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feldspathoid, any of a group of alkali aluminosilicate minerals similar to the feldspars in chemical composition but either having a lower silica-alkali ratio or containing chloride, sulfide, sulfate, or carbonate. They are considered to be the specific minerals of igneous rocks usually termed alkalic, which is the designation applied to ...
Feldspathoids or foids are a family of rock-forming alkali-bearing aluminosilicates that form only in silica-undersaturated igneous rocks. The name derives from their chemical (and sometimes structural) similarity with feldspars. However, feldspathoids are a 'petrological group', since their members have significantly different structures ...
Feldspar is the name of a large group of rock-forming silicate minerals that make up over 50% of Earth's crust. [1] They are found in igneous, metamorphic, and sedimentary rocks in all parts of the world. Feldspar minerals have very similar structures, chemical compositions, and physical properties. Common feldspars include orthoclase (KAlSi 3 ...
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Feldspar. Feldspar is the name given to a group of minerals distinguished by the presence of alumina and silica (SiO 2) in their chemistry. This group includes aluminum silicates of soda, potassium, or lime. It is the single …
English Translation of "FELDSPATH" | The official Collins French-English Dictionary online. Over 100,000 English translations of French words and phrases.
F, 1957) - Les gisements de feldspath qui caractérisé les skarns de Djebel Aouam (Maroc central), l'infiltration et le remplacement des séries sédimentaires par les solutions hydrothermales conduit au développement de lentilles rubanées de …
Annales des Sciences et Technologie Vol. 3, N° 1, Juin 2011 28 Etude pétrographique et géotechnique des granites de Tissalatine et leurs
Feldspathoids are found chiefly in igneous and metamorphic rocks; they are used as raw materials in the production of alum, glass, and ceramics. feldspathoid, Any of a group of alkali aluminosilicate minerals similar to the feldspars in composition but having a lower silica-alkali ratio or containing chloride, sulfide, sulfate, or carbonate.
In 9 groups, feldspathic surfaces were subjected to sandblasting at 2, 3 or 4 bar pressure for 5, 10 or 15 seconds with 50 µm alumina particles at a 5 mm distance. In …
feldspar, any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium. Feldspars make up more than half of Earth's crust, and professional …
Feldspars are hard minerals, all of them with a hardness of 6 on the Mohs scale. This lies between the hardness of a steel knife (5.5) and the hardness of quartz (7). In fact, feldspar is the standard for hardness 6 in the Mohs scale. Feldspars usually are white or nearly white, though they may be clear or light shades of orange or buff.
Very easy. Easy. Moderate. Difficult. Very difficult. Pronunciation of feldspath with 1 audio pronunciations. 0 rating. Record the pronunciation of this word in your own voice and play it to listen to how you have pronounced it. Can you pronounce this word better.
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Le feldspath améliore la fusibilité de la vaisselle afin d'obtenir un produit sans défaut. Les feldspaths sont utilisés dans la production de verre plat (fenêtres, pare-brise…) mais aussi dans le verre d'emballage. Ils entrent dans la composition des écrans de télévisions et d'ordinateurs ...
Les filons feldspathiques de Taouzzakt-Imiter ne sont en pas en exploitation ce qui exige une étude de faisabilité (géologique, valorisation et réserve) pour monter qu'ils sont exploitables ...
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The feldspathoid minerals are framework silicates similar to feldspars in many of their properties. They are, however, much less common. Feldspathoids are a family of about a dozen minerals; they …
feldspath - traduction français-anglais. Forums pour discuter de feldspath, voir ses formes composées, des exemples et poser vos questions. Gratuit.
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Feldspath synonyms, Feldspath pronunciation, Feldspath translation, English dictionary definition of Feldspath. also fel·spar n. Any of a group of abundant rock-forming minerals occurring in igneous, metamorphic, and sedimentary rocks, and consisting of silicates of...
Nom commun - français. feldspath fɛl.dspat masculin. (Minéralogie) Minéral, d'une texture lamelleuse, composé de silice, d'alumine et de potasse et qui est utilisé pour produire de l'émail blanc. De tous côtés, sur un sable noirâtre, au milieu de laves vésiculaires, s'éparpillaient des cailloux appartenant à ces silicates ...
Chemical tempering. Ion exchange. 1. Introduction. Feldspathic porcelains are the most used ceramic materials in dentistry for the manufacture of indirect …
Définition de « feldspath » Notre dictionnaire de français vous présente les définitions du mot feldspath de manière claire et concise, avec des exemples pertinents pour aider à comprendre le sens du mot. Il comprend des informations supplémentaires telles que des exemples d'expressions, l'étymologie, les synonymes, les homonymes, …
École Supérieure de Technologie, route d'Immouzer, BP. 2427, Fès, Maroc ... du feldspath ainsi que les bandes caractéristiques des carbonates vers 2520. I420 et 880 cm"'. La décarbonatation ...
Feldspath. With a proportion of almost 60 % by weight of the structure of the earth's crust that is accessible for us, feldspars are by far the most frequent group of minerals. Feldspar is a chemically resistant framework silicate with a thick-slated grain morphology. In our production facilities mainly potash feldspars are processed and ...
Lunar meteorites ALHA 81005 and NWA 2996 are feldspathic, polymict, regolith breccias composed of rock and mineral fragments from the lunar highlands (Treiman and Drake, 1983, Gross and Treiman, 2010, Mercer et al., 2013, Korotev, 2013) with very little (NWA 2996) to no (ALHA 81005) KREEP component (Korotev et al., …
French-English translation of "FELDSPATH" | The official Collins French-English Dictionary with over 100,000 English translations.
Feldspathoids are found chiefly in igneous and metamorphic rocks; they are used as raw materials in the production of alum, glass, and ceramics. feldspathoid, Any of a group of …
Dans cette étude, nous examinons l'influence de deux sources de feldspath du Maroc (une pegmatite notée PE et une apatite notée AP) sur les propriétés …
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