Pertoldite, trigonal GeO2, the germanium analogue of
alpha-quartz: a new mineral from Radvanice, Czech Republic

J 2022

Pertoldite, trigonal GeO2, the germanium analogue of alpha-quartz: a new mineral from Radvanice, Czech Republic

ŽÁČEK, Vladimír; Radek ŠKODA; František LAUFEK; Jiří SEJKORA; Jakub HAIFLER et. al.

Základní údaje

Originální název

Pertoldite, trigonal GeO2, the germanium analogue of alpha-quartz: a new mineral from Radvanice, Czech Republic

Autoři

ŽÁČEK, Vladimír; Radek ŠKODA; František LAUFEK; Jiří SEJKORA a Jakub HAIFLER

Vydání

Journal of Geosciences, Praha, Česká geologická společnost, 2022, 1802-6222

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.400

Kód RIV

RIV/00216224:14310/22:00128626

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.3190/jgeosci.355

UT WoS

000891320300002

EID Scopus

2-s2.0-85142766182

Klíčová slova anglicky

pertoldite; new mineral; germanium oxide; GeO2; pyrometamorphism; Radvanice

Štítky

14315010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 3. 2023 16:03, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The new mineral pertoldite was found in a burning waste dump of abandoned Kateřina colliery at Radvanice near Trutnov, Hradec Králové Department, Czech Republic. The dump fire started spontaneously before 1980 and no anthropogenic material was deposited there. The determination of pertoldite as a natural analog of synthetic trigonal α-GeO2 is based on its chemical composition, X-ray powder diffraction data, and Raman spectroscopy. Pertoldite occurs as white to brownish aggregates resembling cotton tufts, up to 1 mm in size, composed of acicular crystals up to ~1 μm thick and up to 1 mm in length. Individual crystals are distorted, resembling textile fibers. Pertoldite was formed by direct crystallization from hot (400-500 °C) gasses containing Cl and F as transporting agents at a depth of 40-60 cm under the surface of a burning coal mine dump. It nucleated as a thin, delicate crust on a chip of siltstone together with multi-component aggregates of galena, stibnite, bismuthian antimony, greenockite, and bismuth. The ideal formula of pertoldite, GeO2, requires 100 wt. % GeO2. Germanium is partially substituted by silica (2.33-5.67 wt. % SiO2), the extent of Ge1Si-1 substitution is limited to 0.03-0.09 apfu Si, and the empirical formula ranges between (Ge0.91-0.97Si0.03-0.09)Σ1.00O2. Pertoldite is trigonal, P3121 or P3221, a = 4.980(5) Å, c = 5.644(4) Å, with V = 121.2(2) Å3 and Z = 3. The strongest reflections of the powder X-ray diffraction pattern [d (Å)/I (hkl)] are: 4.315/44(100), 3.425/100(101,011), 2.490/31(110), 2.360/41(012,102), 1.867/31(112), 1.4179/31(023,203), 1.4124/37 (122,212). The crystal structure of pertoldite is based on corner-sharing [GeO4] tetrahedra forming a three-dimensional network similar to that of α-quartz. Pertoldite is named after Zdeněk Pertold (1933-2020), professor of economic geology at the Faculty of Sciences, Charles University in Prague. The mineral and its name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (number 2021-074) and the holotype specimen is deposited in the collections in the Department of Mineralogy and Petrology, National Museum in Prague, under the catalogue number P1P 31/2021.

Citovat

ŽÁČEK, Vladimír; Radek ŠKODA; František LAUFEK; Jiří SEJKORA a Jakub HAIFLER. Pertoldite, trigonal GeO2, the germanium analogue of alpha-quartz: a new mineral from Radvanice, Czech Republic. Journal of Geosciences. Praha: Česká geologická společnost, 2022, roč. 67, č. 3, s. 229-237. ISSN 1802-6222. Dostupné z: https://doi.org/10.3190/jgeosci.355.

