Vivianite

Vivianite

Vivianite Fe3(PO4)2·8(H2O), hydrated iron phosphate, is a secondary mineral found in a number of geological environments. Usually found as deep blue to deep bluish green prismatic to flattened crystals, most crystals rather small to microscopic, larger ones are rare.

It is formed by the alteration of ore deposits near the surface, or of primary phosphates in pegmatites. Vivianite crystals are often found inside fossil shells, such as those of bivalves and gastropods, or attached to fossil bone.

Vivianite darkens upon exposure to light, and was named in 1817 after J.G.Vivian, an English mineralogist who first discovered crystals of the mineral in Cornwall.

Notable localities are Russia, Ukraine, Namibia, England, and Maryland, Colorado in the United States, and the town of Iwama, Japan.

The type locality is Wheal Kind, in St Agnes, Cornwall. [ [http://www.mindat.org/min-4194.html Vivianite: Vivianite mineral information and data ] ]

ee also

*List of minerals
*List of minerals named after people

References

* [http://webmineral.com/data/Vivianite.shtml Webmineral data]
* [http://sciencelinks.jp/j-east/article/199911/000019991199A0349754.php]


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  • Vivianite — Viv i*an*ite, n. [So called by Werner after the English mineralogist F. G. Vivian.] (Min.) A hydrous phosphate of iron of a blue to green color, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.… …   The Collaborative International Dictionary of English

  • vivianite — ● vivianite nom féminin (de J. G. Vivian, nom propre) Phosphate hydraté naturel de fer, monoclinique …   Encyclopédie Universelle

  • vivianite — s. f. [Mineralogia] Fosfato hidratado natural de ferro.   ♦ Grafia no Brasil: vivianita …   Dicionário da Língua Portuguesa

  • vivianite — vivianitas statusas T sritis chemija apibrėžtis Mineralas. formulė Fe₃[PO₄]₂·8H₂O atitikmenys: angl. vivianite rus. вивианит …   Chemijos terminų aiškinamasis žodynas

  • vivianite — /viv ee euh nuyt /, n. a secondary mineral, hydrous ferrous phosphate, Fe3(PO4)2·8H2O, occurring in the form of pale blue crystals or powder. [1815 25; named after J. G. Vivian, 19th century English mineralogist, who found it; see ITE1] * * * ▪… …   Universalium

  • vivianite — noun A blue, green or colourless mineral of monoclinic crystals, Fe(PO) middot;8HO …   Wiktionary

  • vivianite — viv·i·an·ite …   English syllables

  • vivianite — /ˈvɪviənaɪt/ (say viveeuhnuyt) noun a rare, blue, crystalline mineral phosphate of iron, Fe3 (PO4)2.8H2O. {named after JG Vivian, 19th century English mineralogist + ite1} …  

  • vivianite — ˈvivēəˌnīt noun ( s) Etymology: German vivianit, from J. G. Vivian, 19th century English mineralogist + German it ite : a mineral Fe3(PO4)2.8H2O consisting of a hydrous ferrous phosphate that has limited isomorphism with annabergite, erythrite,… …   Useful english dictionary

  • Érythrite — Catégorie VIII : phosphates, arséniates, vanadates[1] Érythrite Bou Azzer Maroc (5.5x4.5 cm ; XX 1.7 cm) …   Wikipédia en Français

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