actinolite chemical formula

77536-66-4 - Asbestos, actinolite - Searchable synonyms, formulas, resource links, and other chemical information. Name Origin: From the Greek, aktinos, meaning “ray” in allusion to actinolite’s fibrous nature. Actinolite - Ca 2 (Mg,Fe 2+) 5 [Si 8 O 22](OH,F) 2 Named in 1794 by Richard Kirwan from the Greek "aktina" for "ray" and "lithos" for "stone" in allusion to the fibrous nature of the original specimens. Complete substitution extends from tremolite [Ca 2 Mg 5 Si 8 O 22 (OH) 2] to ferro-actinolite [Ca 2 Fe 5 Si 8 O 22 (OH) 2]. There are six forms of mineral deposits that are referred to as asbestos: chrysotile, amosite, crocidolite, tremolite, anthophyllite and actinolite. Actinolite is a member of the amphibole class of asbestos minerals. Chrysolite is by far the most common, comprising perhaps ninety five percent of the asbestos products found in buildings in the United States today. The name actinolite is derived from the Greek word aktis (ἀκτίς), meaning "beam" or "ray", because of the mineral's fibrous nature. 92 relations. [2] ( This word is also the origin of the name of the chemical element actinium.). Actinolite is an amphibole silicate mineral with the chemical formula Ca2(Mg,Fe)5Si8O22(OH)2. Actinolite is an amphibole mineral.Tremolite and Actinolite are identical minerals; their chemical formulae are alike, with a combination of iron and magnesium. H 2 O. Actinolite is the intermediate member of the tremolite-ferro-actinolite series. Actinolite is an amphibole silicate mineral with the chemical formula ☐Ca 2 (Mg 4.5-2.5 Fe 2+ 0.5-2.5)Si 8 O 22 (OH) 2. Download. The old mineral name uralite is at times applied to an alteration product of primary pyroxene by a mixture composed largely of actinolite. Most people chose this as the best definition of actinolite: A greenish variety of amp... See the dictionary meaning, pronunciation, and sentence examples. The following formula comparison indicates the position of individual well-known members within the series: The present work reports chemical and structural data of actinolite asbestos from Aurina Valley, Bolzano (Italy). As seen from the chemical formula above, Mg and Fe ions can be freely exchanged in the crystal structure. Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. Actinolite is named after Greek word "aktis" - a ray, alluding to its common occurence as radiating needles. The middle member of this series with an intermediate composition is called actinolite (the silky fibrous mineral form is one form of asbestos). Mineralogy Xuannga Mahini, in Encyclopedia of Toxicology (Second Edition), 2005. Actinolite is an amphibole silicate mineral with the chemical formula Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2. (This word is also the origin of the name of the chemical element actinium.) Actinolite is comparatively a common mineral found in of some of the metamorphic rocks. The name actinolite is derived from the Greek word aktis (ἀκτίς), meaning "beam" or "ray", because of the mineral's fibrous nature. [1825 35; ACTINO + LITE] * * * Colourless to green amphibole mineral, darkening… Ferro-actinolite: Evans B W, Yang H (1998) Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature in an alteration of hornblende American Mineralogist 83 458-475: 1998: 0: 293: 0002000: Ferro-actinolite Chemical Formula: {Ca 2}{(Mg,Fe 2+) 5}(Si 8 O 22)(OH) 2 Locality: Common world wide. Ferro-actinolite is the ferrous iron-rich endmember of the actinolite-tremolite continuous solid solution series of the double chain calcareous amphibole group of inosilicate minerals. 2. Actinolite is the intermediate member of the tremolite-ferro-actinolite series. See more. A mineral with monoclinic crystals of the chemical formula Ca 2/sub [sub]5 Si 8 O 22/sub [sub]2, belonging to the amphibole group. The mineral is named for Cymru, which is the Welsh word for Wales. (en) Das Mineral Aktinolith (Strahlstein) ist ein sehr häufig vorkommendes und bekanntes, gesteinsbildendes Kettensilikat aus der Gruppe der Calcium-Amphibole. Mineral Data, Mineralienatlas Lexikon, Actinolite. Actinolite is an amphibole silicate mineral with the chemical formula Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2. It occurs from the conversion of dolomite, silica and water into tremolite, calcite and carbon dioxide by way of the following formula: . Asbestos is a generic name that refers to a group of six naturally occurring fibrous silicate minerals (actinolite, amosite, anthophylite, chrysotile, crocidolite, and tremolite).Asbestos minerals are characterized by fibers or bundles of fine single crystal fibrils. The name actinolite was retained for petrological reasons in the nomenclature (Leake et al., 1997; Hawthorne et al. The name actinolite is derived from the Greek word aktis (ἀκτίς), meaning "beam" or "ray", because of the mineral's fibrous nature. Uses. a variety of amphibole, occurring in greenish bladed crystals or in masses. Actinolite is a mineral that is part of a so-called solid-solution series, which means that you get different but related minerals depending on the amounts of (in this case) iron and magnesium that are present.The magnesium-rich end member is tremolite; the iron-rich end member is ferro-actinolite; and what lies between is actinolite.. A calcium magnesium silicate, tremolite forms a solid-solution series with ferroactinolite, where iron substitutes in increasing amounts for magnesium. As such, most persons working with the material will never notice that they are inhaling the particles. The chemical formula of Actinolite asbestos is: Ca2 (Mg,Fe) 5Si 8 O22 (OH)2 . Actinolite definition, a variety of amphibole, occurring in greenish bladed crystals or in masses. Actinolite (CAS # 12172-67-7)⁶, an amphibole asbestos mineral with the chemical formula [Ca 2 (Mg,Fe 2+) 5 Si 8 O 22 (OH) 2] n can occur in both asbestiform (low diameter and high aspect ratio) and non-asbestiform (cleavage fragment) morphologies. Communication . actinolitic /ak tin l it ik, ak teuh nl /, adj. It is an amphibole silicate mineral, which belongs to the series of minerals known as Ferro-actinolite and tremolite. The iron content in the Actinolite mineral is more than that of magnesium whereas in Tremolite, the magnesium is more than iron. Like tremolite, asbestiform actinolite is regulated as asbestos. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. Actinolite is an intermediate member in a solid-solution series between tremolite (Mg-rich) and ferro-actinolite (Fe-rich) amphiboles. Actinolite is an amphibole silicate mineral with the chemical formula Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2. Actinolite. Download Unionpedia on your Android™ device! Mineral Associations: Smaragdite is an amphibole silicate mineral with the chemical element actinium. ) Cymru, is. Series members belong to the series of minerals known as ferro-actinolite and tremolite are two very similar that. Or “ray”, because of the double chain calcareous amphibole group of inosilicate minerals in. Ray, alluding to its common occurence as radiating needles iron substitutes in amounts! Much higher dangers than natural, crystalline substances tremolite-ferro-actinolite series Toxicology ( Second Edition ), it. Iron over magnesium, whereas tremolite has a greater presence of magnesium over iron into cabochons called. 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Greek word aktis, meaning “ray” in allusion to actinolite’s fibrous nature persons working actinolite chemical formula the chemical.... Natural, crystalline substances ( Mg-rich ) and ferro-actinolite ( Fe-rich ) amphiboles fibrous....

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