perthite wikiPageWikiLink Solid_solution.
- Perthite wikiPageWikiLink South_Dakota.
- Perthite wikiPageWikiLink File:Antiperthitic_feldspar.jpg.
- Perthite wikiPageWikiLink File:Perthite_0.4mm.jpg.
- Perthite wikiPageWikiLink File:Perthitic_feldspar_Dan_Patch_SD.jpg.
- Perthite wikiPageWikiLinkText "Perthite".
- Perthite wikiPageWikiLinkText "Perthitic".
- Perthite wikiPageWikiLinkText "cryptoperthite".
- Perthite wikiPageWikiLinkText "microperthitic".
- Perthite wikiPageWikiLinkText "perthic".
- Perthite wikiPageWikiLinkText "perthite".
- Perthite wikiPageWikiLinkText "perthitic".
- Perthite hasPhotoCollection Perthite.
- Perthite wikiPageUsesTemplate Template:Reflist.
- Perthite subject Category:Feldspar.
- Perthite subject Category:Petrology.
- Perthite type Group.
- Perthite type Group.
- Perthite type Subfield.
- Perthite type Tectosilicate.
- Perthite comment "Perthite is used to describe an intergrowth of two feldspars: a host grain of potassium-rich alkali feldspar (near K-feldspar, KAlSi3O8, in composition) includes exsolved lamellae or irregular intergrowths of sodic alkali feldspar (near albite, NaAlSi3O8, in composition). Typically the host grain is orthoclase or microcline, and the lamellae are albite. If sodic feldspar is the dominant phase, the result is an antiperthite.".
- Perthite label "Perthite".
- Perthite sameAs Pertita.
- Perthite sameAs Պերտիտ.
- Perthite sameAs Perthiet.
- Perthite sameAs Perthitt.
- Perthite sameAs Perthitt.
- Perthite sameAs m.05d38s.
- Perthite sameAs Pertit.
- Perthite sameAs Пертит.
- Perthite sameAs Q2239181.
- Perthite sameAs Q2239181.
- Perthite wasDerivedFrom Perthite?oldid=668699572.
- Perthite depiction Perthite_0.4mm.jpg.
- Perthite isPrimaryTopicOf Perthite.