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A green radioactive mineral that is a hydrous crystalline phosphate of uranium and copper.

[After Torbern Olof Bergman (1735-1784), Swedish chemist.]
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.


(Minerals) a green secondary mineral consisting of hydrated copper uranium phosphate in the form of square platelike crystals. Formula: Cu(UO2)2(PO4)2.12H2O
[C19: named after Torbern O. Bergman (1735–84), Swedish chemist; see -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Uranium is found in hundreds of minerals, including uraninite (the most common uranium ore), carnotite, autunite, uranophane, torbernite and coffinite.
In the Preit area, uranium prospecting has yielded good specimens of torbernite crystals and of uranophane in aggregates of acicular crystals with barite.
The primary uranium minerals are uraninite and coffinite but numerous secondary uranium minerals have been formed as a result of the weathering processes: yellow gummites, autunite, metaautunite, torbernite, saleeite, uranotyle, ianthinite and uranopilite (Arribas, 1975).
As for U-containing minerals, beside nasturan plenty of secondary minerals (otenite, torbernite) and some black were present.
Torbernite Musonoi Mine, Shaba Prov., Zaire 3 1/2" wide ex-collections R.
2019 Torbernite (Metatorbernite), Cornwall, England, no.
Torbernite and its slightly dehydrated equivalent, metatorbernite, reach their finest development at the famous Musonoi uranium mine in the Congo.
With Warner's backing, the new company of Warner & Grieger was able to acquire good lots of Bisbee copper minerals, Canyon Diablo meteorites, California benitoite, Yugoslavian wulfenite (Helena mine at Miess--a collection assembled by the mine foreman there), Romanian and Central European minerals, Elba pyrite, Virgin Valley opals (collector specimens), native silver from the Rural mine in Mineral Park (Arizona), a comprehensive selection of minerals from Tsumeb and Klein Spitzkoppe in South-West Africa, English minerals including fluorite, barite, witherite, torbernite and cuprite--all in 1936-1937.
The requests may have been made for relatively modest specimens, a rare book, or a fine cuprosklodowskite or torbernite. Of course, part of Gilbert's fame lay with his near monopoly on uranium minerals.
Fine crystals of Cornish torbernite on matrix, 2.5 inches.
There were Cornish and Russian specimens aplenty: chalcophyllite, torbernite, liroconite crystals to 1 cm, chalcocite crystals to 2 cm, olivenite, copper, crocoite, cerussite, feldspar crystals, etc.
Torbernite occurred with autunite in an altered Tertiary plug on Rhyolite Mountain (Nelson-Moore et al., 1978; Eckel, 1997).