Julgoldite-(Fe2+) and Fe-rich prehnite from pectolite veins at Kostalov quarry, Czech Republic: Mössbauer, WDS and PXRD study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73633678" target="_blank" >RIV/61989592:15640/25:73633678 - isvavai.cz</a>
Result on the web
<a href="https://www.jgeosci.org/detail/jgeosci.403" target="_blank" >https://www.jgeosci.org/detail/jgeosci.403</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3190/jgeosci.403" target="_blank" >10.3190/jgeosci.403</a>
Alternative languages
Result language
angličtina
Original language name
Julgoldite-(Fe2+) and Fe-rich prehnite from pectolite veins at Kostalov quarry, Czech Republic: Mössbauer, WDS and PXRD study
Original language description
Julgoldite-(Fe2+) and Fe-rich prehnite were found in pectolite veins filling fissures in basaltic andesite at the Kost'alov quarry near Semily (Liberec region, Czech Republic). Empirical formula of julgoldite-(Fe2+) based on EPMA and M & ouml;ssbauer spectroscopy considering so-called intervalence electron hopping in the structure may be written as Ca-2.01(Fe0.562+Fe0.252.5+Mg0.14)(Sigma 0.95)(Fe1.193+Fe0.252.5+Al0.57)(Sigma 2.01)Si3O9.94(OH)(4.06). Refined unit-cell parameters for monoclinic space group A2/m are a = 8.927(3) & Aring;, b = 6.080(2) & Aring;, c = 19.428(7) & Aring;, beta = 97.59(4)degrees, V = 1045.2(8) & Aring;(3). Prehnite with the empirical formula Ca-2.01(Al0.53Fe0.45)(Sigma 0.98)(AlSi3O10)(OH)(1.93)F-0.02 is located approximately in the middle of the prehnite-ferriprehnite series. M & ouml;ssbauer spectroscopy indicated that all Fe is present in the trivalent form. The increased Fe content is also reflected in this unit-cell: a = 18.617(5) & Aring;, b = 5.502(2) & Aring;, c = 4.672(2) & Aring;, V = 478.5(2) & Aring;(3). Pectolite is the main mineral in the mineral assemblage. Its unit-cell parameters refined from powder X-ray diffraction are a = 7.9848(14) & Aring;, b = 7.0391(19) & Aring;, c = 7.0243(11) & Aring;, alpha = 90.53(2)degrees, beta = 95.19(1)degrees, gamma = 102.48(2)degrees and V 383.7(1) & Aring;(3). Chemical composition of pectolite corresponds to ideal stoichiometry and give the empirical formula Na-1.00(Ca2.02Mn0.01Fe0.01)(Sigma 2.04)Si3O8(OH1.04)F-0.02. Other minor minerals of the association are hematite, pyrite and the youngest calcite. The source of mineralization of the circulating fluids can be found in alteration of rock components (feldspars, olivine, glass); however, external input from the surrounding calcareous sediments cannot be excluded.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10504 - Mineralogy
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geosciences
ISSN
1802-6222
e-ISSN
1803-1943
Volume of the periodical
70
Issue of the periodical within the volume
1
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
9
Pages from-to
43-51
UT code for WoS article
001614643400001
EID of the result in the Scopus database
2-s2.0-105020908388