Delvauxite, also known as borickite, is a yellow to brown to dark brown
amorphous
In condensed matter physics and materials science, an amorphous solid (or non-crystalline solid, glassy solid) is a solid that lacks the long-range order that is characteristic of a crystal.
Etymology
The term comes from the Greek ''a'' ("wi ...
mineral, sometimes forming a
botryoidal mass.
[http://www.webmineral.com/data/Delvauxite.shtml Webmineral] Its chemical formula is .
[http://rruff.geo.arizona.edu/doclib/hom/delvauxite.pdf Handbook of Mineralogy] and it may sometimes form
stalactite
A stalactite (, ; from the Greek 'stalaktos' ('dripping') via
''stalassein'' ('to drip') is a mineral formation that hangs from the ceiling of caves, hot springs, or man-made structures such as bridges and mines. Any material that is soluble an ...
s.
It was first described in 1838 by Belgian geologist
André Dumont André Dumont may refer to:
* André Dumont (geologist)
* André Dumont (politician)
André Dumont (24 May 1764 at Oisemont – 19 October 1838 at Abbeville), was a French parliamentarian, a regicide, a deputy of the National Convention, Pres ...
and dedicate to chimist
Charles Delvaux de Fenffe
Charles Delvaux de Fenffe, (July 25, 1782, in Rochefort - November 14, 1863, at the Fenffe Castle (Ciergnon) was a Belgian doctor of medicine, doctor of sciences, and professor at the University of Liège. He served as the sixteenth rector of th ...
(1782–1863) who first analysed its chemical composition.
[ It was found in Bernau, Liege, Belgium and Stredocesky, Czech Republic.][
]
References
Calcium minerals
Iron minerals
Phosphate minerals
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