Julgoldite-(Fe2+) and Fe-rich prehnite from pectolite veins at Koštálov quarry, Czech Republic: Mössbauer, WDS and PXRD study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F25%3A10136948" target="_blank" >RIV/00023272:_____/25:10136948 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.jgeosci.org/content/jgeosci.403_Vrtiska.pdf" target="_blank" >https://www.jgeosci.org/content/jgeosci.403_Vrtiska.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.403" target="_blank" >10.3190/jgeosci.403</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Julgoldite-(Fe2+) and Fe-rich prehnite from pectolite veins at Koštálov quarry, Czech Republic: Mössbauer, WDS and PXRD study

Popis výsledku v původním jazyce

Julgoldite-(Fe2+) and Fe-rich prehnite were found in pectolite veins filling fissures in basaltic andesite at the Košt&apos;álov quarry near Semily (Liberec region, Czech Republic). Empirical formula of julgoldite-(Fe2+) based on EPMA and Mössbauer spectroscopy considering so-called intervalence electron hopping in the structure may be written as Ca2.01(Fe2+0.56Fe2.5+0.25Mg0.14)Σ0.95(Fe3+1.19Fe2.5+0.25Al0.57)Σ2.01Si3O9.94(OH)4.06. Refined unit-cell parameters for monoclinic space group A2/m are a = 8.927(3) Å, b = 6.080(2) Å, c = 19.428(7) Å, β = 97.59(4)o, V = 1045.2(8) Å3. Prehnite with the empirical formula Ca2.01(Al0.53Fe0.45)Σ0.98(AlSi3O10)(OH)1.93F0.02 is located approximately in the middle of the prehnite-ferriprehnite series. Mössbauer 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) Å, b = 5.502(2) Å, c = 4.672(2) Å, V = 478.5(2) Å3. Pectolite is the main mineral in the mineral assemblage. Its unit-cell parameters refined from powder X-ray diffraction are a = 7.9848(14) Å, b = 7.0391(19) Å, c = 7.0243(11) Å, α = 90.53(2)o, β = 95.19(1)o, γ = 102.48(2)o and V 383.7(1) Å3 . Chemical composition of pectolite corresponds to ideal stoichiometry and give the empirical formula Na1.00(Ca2.02Mn0.01Fe0.01)Σ2.04Si3O8(OH1.04)F0.02. 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.

Název v anglickém jazyce

Julgoldite-(Fe2+) and Fe-rich prehnite from pectolite veins at Koštálov quarry, Czech Republic: Mössbauer, WDS and PXRD study

Popis výsledku anglicky

Julgoldite-(Fe2+) and Fe-rich prehnite were found in pectolite veins filling fissures in basaltic andesite at the Košt&apos;álov quarry near Semily (Liberec region, Czech Republic). Empirical formula of julgoldite-(Fe2+) based on EPMA and Mössbauer spectroscopy considering so-called intervalence electron hopping in the structure may be written as Ca2.01(Fe2+0.56Fe2.5+0.25Mg0.14)Σ0.95(Fe3+1.19Fe2.5+0.25Al0.57)Σ2.01Si3O9.94(OH)4.06. Refined unit-cell parameters for monoclinic space group A2/m are a = 8.927(3) Å, b = 6.080(2) Å, c = 19.428(7) Å, β = 97.59(4)o, V = 1045.2(8) Å3. Prehnite with the empirical formula Ca2.01(Al0.53Fe0.45)Σ0.98(AlSi3O10)(OH)1.93F0.02 is located approximately in the middle of the prehnite-ferriprehnite series. Mössbauer 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) Å, b = 5.502(2) Å, c = 4.672(2) Å, V = 478.5(2) Å3. Pectolite is the main mineral in the mineral assemblage. Its unit-cell parameters refined from powder X-ray diffraction are a = 7.9848(14) Å, b = 7.0391(19) Å, c = 7.0243(11) Å, α = 90.53(2)o, β = 95.19(1)o, γ = 102.48(2)o and V 383.7(1) Å3 . Chemical composition of pectolite corresponds to ideal stoichiometry and give the empirical formula Na1.00(Ca2.02Mn0.01Fe0.01)Σ2.04Si3O8(OH1.04)F0.02. 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Geosciences

ISSN

1803-1943

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

43-51

Kód UT WoS článku

999

EID výsledku v databázi Scopus

—