Metavivianite () is a

hydrated In chemistry, a hydrate is a substance that contains water or its constituent elements. The chemical state of the water varies widely between different classes of hydrates, some of which were so labeled before their chemical structure was understo ...

iron Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...

phosphate mineral Phosphate minerals are minerals that contain the tetrahedrally coordinated phosphate () anion, sometimes with arsenate () and vanadate () substitutions, along with chloride (Cl−), fluoride (F−), and hydroxide (OH−) anions, that also fit in ...

found in a number of geological environments. As a secondary mineral it is typically formed from oxidizing

vivianite Vivianite () is a hydrated iron(II) phosphate mineral found in a number of geological environments. Small amounts of manganese Mn2+, magnesium Mg2+, and calcium Ca2+ may substitute for iron Fe2+ in its structure.Gaines et al (1997) Dana's New ...

. Metavivianite is typically found as dark blue or dark green prismatic to flattened crystals. It was named by C. Ritz, Eric J. Essene, and Donald R. Peacor in 1974 for its structural relationship to

References

Phosphate minerals Hexahydrate minerals Iron(III) minerals Triclinic minerals Minerals in space group 1 Minerals described in 1974 {{phosphate-mineral-stub

See also

References