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Deutsche Vivianit {m}; Blaueisenerde {f}; Eisenblau {n}; Eisen-Phyllit {m}; Glaukosiderit {m}; Mullinit {m}; natürliches Berlinblau [min.] Synonyme

eisen  
Eisen  ÂFe  (Symbol)  ÂFerrum  
Eisen  Fe (Symbol)  Ferrum  

Englische vivianite; blue ochre; blue iron earth; native Prussian blue Synonyme

vivianite Definition

Vivianite
(n.) 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.

vivianite Bedeutung

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Vivianite (Fe2+Fe2+ 2(PO 4) 2·8H 2O) is a hydrated iron phosphate mineral found in a number of geological environments. Small amounts of manganese Mn2+, magnesium Mg and calcium Ca may substitute for iron Fe2+ in the structure. Pure fresh vivianite is colorless, but the mineral oxidizes very easily, changing the color, and it is usually found as deep blue to deep bluish green prismatic to flattened crystals. Vivianite crystals are often found inside fossil shells, such as those of bivalves and gastropods, or attached to fossil bone.