Ilvaite

Ilvaite

Ilvaite is a sorosilicate of iron and calcium with formula: CaFe2+2Fe3+Si2O7O(OH). Both manganese and magnesium substitute in the structure. Ilvaite crystallizes in the orthorhombic system in black prismatic crystals and columnar masses. It is black to brownish black to gray and opaque. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 3.8 to 4.1. Ilvaite is structurally related to lawsonite.

It occurs in contact metamorphic rocks and skarn ore deposits. It also occurs less commonly in syenites.

Ilvaite was first described in 1811 on the island of Elba and the name ilvaite from the Latin name "ilva" of the island. Sometimes referred to as Yenite

References

* [http://webmineral.com/data/Ilvaite.shtml Webmineral]
* [http://mineral.galleries.com/minerals/silicate/ilvaite/ilvaite.htm Mineral galleries]
* [http://www.mindat.org/show.php?id=2016&ld=1&pho= Mindat w/ locations]


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Look at other dictionaries:

  • Ilvaite — Il va*ite, n. [From L. Ilva, the island now called Elba.] (Min.) A silicate of iron and lime occurring in black prismatic crystals and columnar masses. [1913 Webster] …   The Collaborative International Dictionary of English

  • ilvaite — Yenite Ye nite, n. [After Jena, in Germany.] (Min.) A silicate of iron and lime occurring in black prismatic crystals; also called {ilvaite}. [Spelt also {jenite}.] [1913 Webster] …   The Collaborative International Dictionary of English

  • ilvaite — ilvaitas statusas T sritis chemija apibrėžtis Mineralas. formulė CaFe₃[OH|O|Si₂O₇] atitikmenys: angl. ilvaite rus. ильваит …   Chemijos terminų aiškinamasis žodynas

  • ilvaite — ˈilvəˌīt noun ( s) Etymology: German ilvait, from Ilva (Elba), Italian island in the Mediterranean + German it ite : a silicate CaFe3Si2O8(OH) of iron and calcium and sometimes manganese related to epidote and occurring in black prismatic… …   Useful english dictionary

  • ilvaite — noun A black, crystalline sorosilicate of iron and calcium …   Wiktionary

  • ilvaïte — (entrée créée par le supplément) (il va i t ) s. f. Terme de minéralogie. Silicate double de fer et de chaux …   Dictionnaire de la Langue Française d'Émile Littré

  • ilvaite — il·va·ite …   English syllables

  • Ilvait — und Quarz aus Serifos, Griechenland (Größe: 3,9 x 2,1 x 1,8 cm) Chemische Formel Ca(Fe2+)2Fe3+[O|OH|Si2O7][1] …   Deutsch Wikipedia

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

  • List of minerals F-J (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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