WebThe series ranges from albite to anorthite endmembers (with respective compositions NaAlSi3O8 to CaAl2Si2O8), where sodium and calcium atoms can substitute for each other in the mineral’s crystal lattice structure. Plagioclase in hand samples is often identified by its polysynthetic crystal twinning or ‘record-groove’ effect. Webalbite, common feldspar mineral, a sodium aluminosilicate (NaAlSi3O8) that occurs most widely in pegmatites and felsic igneous rocks such as granites. It may also be found in …
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http://www.galleries.com/Albite WebAlthough usually not an exceptional collection mineral in itself, albite can be a nice accessory mineral to other mineral species. A variety associated with tourmaline is called cleavelandite and forms extremely thin, platy, …
WebAlbite and Anorthite are the end members of the series, with the intermediary minerals Oligoclase, Andesine, Labradorite, and Bytownite. The acclaimed Dana's System of Mineralogy lists the intermediary members as individual minerals, whereas the IMA does not recognize them as individual mineral species. WebAlbite, usually colorless but sometimes yellow, pink, gray or reddish. Translucent albite is sometime colored green by chrome jadeite. It is also a component of trapiche emeralds. Comments Translucent albite is sometimes found that is colored a rich green by inclusions of chrome-rich jadeite.
WebA sodium plagioclase Feldspar mineral composed of sodium aluminum silicate. Albite is found throughout the world, with major locations in the Alps, Urals, Harz Mountains, France, Norway, and the U.S. (Maine, Virginia, Colorado). The mineral is translucent to opaque with a pearly luster. Although usually white, the brittle, glassy crystals that ... WebMineral: Feldspar; Chemistry: KAlSi 3 O 8; Color: Colorless to White, Gray, Green, Peach, Brown; Refractive index: 1.518 to 1.526; Birefringence: 0.05 to 0.008; Specific gravity: …
WebThe mineral occurs in feldspar -rich rocks, such as granite, syenite, and granodiorite. It is found in granite pegmatites and in metamorphic rocks, such as gneisses and schists. Polymorphism & Series: Dimorphous with orthoclase. Mineral Group: Feldspar (alkali) group; (Si,Al) is completely ordered in low microcline.
WebHardness: 7 - Quartz Luminescence: Fluorescent, Short UV=herry-red blue, Long UV=white. Luster: Vitreous (Glassy) Streak: white Gladstone-Dale: Optical Data: Biaxial … djuri van rijbroekdjurfobiWebAlbite, usually colorless but sometimes yellow, pink, gray or reddish. Translucent albite is sometime colored green by chrome jadeite. It is also a component of trapiche emeralds. … djuren i naturenWebThe new eudialyte-group mineral, odikhinchaite, was discovered in a peralkaline pegmatite vein hosted by melteigite at the Odikhincha ultrabasic alkaline–carbonatite intrusion, Taimyr Peninsula, Krasnoyarsk Krai, Russia. Associated minerals are orthoclase, albite, aegirine, cancrinite, ancylite-(Ce), catapleiite, and wadeite. Odikhinchaite occurs as … djurhonaWebApr 14, 2024 · It is difficult for the albite mineral in nature to reach its theoretical value. The closer the chemical composition of feldspar is to its theoretical value, the purer the feldspar and the... djurfotografWebApr 14, 2024 · It is difficult for the albite mineral in nature to reach its theoretical value. The closer the chemical composition of feldspar is to its theoretical value, the purer the … djuric \u0026 obergerAlbite crystallizes with triclinic pinacoidal forms. Its specific gravity is about 2.62 and it has a Mohs hardness of 6–6.5. Albite almost always exhibits crystal twinning often as minute parallel striations on the crystal face. Albite often occurs as fine parallel segregations alternating with pink microcline in perthite as a … See more Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than 10% anorthite content. The pure albite endmember has the formula See more It occurs in granitic and pegmatite masses (often as the variety cleavelandite), in some hydrothermal vein deposits, and forms part of the typical greenschist metamorphic facies for rocks of originally basaltic composition. Minerals that albite is often considered … See more • Mineral galleries See more Albite was first reported in 1815 for an occurrence in Finnbo, Falun, Dalarna, Sweden. See more Albite is used as a gemstone, albeit semi-precious. Albite is also used by geologists as it is identified as an important rock forming mineral. … See more djurfavoriten