vivianite


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vivianite

(ˈvɪvɪəˌnaɪt)
n
(Minerals) mineralogy a phosphate of iron
References in periodicals archive ?
Small, bright blue concretions were observed that X-ray diffraction confirmed to be the mineral vivianite ([Fe.
It is also possible that phosphate minerals did not form because not enough iron was available for precipitation of variscite, strengite, or vivianite.
There was also vivianite powder, derived from an iron phosphate mineral, to be applied to the face," the paper reported.
This issue of the centennial volume of the journal begins with an article discussing geology, specifically a rare mineral known as vivianite.
Additionally inorganic residues such as ochre, mica and vivianite (an iron mineral found in clays associated with bone or other organic remains) were observed.
2]), which is a hydrous silicate of iron and potassium, or by vivianite ([Fe.
For example, Ptacek (1998) describes the elevated presence of vivianite, an amorphous ferric phosphate, which has been formed following dissolution and subsequent precipitation in the more reduced lower zones of the aquifer.
We believe this is the first reported occurrence of vivianite in western Tennessee.
2010) observed that, although substantial proportions of FeIII oxide sorbents were dissolved in anoxic soils, the majority of anoxic soils had higher maximum sorption than their oxic counterparts, most likely due to precipitation of iron(II) phosphates such as vivianite.
Thin section and scanning electron microscope images reveal that these cleavages are defined by microveins of calcite, gypsum, and montmorillonitic clays with hematite and vivianite, and that there is some evidence for silica dissolution.
Vivianite, which is only persistent under the absence or lack of oxygen, was found in the subsoil of a Haplocryod on an abandoned penguin rookery (Blume et al.