plagioclase feldspar wikipedia - EAS
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See all on Wikipediahttps://en.wikipedia.org/wiki/PlagioclasePlagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series. This was first shown by the … See more
Plagioclase is the most common and abundant mineral group in the Earth's crust. Part of the feldspar family of minerals, it is abundant in igneous and metamorphic rock, and it is also common as a detrital mineral in See more
Plagioclase is the primary aluminium-bearing mineral in mafic rocks formed at low pressure. It is normally the first and most abundant feldspar to crystallize from a cooling primitive magma. Anorthite has a much higher melting point than albite, and, as a result, calcium … See more
In addition to its importance to geologists in classifying igneous rocks, plagioclase finds practical use as construction aggregate, … See more
Wikipedia text under CC-BY-SA license- https://en.wikipedia.org/wiki/Feldspar
Feldspars are a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the plagioclase (sodium-calcium) feldspars and the alkali (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by w…
Wikipedia · Text under CC-BY-SA license- Category: Tectosilicate
- Mohs scale hardness: 6.0–6.5
- https://en.wikipedia.org/wiki/Oligoclase
- Oligoclase is a rock-forming mineral belonging to the plagioclase feldspars. In chemical composition and in its crystallographic and physical characters it is intermediate between albite and anorthite. The albite:anorthite molar ratio of oligoclase ranges from 90:10 to 70:30. Oligoclase is a high sodium feldspar crystallizing in the triclinic syste...
- Crystal system: Triclinic
- Mohs scale hardness: 6 to 6.5
- https://geology.com/minerals/plagioclase.shtml
- Plagioclase is the name of a group of feldspar minerals that form a solid solution series ranging from pure albite, Na(AlSi3O8), to pure anorthite, Ca(Al2Si2O8). Minerals in this series are a homogenous mixture of albite and anorthite. The names of the minerals in the series are arbitrarily given based upon their relative abundance of albite and an...
- https://en.wikipedia.org/wiki/DaciteSee more on en.wikipedia.orgDacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as rounded, corroded phenocrysts, or as an element of the ground-mass. The plagioclase in dacite ranges from oligoclase to andesine and labradorite. Sanidine occurs, although in …
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- https://en.wikipedia.org/wiki/Anorthite
WebFeldspar: Formula (repeating unit) CaAl 2 Si 2 O 8: IMA symbol: An: Strunz classification: 9.FA.35: Crystal system: Triclinic: Crystal class: Pinacoidal (1) (same H-M symbol) Space group: P 1: Unit cell: a = …
- https://en.wikipedia.org/wiki/Orthoclase
WebOrthoclase, or orthoclase feldspar ( endmember formula K Al Si 3 O 8 ), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture", because its two cleavage …
- https://en.wikipedia.org/wiki/Sodium_hexanitritocobaltate(III)
WebSodium hexanitritocobaltate (III) is inorganic compound with the formula Na3[Co (NO2)6]. The anion of this yellow-coloured salt consists of the transition metal nitrite …
- https://commons.wikimedia.org/wiki/Category:Plagioclase
WebLabradorescent plagioclase feldspar (Marcy Anorthosite, Mesoproterozoic, 1.16 Ga; Route 3 roadcut south of Bartlett Pond, New York State, USA) 2.jpg 4,000 × 3,000; 10.49 MB Low-albite-pV.svg 720 × 540; 57 KB Lunar …
- https://brynmawrmineralogy.fandom.com/wiki/Plagioclase_feldspar
WebPlag is commonly found in igneous and metamorphic rocks. Plag. composition found in common igneous rockas is listed in Nesse's Introduction to Mineralogy in Table 12.4, p. …
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