Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy
The result's identifiers
Result code in 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>
Alternative codes found
RIV/00216224:14310/19:00110422
Result on the web
<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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Alternative languages
Result language
angličtina
Original language name
Bendadaite from Krásno near Horní Slavkov (Czech Republic), description and Raman spectroscopy
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
10504 - Mineralogy
Result continuities
Project
<a href="/en/project/GA17-09161S" target="_blank" >GA17-09161S: Crystal structures, chemistry and stability of arsenate and sulfate minerals</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Bulletin Mineralogie Petrologie
ISSN
2570-7337
e-ISSN
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Volume of the periodical
27
Issue of the periodical within the volume
1
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
9
Pages from-to
63-71
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-85073282784