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VIVIANITA [1 record]

Record 1 2011-05-16

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
Fe3(PO4)2.8H2O
formula, see observation
Fe2+3(PO4)2.8H2O
formula, see observation
Fe3+2(PO4)2.8H2O
formula, see observation
DEF

A hydrous phosphate of iron of a blue to green color, growing darker on exposure.

OBS

[This mineral] occurs in monoclinic crystals, also fibrous, massive, and earthy.

OBS

Chemical formula: Fe3(PO4)2.8H2O or Fe2+3(PO4)2.8H2O or Fe3+2(PO4)2.8H2O

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
Fe3(PO4)2.8H2O
formula, see observation
Fe2+3(PO4)2.8H2O
formula, see observation
Fe3+2(PO4)2.8H2O
formula, see observation
DEF

Phosphate hydraté de fer, monoclinique, bleu ou vert quand il est frais, mais qui devient foncé lorsqu'il est exposé à l'air, et qui se casse lorsqu'il se dessèche.

CONT

[...] la vivianite [...] minéral bleu lorsqu'il est frais, [...] apparaît lors de la dégradation des matières organiques dans les tourbières et les lacs.

OBS

[Étymologie :] du nom du minéralogiste anglais J. Vivian.

OBS

Formule chimique : Fe3(PO4)2.8H2O ou Fe2+3(PO4)2.8H2O ou Fe3+2(PO4)2.8H2O

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
Fe3(PO4)2.8H2O
formula, see observation
Fe2+3(PO4)2.8H2O
formula, see observation
Fe3+2(PO4)2.8H2O
formula, see observation
DEF

Fosfato hidratado de hierro [...] que cristaliza en el sistema monoclínico; se encuentra en forma de fibras o de concreciones de color azul verdoso.

OBS

Fórmula química: Fe3(PO4)2.8H2O o Fe2+3(PO4)2.8H2O o Fe3+2(PO4)2.8H2O

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