Rare Earth Elements in the Lignite Ash Determination Method Development

Подкопаев, О. И.; Balakchina, Ekaterina S.; Kopytkova, S. A.; Лосев, В. Н.; Kulagin, Vladimir A.; Shimanskii, A. F.

doi:10.17516/1999-494x-2016-9-8-1238-1246

Cited by 3 publications

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“…The maximum of the "oxygen" band in the Germanium IR spectrum with oxygen concentration of the order of 10 16 cm −3 corresponds to 843 cm −1 according to our data [13].…”

Section: Introductionsupporting

confidence: 81%

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Oxygen Impurity in Germanium Single Crystals Determination by Infrared Spectrometry

Shimanskii

Подкопаев²,

Баранов

2015

AMR

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Oxygen impurity in Germanium single crystals has been characterized using Fourier transformed infrared spectrometry. The crystals were grown by Czochralski method in an argon atmosphere. The oxygen concentration in crystals was determined on optical density from the absorption band at 843 cm−1. It was established that oxygen dissolved concentration in Germanium is variable from 0,2·1016 to 1,3·1016 сm−3. The oxygen band maximum shifts toward 856 cm−1 when its concentration increases under the influence of annealing in the oxygen containing atmosphere with ≤ 10−3 Па.

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“…The maximum of the "oxygen" band in the Germanium IR spectrum with oxygen concentration of the order of 10 16 cm −3 corresponds to 843 cm −1 according to our data [13].…”

Section: Introductionsupporting

confidence: 81%

“…Low oxygen pressure was used to prevent the formation of germanium oxide on the surface of the samples, according to the results of [13]. The annealing temperature does not exceed 673 K to avoid the thermal donors formation on the oxygen basis [8].…”

Section: Materials Science and Engineering Technology IIImentioning

confidence: 99%

Oxygen Impurity in Germanium Single Crystals Determination by Infrared Spectrometry

Shimanskii

Подкопаев²,

Баранов

2015

AMR

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“…На сегодняшний день эти металлы относятся к критически важным для ряда современных технологий [1], поэтому исследования, посвященные определению содержаний РЗЭ в различных объектах [2,3], весьма актуальны. Возрастание потребления РЗЭ приводит к необходимости разведки и включения в разработку новых месторождений [4,5], поисков альтернативных/нетрадиционных источников этих элементов [6], а также изучения их негативного влияния на окружающую среду и живые организмы [7,8]. Содержание и особенности распределения вы-сокозарядных элементов (ВЗЭ: Ti, Zr, Nb, Hf, Ta, Th, U, зачастую к ним причисляют также РЗЭ) в горных породах используют в различных геолого-геохимических исследованиях [9].…”

Section: Introductionunclassified

Influence of Sample Pretreatment on the Analysis of High Contents of Rare-Earth and High Field Strength Elements in Geological Samples by ICP-AES and ICP-MS (Case Study of the Tomtor Deposit)

Saryg-ool

Букреева

Myagkaya

et al. 2020

Journal of Siberian Federal University. Chemistry

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Influence of sample pretreatment on the analysis of the high contents of rare earth (REE) and high field strength (HFSE) elements in geological samples by inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) was studied. The rocks and rich ores of the Tomtor Nb-REE deposit were explored. Complete dissolution of the geological samples with a high content of “refractory” minerals has been achieved using fusion with a sodium peroxide. The results obtained by ICP-AES and ICP-MS after chemical dissolution are comparable with the results obtained by the XRF-SR without chemical pretreatment

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Geologic and Geochemical Features of Cretaceous Ge-Bearing Lignites in the Yenisei Middle Reaches

Naidko

Макаров

Koz’min³

et al. 2019

Russian Geology and Geophysics

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—Integrated geological and geochemical studies were performed for lignite from the Yenisei middle reaches, represented by carbonized fragments of trees with high germanium contents. Geochemical characteristics of terrigenous sediments with Ge-bearing lignite are determined. The chemical and mineral compositions, textures, and structures of carbonized wood fragments were studied. Scanning of individual cross sections of lignite fragments has revealed a regular distribution of germanium and impurity elements. Consistent patterns of the formation of Ge-containing lignites have been established, as well as the processes of their posthydrothermal transformation, which led to the impoverishment of the primary contents of the valuable component and to the input of a number of impurity elements. The latter formed rims over the lignite fragments and microveinlets with sulfide mineralization. The hypothesis has been put forward that germanium mineralization formed in lignites of the Kas basin, in particular, the Serchanskoe deposit.

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Rare Earth Elements in the Lignite Ash Determination Method Development

Abstract: The possibility of using the lignite ash from central watershed of the Yenisei river as a new

Cited by 3 publications

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Oxygen Impurity in Germanium Single Crystals Determination by Infrared Spectrometry

Oxygen Impurity in Germanium Single Crystals Determination by Infrared Spectrometry

Influence of Sample Pretreatment on the Analysis of High Contents of Rare-Earth and High Field Strength Elements in Geological Samples by ICP-AES and ICP-MS (Case Study of the Tomtor Deposit)

Geologic and Geochemical Features of Cretaceous Ge-Bearing Lignites in the Yenisei Middle Reaches

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