Results 31 to 40 of about 108 (92)

Thermal dependence of colour and ultraviolet luminescence emission in amazonite feldspar

open access: yes, 2014
Amazonite is a natural blue-green coloured perthitic Pb-bearing feldspar, structurally hydrous occuring in some pegmatite ore deposits. The irradiation-induced colour in amazonite can develop only in K-feldspar having both, structurally bound H2O and Pb impurities.
García-Guinea, Javier   +3 more
openaire   +2 more sources

Geochemistry and Cosmochemistry of Potassium Stable Isotopes. [PDF]

open access: yesChem Erde, 2021
Wang K   +5 more
europepmc   +1 more source

Correlation between the Radiation Induced Colours and the OH-stretching Vibrations of Amazonite

open access: yesZeitschrift für Naturforschung A, 1993
Abstract The changes of colour and the OH-stretching vibrations of amazonites (K-Feldspar) on irradiation have been investigated. It is concluded that the changes are caused by radiation induced crystal defects.
openaire   +1 more source

The toxic influence and biodegradation of carbon nanofibers in freshwater invertebrates of the families Gammaridae, Ephemerellidae, and Chironomidae. [PDF]

open access: yesToxicol Rep, 2020
Chaika V   +15 more
europepmc   +1 more source

The bioarchaeology of mid-Holocene pastoralist cemeteries west of Lake Turkana, Kenya. [PDF]

open access: yesArchaeol Anthropol Sci, 2019
Sawchuk EA   +7 more
europepmc   +1 more source

Mineralogy and petrology of the amazonite pegmatite at Bakstevalåsen, øvre Eiker

open access: yes, 2013
An exotic pegmatite classified as a rare-element gadolinite type amazonite pegmatite is situated in Paleozoic sedimentary rocks, and associated with the peralkaline ekerite granites in the Permian Oslo Region. The amazonite pegmatite is approximately 16 meters long and consists of a coarse-grained, subhedral, green microcline feldspar (amazonite ...
openaire   +2 more sources

A monumental cemetery built by eastern Africa's first herders near Lake Turkana, Kenya. [PDF]

open access: yesProc Natl Acad Sci U S A, 2018
Hildebrand EA   +14 more
europepmc   +1 more source

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