Re-investigation of 'minasgeraisite-(Y)' from the Jaguaracu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals
The result's identifiers
Result code in 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>
Alternative codes found
RIV/00216224:14310/23:00131285
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Re-investigation of 'minasgeraisite-(Y)' from the Jaguaracu pegmatite, Brazil and high-temperature crystal chemistry of gadolinite-supergroup minerals
Original language description
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.
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
10406 - Analytical chemistry
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MINERALOGICAL MAGAZINE
ISSN
0026-461X
e-ISSN
1471-8022
Volume of the periodical
3
Issue of the periodical within the volume
87
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
470-479
UT code for WoS article
001007730200001
EID of the result in the Scopus database
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