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- Pigeonite abstract "Pigeonite is a mineral in the clinopyroxene group. It has a general formula of (Ca,Mg,Fe)(Mg,Fe)Si2O6. The calcium cation fraction can vary from 5% to 25%, with iron and magnesium making up the rest of the cations.Pigeonite crystallizes in the monoclinic system, as does augite, and a miscibility gap exists between the two minerals. At lower temperatures, pigeonite is unstable relative to augite plus orthopyroxene. The low-temperature limit of pigeonite stability depends upon Fe/Mg ratio in the mineral and is hotter for more Mg-rich compositions; for a Fe/Mg ratio of about 1, the temperature is about 900 °C. The presence of pigeonite in an igneous rock thus provides evidence for the crystallization temperature of the magma, and hence indirectly for the water content of that magma.Pigeonite is found as phenocrysts in volcanic rocks on Earth and as crystals in meteorites from Mars and the Moon. In slowly cooled intrusive igneous rocks, pigeonite is rarely preserved, but textural evidence of its breakdown to orthopyroxene plus augite may be present, as shown in the accompanying microscopic image.Pigeonite is named for its type locality on Lake Superior's shores at Pigeon Point, Minnesota, United States. It was first described in 1900.".
- Pigeonite thumbnail PyroxeneExsol_0.5mmm.jpg?width=300.
- Pigeonite wikiPageID "4167941".
- Pigeonite wikiPageLength "4239".
- Pigeonite wikiPageOutDegree "36".
- Pigeonite wikiPageRevisionID "695267410".
- Pigeonite wikiPageWikiLink Augite.
- Pigeonite wikiPageWikiLink Bushveld_Igneous_Complex.
- Pigeonite wikiPageWikiLink Calcium.
- Pigeonite wikiPageWikiLink Category:Calcium_minerals.
- Pigeonite wikiPageWikiLink Category:Iron_minerals.
- Pigeonite wikiPageWikiLink Category:Magnesium_minerals.
- Pigeonite wikiPageWikiLink Category:Pyroxene_group.
- Pigeonite wikiPageWikiLink Hermann–Mauguin_notation.
- Pigeonite wikiPageWikiLink Igneous_rock.
- Pigeonite wikiPageWikiLink Iron.
- Pigeonite wikiPageWikiLink Lake_Superior.
- Pigeonite wikiPageWikiLink Magma.
- Pigeonite wikiPageWikiLink Magnesium.
- Pigeonite wikiPageWikiLink Mars.
- Pigeonite wikiPageWikiLink Meteorite.
- Pigeonite wikiPageWikiLink Monoclinic_crystal_system.
- Pigeonite wikiPageWikiLink Moon.
- Pigeonite wikiPageWikiLink Oxygen.
- Pigeonite wikiPageWikiLink Phenocryst.
- Pigeonite wikiPageWikiLink Pigeon_Point,_Minnesota.
- Pigeonite wikiPageWikiLink Pyroxene.
- Pigeonite wikiPageWikiLink Silicate_minerals.
- Pigeonite wikiPageWikiLink Silicon.
- Pigeonite wikiPageWikiLink Solid_solution.
- Pigeonite wikiPageWikiLink Space_group.
- Pigeonite wikiPageWikiLink Type_locality_(geology).
- Pigeonite wikiPageWikiLink Volcanic_rock.
- Pigeonite wikiPageWikiLinkText "Pigeonite".
- Pigeonite wikiPageWikiLinkText "pigeonite".
- Pigeonite 2v "0".
- Pigeonite birefringence "δ = 0.021 - 0.030".
- Pigeonite caption "Polarized light microscope image of part of a grain of orthopyroxene containing exsolution lamellae of augite The texture documents a multistage history: crystallization of twinned pigeonite, followed by exsolution of augite; breakdown of pigeonite to orthopyroxene plus augite; exsolution of augite parallel to the former twin plane of pigeonite.".
