Bendadaite from Krásno near Horní Slavkov (Czech Republic),
description and Raman spectroscopy

J 2019

Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy

SEJKORA, Jiří; Jaromír TVRDÝ; Jiří ČEJKA; Luboš VRTIŠKA; Zdeněk DOLNÍČEK et. al.

Základní údaje

Originální název

Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy

Autoři

SEJKORA, Jiří (203 Česká republika, garant); Jaromír TVRDÝ (203 Česká republika, domácí); Jiří ČEJKA; Luboš VRTIŠKA (203 Česká republika) a Zdeněk DOLNÍČEK (203 Česká republika)

Vydání

Bulletin Mineralogie Petrologie, 2019, 2570-7337

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

Kód RIV

RIV/00216224:14310/19:00110422

Organizační jednotka

Přírodovědecká fakulta

EID Scopus

2-s2.0-85073282784

Klíčová slova anglicky

bendadaite; arthurite group; powder X-ray diffraction data; unit-cell parameters; chemical composition; Raman spectroscopy; Krásno near Horní Slavkov; Czech Republic

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 29. 1. 2020 19:20, Mgr. Luboš Vrtiška, Ph.D.

Anotace

V originále

A rare Fe2+-Fe3+ dominant arsenate of the arthurite group, bendadaite, was determined at two samples from an abandoned Huber open pit in the Krásno ore district near Horní Slavkov, Slavkovský les area (Czech Republic). Bendadaite occurs there as brownish to olive green crystalline aggregates up to 2 - 6 mm in size in cavities of quartz gangue. The aggregates are composed by elongate prismatic crystals up to 100 - 200 um in length, partly in radial arrangement. It is opaque to semi-translucent (aggregates) to translucent (thin fragments). It has vitreous to subadamantine (crystals) or greasy to dull (aggregates) lustre. Bendadaite is monoclinic, space group P21/c, with the unit-cell parameters refined from X-ray powder diffraction data: a 10.183(2), b 9.672(2), c 5.536(1) A, beta 94.15(2)°, V543.8(1) A3 (sample NM) and a 10.175(2), b 9.682(2), c 5.532(1) A, beta 94.13(2)°, V 543.6(1) A3 (sample JT). The chemical composition of bendadaite agrees with general stoichiometry of the arthurite group minerals and corresponds to the following empirical formulae: (Fe0.52Zn0.25Cu0.02Mg0.02X0.19)1.00(Fe3+1.80Al0.20)2.00 [(AsO4)1.66(PO4)0.34]2.00(OH)2·4H2O (sample NM) and (Fe0.63Zn0.26X0.11)1.00(Fe3+1.87Al0.13)2.00[(AsO4)1.62(PO4)0.38]2.00(OH)2·4H2O (sample JT). The Raman spectra of both studied bendadaite sam-ples as well as tentative assignment of observed bands are given in this paper. Origin of bendadaite from Krásno is connected to in-situ supergene weathering of primary arsenopyrite, sphalerite and phosphates and high activity of arsenate and Fe2+, Fe3+ ions in acidic supergene fluids.

Citovat

SEJKORA, Jiří; Jaromír TVRDÝ; Jiří ČEJKA; Luboš VRTIŠKA a Zdeněk DOLNÍČEK. Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy. Bulletin Mineralogie Petrologie. 2019, roč. 27, č. 1, s. 63-71. ISSN 2570-7337.

@article{1549521,
   author = {Sejkora, Jiří and Tvrdý, Jaromír and Čejka, Jiří and Vrtiška, Luboš and Dolníček, Zdeněk},
   article_number = {1},
   keywords = {bendadaite; arthurite group; powder X-ray diffraction data; unit-cell parameters; chemical composition; Raman spectroscopy; Krásno near Horní Slavkov; Czech Republic},
   language = {eng},
   issn = {2570-7337},
   journal = {Bulletin Mineralogie Petrologie},
   title = {Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy},
   url = {http://bullmineral.cz/paper/download/197/fulltext},
   volume = {27},
   year = {2019}
}

TY  - JOUR
ID  - 1549521
AU  - Sejkora, Jiří - Tvrdý, Jaromír - Čejka, Jiří - Vrtiška, Luboš - Dolníček, Zdeněk
PY  - 2019
TI  - Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy
JF  - Bulletin Mineralogie Petrologie
VL  - 27
IS  - 1
SP  - 63-71
EP  - 63-71
SN  - 25707337
KW  - bendadaite
KW  - arthurite group
KW  - powder X-ray diffraction data
KW  - unit-cell parameters
KW  - chemical composition
KW  - Raman spectroscopy
KW  - Krásno near Horní Slavkov
KW  - Czech Republic
UR  - http://bullmineral.cz/paper/download/197/fulltext
L2  - http://bullmineral.cz/paper/download/197/fulltext
N2  - A rare Fe2+-Fe3+ dominant arsenate of the arthurite group, bendadaite, was determined at two samples from an abandoned Huber open pit in the Krásno ore district near Horní Slavkov, Slavkovský les area (Czech Republic). Bendadaite occurs there as brownish to olive green crystalline aggregates up to 2 - 6 mm in size in cavities of quartz gangue. The aggregates are composed by elongate prismatic crystals up to 100 - 200 um in length, partly in radial arrangement. It is opaque to semi-translucent (aggregates) to translucent (thin fragments). It has vitreous to subadamantine (crystals) or greasy to dull (aggregates) lustre. Bendadaite is monoclinic, space group P21/c, with the unit-cell parameters refined from X-ray powder diffraction data: a 10.183(2), b 9.672(2), c 5.536(1) A, beta 94.15(2)°, V543.8(1) A3 (sample NM) and a 10.175(2), b 9.682(2), c 5.532(1) A, beta 94.13(2)°, V 543.6(1) A3 (sample JT). The chemical composition of bendadaite agrees with general stoichiometry of the arthurite group minerals and corresponds to the following empirical formulae: (Fe0.52Zn0.25Cu0.02Mg0.02X0.19)1.00(Fe3+1.80Al0.20)2.00 [(AsO4)1.66(PO4)0.34]2.00(OH)2·4H2O (sample NM) and (Fe0.63Zn0.26X0.11)1.00(Fe3+1.87Al0.13)2.00[(AsO4)1.62(PO4)0.38]2.00(OH)2·4H2O (sample JT). The Raman spectra of both studied bendadaite sam-ples as well as tentative assignment of observed bands are given in this paper. Origin of bendadaite from Krásno is connected to in-situ supergene weathering of primary arsenopyrite, sphalerite and phosphates and high activity of arsenate and Fe2+, Fe3+ ions in acidic supergene fluids.
ER  -

SEJKORA, Jiří; Jaromír TVRDÝ; Jiří ČEJKA; Luboš VRTIŠKA a Zdeněk DOLNÍČEK. Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy. \textit{Bulletin Mineralogie Petrologie}. 2019, roč.~27, č.~1, s.~63-71. ISSN~2570-7337.

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