Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processing

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Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processing. / Al-Ali, Safaa; Wall, Frances; Sheridan, Richard; Pickles, Joe; Pascoe, Richard.

In: Minerals Engineering, Vol. 131, 15.01.2019, p. 392-397.

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Al-Ali, Safaa ; Wall, Frances ; Sheridan, Richard ; