libethenite


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Related to libethenite: malachite

libethenite

[lə′beth·ə‚nīt]
(mineralogy)
Cu2(PO4)OH An olive-green mineral composed of basic copper sulfate, occurring as small prismatic crystals or in masses.
References in periodicals archive ?
Those crystals and the libethenite specimens were the best things I was able to buy on my trip to the Congo, but their sale would cover only a small part of the cost of the trip.
Crystalline, olive-green libethenite occurs with malachite and radiating azurite in a specimen from the Continental East pit (RJ).
Associated minerals are: quartz, libethenite, pseudomalachite, mitridatite, goethite, cuprite and copper.
Crandallite has been found at the Upper Mex-Tex mine associated with turquoise, libethenite and plumbogummite, as botryoidal white crusts and small spheres.
Previous reports of libethenite at the Mex-Tex mine were based on a single specimen in the collection of Tim Hanson (Taggart et al., 1989).
Solution pH represents an important control on mineral stability with libethenite being formed at low pH relative to pseudomalachite and cornetite at high pH, for constant [Cu.sub.2+](aq) activity.
Chrysocolla endomorphs after libethenite are described, as well as the probable mechanism of formation of chrysocolla pseudomorphs after azurite.
Euhedral orthorhombic crystals (to 0.1 mm) of transparent, pale green libethenite occur associated with cuprite and vesignieite in samples from the 5,260 level.
Other associated minerals include alunite, cuprite, libethenite and malachite.
Lustrous, mm-sized crystals of libethenite coating cavities in quartz gossan have been found at Estremoz.
Judging from the original description and from observations of later-recovered specimens, the associations include pseudomalachite (as blue or green nodules), some malachite, hemimorphite, white prisms of pyromorphite, ultramarine-blue microcrystalline masses of veszelyite, yellow and olive-green crusts of vauquelinite, libethenite (as acicular clusters, as small nodules with a radiating internal structure and also as equant to short prismatic crystals to 3 mm isolated on matrix), green pseudomorphs of reichenbachite after kipushite, quartz, and iron oxides.
Libethenite from Kipushi, for many years listed only in unpublished reports, was described for the first time in the literature as part of the kipushite assemblage (Piret et al., 1985), as acicular clusters.