Re-investigation of 'minasgeraisite-(Y)' from the Jaguaracu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F23%3APU150436" target="_blank" >RIV/00216305:26310/23:PU150436 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/23:00131285

Výsledek na webu

<a href="https://pubs.geoscienceworld.org/minmag/article-abstract/87/3/470/624477/Re-investigation-of-minasgeraisite-Y-from-the" target="_blank" >https://pubs.geoscienceworld.org/minmag/article-abstract/87/3/470/624477/Re-investigation-of-minasgeraisite-Y-from-the</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2023.19" target="_blank" >10.1180/mgm.2023.19</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Re-investigation of 'minasgeraisite-(Y)' from the Jaguaracu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals

Popis výsledku v původním jazyce

The chemical composition (including B, Be and Li), the Raman spectrum and the crystal-structure evolution (at the temperature range 27-1000 degrees C) of a Mn-bearing, Bi-rich gadolinite-subgroup mineral from the Jaguaracu Pegmatite, Brazil (type-locality of minasgeraisite-(Y)) was studied. Elemental mapping revealed that the crystal investigated has complex chemical zonation with various Bi (similar to 8-24 wt.% Bi2O3), Ca (similar to 8-10 wt.% CaO) and Y (similar to 11-17 wt.% Y2O3) content. The sample investigated has all the specific features of the chemical composition of minasgeraisite-(Y), except Ca excess and, thus, should be considered as hingganite-(Y). The Raman spectrum of the sample under study has bands at 140, 179, 243, 350, 446, 519, 559, 625, 902, 973, 3224, 3353, 3532 and 3763 cm(-1), and is similar to that of hingganite-(Y) /-(Nd). Crystal-structure refinement confirmed that the crystal in question should be considered as hingganite-(Y) and is in line with the previously obtained data on gadolinite-subgroup minerals from the Jaguaracu Pegmatite. High-temperature single-crystal X-ray diffraction studies revealed that the mineral starts to decompose above 800 degrees C. We can conclude that beryllosilicates are most stable at high-temperature conditions within the gadolinite supergroup and that species with a higher M-site occupancy have higher stability upon heating.

Název v anglickém jazyce

Re-investigation of 'minasgeraisite-(Y)' from the Jaguaracu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals

Popis výsledku anglicky

The chemical composition (including B, Be and Li), the Raman spectrum and the crystal-structure evolution (at the temperature range 27-1000 degrees C) of a Mn-bearing, Bi-rich gadolinite-subgroup mineral from the Jaguaracu Pegmatite, Brazil (type-locality of minasgeraisite-(Y)) was studied. Elemental mapping revealed that the crystal investigated has complex chemical zonation with various Bi (similar to 8-24 wt.% Bi2O3), Ca (similar to 8-10 wt.% CaO) and Y (similar to 11-17 wt.% Y2O3) content. The sample investigated has all the specific features of the chemical composition of minasgeraisite-(Y), except Ca excess and, thus, should be considered as hingganite-(Y). The Raman spectrum of the sample under study has bands at 140, 179, 243, 350, 446, 519, 559, 625, 902, 973, 3224, 3353, 3532 and 3763 cm(-1), and is similar to that of hingganite-(Y) /-(Nd). Crystal-structure refinement confirmed that the crystal in question should be considered as hingganite-(Y) and is in line with the previously obtained data on gadolinite-subgroup minerals from the Jaguaracu Pegmatite. High-temperature single-crystal X-ray diffraction studies revealed that the mineral starts to decompose above 800 degrees C. We can conclude that beryllosilicates are most stable at high-temperature conditions within the gadolinite supergroup and that species with a higher M-site occupancy have higher stability upon heating.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

MINERALOGICAL MAGAZINE

ISSN

0026-461X

e-ISSN

1471-8022

Svazek periodika

3

Číslo periodika v rámci svazku

87

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

470-479

Kód UT WoS článku

001007730200001

EID výsledku v databázi Scopus

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