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- Laumontite abstract "Laumontite is a mineral, one of the zeolite group. Its molecular formula is Ca(AlSi2O6)2·4H2O, a hydrated calcium-aluminium silicate. Potassium or sodium may substitute for the calcium but only in very small amounts.It is monoclinic, space group C2/m. It forms prismatic crystals with a diamond-shaped cross-section and an angled termination. When pure, the color is colorless or white. Impurities may color it orange, brownish, gray, yellowish, pink, or reddish. It has perfect cleavage on [010] and [110] and its fracture is conchoidal. It is very brittle. The Mohs scale hardness is 3.5-4. It has a vitreous luster and a white streak.It is found in hydrothermal deposits left in calcareous rocks, often formed as a result of secondary mineralization. Host rock types include basalt, andesite, metamorphic rocks and granites.The identification of laumontite goes back to the early days of mineralogy. It was first named lomonite by R. Jameson (System of Mineralogy) in 1805, and laumonite by René Just Haüy in 1809. The current name was given by K.C. von Leonhard (Handbuch der Oryktognosie) in 1821. It is named after Gillet de Laumont who collected samples from lead mines in Huelgoat, Brittany, making them the type locality.Laumontite easily dehydrates when stored in a low humidity environment. When freshly collected, if it has not already been exposed to the environment, it can be translucent or transparent. Over a period of hours to days the loss of water turns it opaque white. In the past, this variety has been called leonhardite, though this is not a valid mineral species. The dehydrated laumontite is very friable, often falling into a powder at the slightest touch.It is a common mineral, found worldwide. It can be locally abundant, forming seams and veins. It is frequently associated with other zeolites, including stilbite and heulandite. Notable occurrences are India; Paterson, New Jersey; Pine Creek, California; Iceland; Scotland; and the Bay of Fundy, Nova Scotia. Prehnite pseudomorphs after laumontite (epimorphs) have been found in India.".
- Laumontite thumbnail Laumontita.jpg?width=300.
- Laumontite wikiPageExternalLink view_structure.pl?src=iza&id=LAU.
- Laumontite wikiPageExternalLink Laumontite.shtml.
- Laumontite wikiPageExternalLink min-2340.html.
- Laumontite wikiPageExternalLink ima98(13).pdf.
- Laumontite wikiPageID "2178786".
- Laumontite wikiPageLength "3993".
- Laumontite wikiPageOutDegree "35".
- Laumontite wikiPageRevisionID "607154762".
- Laumontite wikiPageWikiLink Andesite.
- Laumontite wikiPageWikiLink Basalt.
- Laumontite wikiPageWikiLink Bay_of_Fundy.
- Laumontite wikiPageWikiLink Brittany.
- Laumontite wikiPageWikiLink California.
- Laumontite wikiPageWikiLink Category:Aluminium_minerals.
- Laumontite wikiPageWikiLink Category:Calcium_minerals.
- Laumontite wikiPageWikiLink Category:Monoclinic_minerals.
- Laumontite wikiPageWikiLink Category:Zeolites.
- Laumontite wikiPageWikiLink Gillet_de_Laumont.
- Laumontite wikiPageWikiLink Granite.
- Laumontite wikiPageWikiLink Heulandite.
- Laumontite wikiPageWikiLink Huelgoat.
- Laumontite wikiPageWikiLink Iceland.
- Laumontite wikiPageWikiLink India.
- Laumontite wikiPageWikiLink Metamorphic_rock.
- Laumontite wikiPageWikiLink Mineral.
- Laumontite wikiPageWikiLink Mineralogy.
- Laumontite wikiPageWikiLink Mohs_scale_of_mineral_hardness.
- Laumontite wikiPageWikiLink Nova_Scotia.
- Laumontite wikiPageWikiLink Paterson,_New_Jersey.
- Laumontite wikiPageWikiLink Potassium.
- Laumontite wikiPageWikiLink Prehnite.
- Laumontite wikiPageWikiLink Properties_of_water.
- Laumontite wikiPageWikiLink Pseudomorph.
- Laumontite wikiPageWikiLink René_Just_Haüy.
- Laumontite wikiPageWikiLink Robert_Jameson.
- Laumontite wikiPageWikiLink Scotland.
- Laumontite wikiPageWikiLink Silicate_minerals.
- Laumontite wikiPageWikiLink Sodium.
- Laumontite wikiPageWikiLink Stilbite.
- Laumontite wikiPageWikiLink Type_locality_(geology).
- Laumontite wikiPageWikiLink Zeolite.
- Laumontite wikiPageWikiLink File:Mineraly.sk_-_laumontit.jpg.
- Laumontite wikiPageWikiLinkText "Laumontite".
- Laumontite wikiPageWikiLinkText "laumontite".
- Laumontite category "Tectosilicate - Zeolite group".
- Laumontite cleavage "Perfect, two directions".
- Laumontite color "White, colorless, yellowish, brownish,".
- Laumontite fracture "Uneven".
- Laumontite mohs "4".
- Laumontite name "Laumontite".
- Laumontite wikiPageUsesTemplate Template:Aluminium.
- Laumontite wikiPageUsesTemplate Template:Calcium.
- Laumontite wikiPageUsesTemplate Template:Infobox_mineral.
- Laumontite wikiPageUsesTemplate Template:Oxygen.
- Laumontite wikiPageUsesTemplate Template:Reflist.
- Laumontite wikiPageUsesTemplate Template:Silicon.
- Laumontite subject Category:Aluminium_minerals.
- Laumontite subject Category:Calcium_minerals.
- Laumontite subject Category:Monoclinic_minerals.
- Laumontite subject Category:Zeolites.
- Laumontite hypernym Mineral.
- Laumontite type ChemicalSubstance.
- Laumontite type Group.
- Laumontite type Mineral.
- Laumontite type Group.
- Laumontite type Tectosilicate.
- Laumontite type ChemicalObject.
- Laumontite type Thing.
- Laumontite type Q7946.
- Laumontite comment "Laumontite is a mineral, one of the zeolite group. Its molecular formula is Ca(AlSi2O6)2·4H2O, a hydrated calcium-aluminium silicate. Potassium or sodium may substitute for the calcium but only in very small amounts.It is monoclinic, space group C2/m. It forms prismatic crystals with a diamond-shaped cross-section and an angled termination. When pure, the color is colorless or white. Impurities may color it orange, brownish, gray, yellowish, pink, or reddish.".
- Laumontite label "Laumontite".
- Laumontite sameAs Q389444.
- Laumontite sameAs Laumontita.
- Laumontite sameAs Laumontit.
- Laumontite sameAs Laumontita.
- Laumontite sameAs لومونتیت.
- Laumontite sameAs Laumontite.
- Laumontite sameAs Laumontit.
- Laumontite sameAs Laumontít.
- Laumontite sameAs Laumontite.
- Laumontite sameAs Laumontit.
- Laumontite sameAs Laumontiet.
- Laumontite sameAs Laumontitt.
- Laumontite sameAs Laumontyt.
- Laumontite sameAs m.06srsj.
- Laumontite sameAs Ломонтит.
- Laumontite sameAs Laumontit.
- Laumontite sameAs Laumontit.
- Laumontite sameAs Ломонтит.
- Laumontite sameAs Q389444.
- Laumontite wasDerivedFrom Laumontite?oldid=607154762.
- Laumontite depiction Laumontita.jpg.
- Laumontite isPrimaryTopicOf Laumontite.
- Laumontite name "Laumontite".