Results 51 to 60 of about 305 (130)

High-temperature inter-mineral potassium isotope fractionation: implications for K-Ca-Ar chronology. [PDF]

open access: yesACS Earth Space Chem, 2021
Wilson Kuhnel W   +7 more
europepmc   +1 more source

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

Smoky quartz with amazonite

open access: yes
Photographed by Ron Wolf.Columnar smoky quartz crystal with pale blue amazonite, Crystal Peak area, Teller County ...
Wolf, Ron
core  

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

Pet Mineral Project

open access: yes, 2015
The goal of this project was to find the identity and research an unknown mineral throughout the semester. The mineral which I received was Amazonite, which is a variation of microcline feldspar.
Six, Brendan
core  

The Evolution of Late Intrusive Phases in the Georgeville Granite, Nova Scotia [PDF]

open access: yes, 2010
New exposures of the post-orogenic, Georgeville granite reveal the presence of three distinct late-stage phases. The Neoproterozoic pluton is exposed in Georgeville, Nova Scotia, along the Northumberland Strait. Its intrusive age is inferred from a 579.8
Archibald, Donnelly B.
core  

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

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