Tephroite

Tephroite

Tephroite is a non-metallic manganese silicate mineral with the formula, Mn2SiO4, that is one of the unusual minerals found at the famous mines of Sterling Hill and Franklin, New Jersey, USA. It can also be found in England and Sweden.

Tephroite has a hardness of 6 and a specific gravity of approximately 4.1, which is heavy for non-metallic minerals. Its name comes from the Greek "tephros", "ash gray", for its color. It can also be found olive-green, greenish-blue, pink, or brown.

References

* [http://webmineral.com/data/Tephroite.shtml Webmineral data]
* [http://mineral.galleries.com/minerals/silicate/tephroit/tephroit.htm Mineral galleries]
* [http://rruff.geo.arizona.edu/doclib/hom/tephroite.pdf Mineral Data Publishing]


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Look at other dictionaries:

  • Tephroite — Teph ro*ite, n. [See {Tephrosia}.] (Min.) A silicate of manganese of an ash gray color. [1913 Webster] …   The Collaborative International Dictionary of English

  • téphroïte — ● téphroïte nom féminin Silicate naturel de manganèse, orthorhombique, du groupe de l olivine …   Encyclopédie Universelle

  • tephroite — /tef roh uyt /, n. a mineral, silicate of manganese, Mn2SiO4, occurring in orthorhombic crystals. [1865 70; < G Tephroit < Gk tephró(s) ash gray + G it ITE1] * * * ▪ mineral       olivine mineral found only in iron manganese ore deposits and… …   Universalium

  • tephroite — ˈtefrōˌīt noun ( s) Etymology: German tephroit, from Greek tephros ash gray + German it ite : a mineral Mn2SiO4 that consists of Manganese silicate and is isomorphous with olivine * * * /tef roh uyt /, n. a mineral, silicate of manganese, Mn2SiO4 …   Useful english dictionary

  • téphroïte — (entrée créée par le supplément) (té fro i t ) s. f. Terme de minéralogie. Silicate de manganèse et de magnésie, brun rougeâtre. ÉTYMOLOGIE    Du grec, cendre, et, forme …   Dictionnaire de la Langue Française d'Émile Littré

  • tephroite — teph·ro·ite …   English syllables

  • olivine — olivinic /ol euh vin ik/, olivinitic /ol euh vi nit ik/, adj. /ol euh veen , ol euh veen /, n. Mineral. any of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive green to gray green masses as an important constituent of basic… …   Universalium

  • Tephroit — und Willemit aus der Franklin Mine, Sussex County (New Jersey), USA Chemische Formel Mn2SiO4 …   Deutsch Wikipedia

  • Fayalite — Catégorie IX : silicates[1] Fayalite Coso Hot Springs, Californie, États Unis (XX 1 mm) …   Wikipédia en Français

  • Forsterite — (big tabular and colorless) on sanidine (little colorless crystals)<bg />with hematite (redish) General …   Wikipedia

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