@article{2255079,
   author = {Žáček, Vladimír and Škoda, Radek and Laufek, František and Sejkora, Jiří and Haifler, Jakub},
   article_location = {Praha},
   article_number = {3},
   doi = {https://doi.org/10.3190/jgeosci.355},
   keywords = {pertoldite; new mineral; germanium oxide; GeO2; pyrometamorphism; Radvanice},
   language = {eng},
   issn = {1802-6222},
   journal = {Journal of Geosciences},
   title = {Pertoldite, trigonal GeO2, the germanium analogue of alpha-quartz: a new mineral from Radvanice, Czech Republic},
   url = {http://www.jgeosci.org/detail/jgeosci.355/abstract/},
   volume = {67},
   year = {2022}
}

TY  - JOUR
ID  - 2255079
AU  - Žáček, Vladimír - Škoda, Radek - Laufek, František - Sejkora, Jiří - Haifler, Jakub
PY  - 2022
TI  - Pertoldite, trigonal GeO2, the germanium analogue of alpha-quartz: a new mineral from Radvanice, Czech Republic
JF  - Journal of Geosciences
VL  - 67
IS  - 3
SP  - 229-237
EP  - 229-237
PB  - Česká geologická společnost
SN  - 18026222
KW  - pertoldite
KW  - new mineral
KW  - germanium oxide
KW  - GeO2
KW  - pyrometamorphism
KW  - Radvanice
UR  - http://www.jgeosci.org/detail/jgeosci.355/abstract/
N2  - The new mineral pertoldite was found in a burning waste dump of abandoned Kateřina colliery at Radvanice near Trutnov, Hradec Králové Department, Czech Republic. The dump fire started spontaneously before 1980 and no anthropogenic material was deposited there. The determination of pertoldite as a natural analog of synthetic trigonal α-GeO2 is based on its chemical composition, X-ray powder diffraction data, and Raman spectroscopy. Pertoldite occurs as white to brownish aggregates resembling cotton tufts, up to 1 mm in size, composed of acicular crystals up to ~1 μm thick and up to 1 mm in length. Individual crystals are distorted, resembling textile fibers. Pertoldite was formed by direct crystallization from hot (400-500 °C) gasses containing Cl and F as transporting agents at a depth of 40-60 cm under the surface of a burning coal mine dump. It nucleated as a thin, delicate crust on a chip of siltstone together with multi-component aggregates of galena, stibnite, bismuthian antimony, greenockite, and bismuth. The ideal formula of pertoldite, GeO2, requires 100 wt. % GeO2. Germanium is partially substituted by silica (2.33-5.67 wt. % SiO2), the extent of Ge1Si-1 substitution is limited to 0.03-0.09 apfu Si, and the empirical formula ranges between (Ge0.91-0.97Si0.03-0.09)Σ1.00O2. Pertoldite is trigonal, P3121 or P3221, a = 4.980(5) Å, c = 5.644(4) Å, with V = 121.2(2) Å3 and Z = 3. The strongest reflections of the powder X-ray diffraction pattern [d (Å)/I (hkl)] are: 4.315/44(100), 3.425/100(101,011), 2.490/31(110), 2.360/41(012,102), 1.867/31(112), 1.4179/31(023,203), 1.4124/37 (122,212). The crystal structure of pertoldite is based on corner-sharing [GeO4] tetrahedra forming a three-dimensional network similar to that of α-quartz. Pertoldite is named after Zdeněk Pertold (1933-2020), professor of economic geology at the Faculty of Sciences, Charles University in Prague. The mineral and its name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (number 2021-074) and the holotype specimen is deposited in the collections in the Department of Mineralogy and Petrology, National Museum in Prague, under the catalogue number P1P 31/2021.
ER  -

ŽÁČEK, Vladimír; Radek ŠKODA; František LAUFEK; Jiří SEJKORA a Jakub HAIFLER. Pertoldite, trigonal GeO2, the germanium analogue of alpha-quartz: a new mineral from Radvanice, Czech Republic. \textit{Journal of Geosciences}. Praha: Česká geologická společnost, 2022, roč.~67, č.~3, s.~229-237. ISSN~1802-6222. Dostupné z: https://doi.org/10.3190/jgeosci.355.

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