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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F19%3A10134426" target="_blank" >RIV/00023272:_____/19:10134426 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/19:00110422

Výsledek na webu

<a href="http://www.bullmineral.cz/paper/197" target="_blank" >http://www.bullmineral.cz/paper/197</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 μm 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) Å, β 94.15(2)o, V 543.8(1) Å3 (sample NM) and a 10.175(2), b 9.682(2), c 5.532(1) Å, β 94.13(2)o, V 543.6(1) Å3 (sample JT). The chemical composition of bendadaite agrees with general stoichiometry of the arthurite group minerals and corresponds to the following empirical formulae: (Fe0.52Zn0.25Cu0.02Mg0.02 □0.19)Σ1.00(Fe3+1.80Al0.20)Σ2.00 [(AsO4)1.66(PO4)0.34]Σ2.00(OH)2.4H2O (sample NM) and (Fe0.63Zn0.26□ 0.11)Σ1.00 (Fe3+1.87Al0.13)Σ2.00 [(AsO4)1.62(PO4)0.38]Σ2.00(OH)2.4H2O (sample JT). The Raman spectra of both studied bendadaite samples 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 μm 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) Å, β 94.15(2)o, V 543.8(1) Å3 (sample NM) and a 10.175(2), b 9.682(2), c 5.532(1) Å, β 94.13(2)o, V 543.6(1) Å3 (sample JT). The chemical composition of bendadaite agrees with general stoichiometry of the arthurite group minerals and corresponds to the following empirical formulae: (Fe0.52Zn0.25Cu0.02Mg0.02 □0.19)Σ1.00(Fe3+1.80Al0.20)Σ2.00 [(AsO4)1.66(PO4)0.34]Σ2.00(OH)2.4H2O (sample NM) and (Fe0.63Zn0.26□ 0.11)Σ1.00 (Fe3+1.87Al0.13)Σ2.00 [(AsO4)1.62(PO4)0.38]Σ2.00(OH)2.4H2O (sample JT). The Raman spectra of both studied bendadaite samples 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.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

10504 - Mineralogy

Projekt

<a href="/cs/project/GA17-09161S" target="_blank" >GA17-09161S: Krystalové struktury, chemismus a stabilita arseničnanových a síranových minerálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Bulletin Mineralogie Petrologie

ISSN

2570-7337

e-ISSN

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Svazek periodika

27

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

63-71

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85073282784