arfvedsonite


arfvedsonite
/ahr"vid seuh nuyt'/, n. Mineral.
a sodium-rich amphibole, occurring in green to black crystals in alkalic rocks.
[1830-40; named after J. A. Arfvedson (d. 1841), Swedish chemist; see -ITE1]

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      amphibole mineral, an iron-rich sodium silicate. Lithium and magnesium replace iron in the structure to form eckermannite. Both minerals characteristically occur as dark-green crystals in alkali igneous rocks and their associated pegmatites. For chemical formula and detailed physical properties, see amphibole (table).

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Universalium. 2010.

Look at other dictionaries:

  • Arfvedsonite — is a sodium amphibole mineral with composition: Na3(Fe,Mg)4FeSi8O22(OH)2: sodium, iron, magnesium, inosilicate, hydroxide. It crystallizes in the monoclinic prismatic crystal system and typically occurs as greenish black to bluish grey fibrous to …   Wikipedia

  • arfvedsonite — ˈävə̇dsəˌnīt noun ( s) Etymology: J.A.Arfvedson died 1841 Swedish chemist + English ite : a silicate of sodium, calcium, and iron, approximately Na2 3(Fe,Mg,Al)5Si8O22(OH …   Useful english dictionary

  • arfvedsonite — noun A rare sodium amphibole mineral …   Wiktionary

  • arfvedsonite — arf·ved·son·ite …   English syllables

  • Riébeckite — Riébeckite[1] Catégorie IX : silicates[2] …   Wikipédia en Français

  • Amphibole — Motif cristallin élémentaire des amphiboles Les amphiboles sont une famille de minéraux, silicates de fer, de calcium ou de magnésium. Elles cristallisent dans les systèmes orthorhombique et monoclinique en prismes très allongés, avec un clivage… …   Wikipédia en Français

  • Арфведсонит — Формула NaNa2(Mg;Fe)4Fe(OH)2(Si4O11) Сингония монокл …   Википедия

  • Amphibole — (pronounced amfi bowl) defines an important group of generally dark colored rock forming inosilicate minerals, composed of double chain SiO4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their… …   Wikipedia

  • Nepheline syenite — of the Intrusive Complex of Tanguá, State of Rio de Janeiro, Brasil (Motoki et al., 2011a) Nephelene syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or… …   Wikipedia

  • List of minerals A-B (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia


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