Hyalite Opal from Erongo, Namibia, Showing Green Daylight
Fluorescence

J 2022

Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence

HANUS, Radek; Kamil SOBEK; Kamila JOHNOVÁ; Tomáš TROJEK; Ján ŠTUBŇA et. al.

Základní údaje

Originální název

Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence

Autoři

HANUS, Radek; Kamil SOBEK; Kamila JOHNOVÁ; Tomáš TROJEK; Ján ŠTUBŇA; Tomáš HANUS a Kamila JUNGMANNOVÁ

Vydání

Journal of Gemmology, Gemmological Association of Great Britain, 2022, 1355-4565

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10505 Geology

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.200

Kód RIV

RIV/00216224:14310/22:00126040

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.15506/JoG.2022.38.2.172

UT WoS

000859290900022

EID Scopus

2-s2.0-85144991239

Klíčová slova anglicky

Hyalite; Uranyl ion; Raman spectroscopy; Gamma spectroscopy; Photoluminescence

Štítky

14315010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 1. 2023 10:39, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Rare hyalite opal showing green daylight fluorescence was discovered in the Erongo region, Namibia, sometime prior to 2000. Raman spectroscopy confirms this hyalite to be opal-A, and the most interesting feature of the Raman spectra are bands associated with the hydroxyl-stretching regions in the mineral’s structure. A doublet at 3602/3665 cm–1 appears to be unique to opal from this locality and may be due to the vibration of water in an unusual structural-binding arrangement. Trace amounts of the uranyl molecule (UO2)2+ are responsible for the luminescence, which is unevenly distributed according to the opal’s botryoidal structure. Measured radioactivity values are similar to those reported for other daylight-fluorescing opals (e.g. from Mexico), and are well below the global average terrestrial gamma dose rate.

Návaznosti

EF19_073/0016943, projekt VaV

Název: Interní grantová agentura Masarykovy univerzity

Citovat

HANUS, Radek; Kamil SOBEK; Kamila JOHNOVÁ; Tomáš TROJEK; Ján ŠTUBŇA; Tomáš HANUS a Kamila JUNGMANNOVÁ. Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence. Journal of Gemmology. Gemmological Association of Great Britain, 2022, roč. 38, č. 2, s. 172-182. ISSN 1355-4565. Dostupné z: https://doi.org/10.15506/JoG.2022.38.2.172.

@article{1860608,
   author = {Hanus, Radek and Sobek, Kamil and Johnová, Kamila and Trojek, Tomáš and Štubňa, Ján and Hanus, Tomáš and Jungmannová, Kamila},
   article_number = {2},
   doi = {https://doi.org/10.15506/JoG.2022.38.2.172},
   keywords = {Hyalite; Uranyl ion; Raman spectroscopy; Gamma spectroscopy; Photoluminescence},
   language = {eng},
   issn = {1355-4565},
   journal = {Journal of Gemmology},
   title = {Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence},
   url = {https://gem-a.com/jog-volume-38-issue-2-2022},
   volume = {38},
   year = {2022}
}

TY  - JOUR
ID  - 1860608
AU  - Hanus, Radek - Sobek, Kamil - Johnová, Kamila - Trojek, Tomáš - Štubňa, Ján - Hanus, Tomáš - Jungmannová, Kamila
PY  - 2022
TI  - Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence
JF  - Journal of Gemmology
VL  - 38
IS  - 2
SP  - 172-182
EP  - 172-182
PB  - Gemmological Association of Great Britain
SN  - 13554565
KW  - Hyalite
KW  - Uranyl ion
KW  - Raman spectroscopy
KW  - Gamma spectroscopy
KW  - Photoluminescence
UR  - https://gem-a.com/jog-volume-38-issue-2-2022
N2  - Rare hyalite opal showing green daylight fluorescence was discovered in the Erongo region, Namibia, sometime prior to 2000. Raman spectroscopy confirms this hyalite to be opal-A, and the most interesting feature of the Raman spectra are bands associated with the hydroxyl-stretching regions in the mineral’s structure. A doublet at 3602/3665 cm–1 appears to be unique to opal from this locality and may be due to the vibration of water in an unusual structural-binding arrangement. Trace amounts of the uranyl molecule (UO2)2+ are responsible for the luminescence, which is unevenly distributed according to the opal’s botryoidal structure. Measured radioactivity values are similar to those reported for other daylight-fluorescing opals (e.g. from Mexico), and are well below the global average terrestrial gamma dose rate.
ER  -

HANUS, Radek; Kamil SOBEK; Kamila JOHNOVÁ; Tomáš TROJEK; Ján ŠTUBŇA; Tomáš HANUS a Kamila JUNGMANNOVÁ. Hyalite Opal from Erongo, Namibia, Showing Green Daylight Fluorescence. \textit{Journal of Gemmology}. Gemmological Association of Great Britain, 2022, roč.~38, č.~2, s.~172-182. ISSN~1355-4565. Dostupné z: https://doi.org/10.15506/JoG.2022.38.2.172.

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