The REE-Induced Absorption and Luminescence in Yellow Gem-Quality Durango-Type Hydroxylapatite from Muranska Dlha Luka, Slovakia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00117749" target="_blank" >RIV/00216224:14310/20:00117749 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3390/min10111001" target="_blank" >https://doi.org/10.3390/min10111001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min10111001" target="_blank" >10.3390/min10111001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The REE-Induced Absorption and Luminescence in Yellow Gem-Quality Durango-Type Hydroxylapatite from Muranska Dlha Luka, Slovakia

Popis výsledku v původním jazyce

In talc-magnesite veins in serpentinite near Muranska Dlha Luka (MDL), Slovakia, yellow euhedral to subhedral crystals apatite of a gem quality occur. It has a composition of hydroxylapatite with F- varying between 0.29 and 0.34 apfu, Cl- in range of 0.02-0.05 apfu and calculated OH- content between 0.62-0.68 apfu. Moreover, [CO3](2-) molecules were identified by FTIR and Raman spectroscopy. MDL apatite contains only up to 0.003 apfu As5+ and Si4+ substituting for P5+; Ca is substituted by small amount of Na, Fe2+, Mn2+ (all up to 0.006 apfu), and Rare Earth Elements (REE-in total up to 0.017 apfu). Compared to trace-element composition of similar apatites from Durango, Mexico, the REE content in MDL apatite is around ten times lower with Nd &gt; Ce &gt;&gt; La, its chondrite-normalized REE pattern has almost a horizontal slope and larger negative Eu anomaly. The MDL apatite is richer in Mn, Pb and Li, but poorer in As, V, Th and U. The concentrations of Sr and Y are similar. In the optical absorption spectra, the most prominent bands are at 585-590 nm (Nd3+) and between 600 and 800 nm (Mn2+, Ce3+-SiO3- photochromic center and Nd3+). The photoluminescence spectrum of MDL apatite shows bands between 550 and 620 nm (Dy3+, Sm3+, Pr3+ and also Mn2+) which likely enhance its yellow color. MDL hydroxylapatite likely formed from fluids derived from granitic rocks as evidenced by the chondrite-normalized REE patterns, Li, Mn and Y concentrations. The Sr content reflects the host-rock serpentinite composition. Fluids for its crystallization were likely derived from Muran complex orthogneisses by the Alpine deformation and recrystallization in greenschist to lower amphibolite facies.

Název v anglickém jazyce

The REE-Induced Absorption and Luminescence in Yellow Gem-Quality Durango-Type Hydroxylapatite from Muranska Dlha Luka, Slovakia

Popis výsledku anglicky

In talc-magnesite veins in serpentinite near Muranska Dlha Luka (MDL), Slovakia, yellow euhedral to subhedral crystals apatite of a gem quality occur. It has a composition of hydroxylapatite with F- varying between 0.29 and 0.34 apfu, Cl- in range of 0.02-0.05 apfu and calculated OH- content between 0.62-0.68 apfu. Moreover, [CO3](2-) molecules were identified by FTIR and Raman spectroscopy. MDL apatite contains only up to 0.003 apfu As5+ and Si4+ substituting for P5+; Ca is substituted by small amount of Na, Fe2+, Mn2+ (all up to 0.006 apfu), and Rare Earth Elements (REE-in total up to 0.017 apfu). Compared to trace-element composition of similar apatites from Durango, Mexico, the REE content in MDL apatite is around ten times lower with Nd &gt; Ce &gt;&gt; La, its chondrite-normalized REE pattern has almost a horizontal slope and larger negative Eu anomaly. The MDL apatite is richer in Mn, Pb and Li, but poorer in As, V, Th and U. The concentrations of Sr and Y are similar. In the optical absorption spectra, the most prominent bands are at 585-590 nm (Nd3+) and between 600 and 800 nm (Mn2+, Ce3+-SiO3- photochromic center and Nd3+). The photoluminescence spectrum of MDL apatite shows bands between 550 and 620 nm (Dy3+, Sm3+, Pr3+ and also Mn2+) which likely enhance its yellow color. MDL hydroxylapatite likely formed from fluids derived from granitic rocks as evidenced by the chondrite-normalized REE patterns, Li, Mn and Y concentrations. The Sr content reflects the host-rock serpentinite composition. Fluids for its crystallization were likely derived from Muran complex orthogneisses by the Alpine deformation and recrystallization in greenschist to lower amphibolite facies.

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

2020

Kód důvěrnosti údajů

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

Název periodika

Minerals

ISSN

2075-163X

e-ISSN

2075-163X

Svazek periodika

10

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

21

Strana od-do

1-21

Kód UT WoS článku

000593160100001

EID výsledku v databázi Scopus

2-s2.0-85095949368