Delvauxite, also known as borickite, is a yellow to brown to dark brown
amorphous mineral
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2 ...
, sometimes forming a
botryoidal
A botryoidal ( ) texture or mineral habit, is one in which the mineral has an external form composed of many rounded segments, named for the Ancient Greek (), meaning "a bunch of grapes".Adjective form: ''botruoeidēs'' This is a common form f ...
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
stalactites.
It was first described in 1838 by Belgian chemist, Dumont and dedicate to J.S.P.J. Delvaux de Fenffe (1782–1863).
[ It was found in Bernau, Liege, ]Belgium
Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to th ...
and Stredocesky, Czech Republic
The Czech Republic, or simply Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The ...
.[
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References
Calcium minerals
Iron minerals
Phosphate minerals
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