variscite


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var·i·scite

 (vâr′ĭ-sīt′, văr′-)
n.
A rare, light to dark or bluish green, translucent mineral, Al(PO4)·2H2O, found in aluminum-rich rocks and sometimes used as a semiprecious stone.

[German Variscit, from Medieval Latin Variscia, ancient name for Vogtland, region of Germany where the mineral was discovered.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

variscite

(ˈværɪˌsaɪt)
n
(Minerals) a green secondary mineral consisting of hydrated aluminium phosphate
[from Medieval Latin Variscia, the district of Vogtland in Saxony]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
Veith JA, Sposito G (1977) Reactions of aluminosilicates, aluminum hydrous oxides, and aluminum oxide with o-phosphate: the formation of X-ray amorphous analogs of variscite and montebrasite.
Basic features of the variscite extraction in Palazuelo de las Cuevas (Zamora)
We have implemented CGW based on Variscite System-on-Module (SoM) with Linux Debian operating system.
The gemological and mineral characteristics of variscite from Ma'anshan of Anhui Province.
For example, the mineral variscite (AlP[O.sub.4*]2[H.sub.2]O) may precipitate when soil pH is below 5.5, anaerobic conditions are present, and aluminum and phosphate are available.
In 1834, the Heidelberger-Mineralien Comptoir sold what would become the type specimen for variscite to August Breithaupt.
Inspired by the Southwest, The Suzanne ($40) features a subtle heel and multiple stones in finishes of turquoise, coral, variscite, opal, and onyx.
Lindsay (1979) described minerals such as variscite, strengite, and barrandite are insoluble at pH <2, but readily hydrolysed when the pH is increased, such as in the presence of NaOH.
Lindsay (1979) showed that at a pH greater than 6.5 the most stable P minerals were Ca phosphates and at a pH less than 6.5, Al and Fe phosphates such as variscite and strengite were most stable.
Secondary hydrous oxide minerals such as stengite (Fe(P[O.sub.4]) x [H.sub.2]O) and variscite (Al(P[O.sub.4]) x 2[H.sub.2]O) are extremely insoluble P forms (Table 10-4).