ANNABERGITE, a mineral consisting of a hydrous nickel
arsenate, Ni3(AsO4)2 + 8H2O, crystallizing in the monoclinic
system and isomorphous with vivianite and erythrite. Crystals
are minute and capillary and rarely met with, the mineral
occurring usually as soft earthy masses and encrustations. A
fineapple-green colour is its characteristic feature. It was long
known (since 1758) under the name nickel-ochre; the name
Annabergite was proposed by H.J. Brooke and W.H. Miller in
1852, from Annaberg in Saxony, one of the localities of the
mineral. It occurs with ores of nickel, of which it is a product
of alteration. A variety, from Creetown in Kirkcudbrightshire,
in which a portion of the nickel is replaced by calcium, has been
called dudgeonite, after P. Dudgeon, who found it.
(L. J. S.)
This page is extract from an ebook created by volunteers. It is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included online at www.gutenberg.org
A few typographical errors have been corrected. They
appear in the text like this, and the
explanation will appear when the mouse pointer is moved over the marked
passage. Sections in Greek will yield a transliteration
when the pointer is moved over them, and words using diacritic characters in the
Latin Extended Additional block, which may not display in some fonts or browsers, will
display an unaccented version.
Links to other EB articles: Links to articles residing in other EB volumes will
be made available when the respective volumes are introduced online.