- Pigeonite category Pyroxene.
- Pigeonite category Silicate_minerals.
- Pigeonite cleavage "Good on {110}, ^ ~87°".
- Pigeonite color "Brown, greenish brown-black".
- Pigeonite dana "65.01".
- Pigeonite diaphaneity "Semitransparent".
- Pigeonite dispersion "weak to distinct".
- Pigeonite formula "Si2O6".
- Pigeonite fracture "Conchoidal".
- Pigeonite gravity "3.17".
- Pigeonite habit "Prismatic crystals, to 1 cm; granular, massive.".
- Pigeonite luster "Vitreous to dull".
- Pigeonite mohs "6".
- Pigeonite name "Pigeonite".
- Pigeonite opticalprop "Biaxial".
- Pigeonite pleochroism "Weak to moderate; X = colorless, pale green, brown; Y = pale brown, pale brownish green, brownish pink; Z = colorless, pale green, pale yellow".
- Pigeonite refractive "nα = 1.683 - 1.722 nβ = 1.684 - 1.722 nγ = 1.704 - 1.752".
- Pigeonite streak "Grey white".
- Pigeonite strunz "9".
- Pigeonite symmetry Hermann–Mauguin_notation.
- Pigeonite symmetry "Monoclinic prismatic".
- Pigeonite symmetry "Space group: P 21/c".
- Pigeonite system Monoclinic_crystal_system.
- Pigeonite tenacity "Brittle".
- Pigeonite twinning "Commonly twinned simply or multiply on {100} or {001}".
- Pigeonite unitCell "a = 9.7 Å, b = 8.95 Å, c = 5.24 Å; β = 108.59°; Z = 4".
- Pigeonite wikiPageUsesTemplate Template:Infobox_mineral.
- Pigeonite wikiPageUsesTemplate Template:Overline.
- Pigeonite wikiPageUsesTemplate Template:Reflist.
- Pigeonite subject Category:Calcium_minerals.
- Pigeonite subject Category:Iron_minerals.
- Pigeonite subject Category:Magnesium_minerals.
- Pigeonite subject Category:Pyroxene_group.
- Pigeonite hypernym Mineral.
- Pigeonite type ChemicalSubstance.
- Pigeonite type Group.
- Pigeonite type Mineral.
- Pigeonite type Group.
- Pigeonite type Inosilicate.
- Pigeonite type ChemicalObject.
- Pigeonite type Thing.
- Pigeonite type Q7946.
- Pigeonite comment "Pigeonite is a mineral in the clinopyroxene group. It has a general formula of (Ca,Mg,Fe)(Mg,Fe)Si2O6. The calcium cation fraction can vary from 5% to 25%, with iron and magnesium making up the rest of the cations.Pigeonite crystallizes in the monoclinic system, as does augite, and a miscibility gap exists between the two minerals. At lower temperatures, pigeonite is unstable relative to augite plus orthopyroxene.".
- Pigeonite label "Pigeonite".
- Pigeonite sameAs Q425175.
- Pigeonite sameAs Pigeonita.
- Pigeonite sameAs Pigeonit.
- Pigeonite sameAs Pigeonita.
- Pigeonite sameAs Pigeonite.
- Pigeonite sameAs xd7xa4xd7x99xd7x92xd7x95xd7xa0xd7x99xd7x98.
- Pigeonite sameAs Pigeonite.
- Pigeonite sameAs ピジョン輝石.
- Pigeonite sameAs Pigeoniet.
- Pigeonite sameAs Pigeonitt.
- Pigeonite sameAs m.0bmtm7.
- Pigeonite sameAs Піжоніт.
- Pigeonite sameAs Q425175.
- Pigeonite wasDerivedFrom Pigeonite?oldid=695267410.
- Pigeonite depiction PyroxeneExsol_0.5mmm.jpg.
- Pigeonite isPrimaryTopicOf Pigeonite.
- Pigeonite name "Pigeonite".