Dacostaite, K(Mg2Al)[Mg(H2O)6]2(AsO4)2F6.2H2O, a new fluoride-arsenate mineral from the Cetine di Cotorniano mine (Tuscany, Italy)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F25%3A10136967" target="_blank" >RIV/00023272:_____/25:10136967 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00140751

Výsledek na webu

<a href="https://ejm.copernicus.org/articles/37/39/2025/ejm-37-39-2025.pdf" target="_blank" >https://ejm.copernicus.org/articles/37/39/2025/ejm-37-39-2025.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/ejm-37-39-2025" target="_blank" >10.5194/ejm-37-39-2025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dacostaite, K(Mg2Al)[Mg(H2O)6]2(AsO4)2F6.2H2O, a new fluoride-arsenate mineral from the Cetine di Cotorniano mine (Tuscany, Italy)

Popis výsledku v původním jazyce

The new mineral dacostaite, K(Mg2Al)[Mg(H2O)6]2(AsO4)2F6.2H2O, has been discovered in the Cetine di Cotorniano Mine, Chiusdino, Siena, Tuscany, Italy. It occurs as thin, colourless-to-white pseudo-hexagonal micaceous crystals up to 0.5 mm in size. The streak is white, and the lustre is silky. The cleavage is perfect on {001}. The empirical formula of dacostaite, based on (As + P) = 2 atoms per formula unit, is (K0.56Ca0.04Na0.03square0.37)Σ1.00(Al1.54Mg1.38Cu0.03Zn0.03)Σ2.98[Mg(H2O)6]2[(As0.99P0.01O4]2[F4.46(OH)(1.46)O0.08](Σ6.00).2H2O (Z=2). Dacostaite is monoclinic, with a space group of C2/m and a=12.474(5), b=7.198(3), c=13.724(6) Å, beta=99.518(13)degrees, and V=1215.3(8) Å3. The crystal structure was solved using single-crystal X-ray diffraction data and refined to R1=0.0927 for 1022 unique reflections with F-o&gt;4 sigma(F-o). The crystal structure of dacostaite can be described as formed by heteropolyhedral {001} layers and isolated Mg(H2O)6 groups connected by H bonds. In the type material, dacostaite is associated with quartz, sulfur, gypsum, and a pharmacosiderite-like mineral in a small cavity of silicified limestone. Its genesis is related to the activity of oxidized (Al,F)-rich fluids during the late-stage evolution of the Sb ore deposit formerly exploited at the Cetine di Cotorniano Mine.

Název v anglickém jazyce

Dacostaite, K(Mg2Al)[Mg(H2O)6]2(AsO4)2F6.2H2O, a new fluoride-arsenate mineral from the Cetine di Cotorniano mine (Tuscany, Italy)

Popis výsledku anglicky

The new mineral dacostaite, K(Mg2Al)[Mg(H2O)6]2(AsO4)2F6.2H2O, has been discovered in the Cetine di Cotorniano Mine, Chiusdino, Siena, Tuscany, Italy. It occurs as thin, colourless-to-white pseudo-hexagonal micaceous crystals up to 0.5 mm in size. The streak is white, and the lustre is silky. The cleavage is perfect on {001}. The empirical formula of dacostaite, based on (As + P) = 2 atoms per formula unit, is (K0.56Ca0.04Na0.03square0.37)Σ1.00(Al1.54Mg1.38Cu0.03Zn0.03)Σ2.98[Mg(H2O)6]2[(As0.99P0.01O4]2[F4.46(OH)(1.46)O0.08](Σ6.00).2H2O (Z=2). Dacostaite is monoclinic, with a space group of C2/m and a=12.474(5), b=7.198(3), c=13.724(6) Å, beta=99.518(13)degrees, and V=1215.3(8) Å3. The crystal structure was solved using single-crystal X-ray diffraction data and refined to R1=0.0927 for 1022 unique reflections with F-o&gt;4 sigma(F-o). The crystal structure of dacostaite can be described as formed by heteropolyhedral {001} layers and isolated Mg(H2O)6 groups connected by H bonds. In the type material, dacostaite is associated with quartz, sulfur, gypsum, and a pharmacosiderite-like mineral in a small cavity of silicified limestone. Its genesis is related to the activity of oxidized (Al,F)-rich fluids during the late-stage evolution of the Sb ore deposit formerly exploited at the Cetine di Cotorniano Mine.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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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

European Journal of Mineralogy

ISSN

0935-1221

e-ISSN

—

Svazek periodika

37

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

39-52

Kód UT WoS článku

001400555700001

EID výsledku v databázi Scopus

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