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feldspathoid

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Feldspathoid | Mineral Composition, Uses & Characteristics
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. www.britannica.com
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Feldspathoid - Wikipedia
The feldspathoids are a group of tectosilicate minerals which resemble feldspars but have a different structure and much lower silica content. en.wikipedia.org
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ALEX STREKEISEN-Feldspathoid-
The feldspathoid are family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too little silica to form ... www.alexstrekeisen.it
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feldspathoid
@@@LINK=felspathoid Oxford English Dictionary
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Feldspathoid: Mineral information, data and localities. - Mindat.org
A family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too little silica to form feldspar. www.mindat.org
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6.4.4: Feldspathoids - Geosciences LibreTexts
Feldspathoids are a family of about a dozen minerals; they are all Na-, K-, and Ca-aluminosilicates. The family is not like other mineral groups. geo.libretexts.org
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FELDSPATHOID Definition & Meaning - Merriam-Webster
The meaning of FELDSPATHOID is a mineral consisting of an aluminous silicate (as leucite nepheline) that has too little silica to form feldspar. www.merriam-webster.com
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feldspathoid - Wiktionary, the free dictionary
(mineralogy) Any of a small group of igneous, plutonic, and volcanic minerals formed in magma that did not contain enough silica to satisfy all the chemical ... en.wiktionary.org
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Feldspathoids - Geology is the Way
Feldspathoids or foids are a family of rock-forming alkali-bearing aluminosilicates that form only in silica-undersaturated igneous rocks. geologyistheway.com
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Feldspathoid - CAMEO (mfa.org) - Museum of Fine Arts Boston
A feldspar type mineral family that contains sodium-potassium aluminum silicates. Nepheline, a commonly found feldspathoid mineral, is used in the manufacture ... cameo.mfa.org
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Feldspathoid -- from Eric Weisstein's World of Chemistry
Feldspathoid. A anhydrous framework silicate that are chemically similar to the feldspars. They share the feldspar structure, but contain only about two ... scienceworld.wolfram.com
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felspathoid
feldspathoid, felspathoid Min. (ˈfɛldspəθɔɪd, ˈfɛlspəθɔɪd) [f. fel(d)spath (see feldspar, felspar) + -oid.] Any of a group of minerals chemically similar to the feldspars, but containing less silica. Hence ˌfel(d)spaˈthoidal a.1896 J. F. Kemp Handbk. Rocks i. 6 (heading) Feldspathoids. With the feld... Oxford English Dictionary
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Cancrinite
It is classed as a member of the feldspathoid group of minerals; the alkali feldspars that are poor in silica. wikipedia.org
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felsic
felsic, a. Min. (ˈfɛlsɪk) [f. feldspar + lenad (= feldspathoid) + silica + -ic.] Of or pertaining to such light-coloured minerals as the feldspars, the feldspathoids, quartz, and muscovite, or to rocks containing a high proportion of these or similar minerals.1912 W. Cross et al. in Jrnl. Geol. XX. ... Oxford English Dictionary
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Shonkinite
It is unique in having low silica, feldspathoid minerals, and large blocky crystals of black augite. More specifically, it is a mafic foidal (feldspathoid bearing) syenite, a holocrystalline (completely crystalline) intrusive rock which, , is composed wikipedia.org
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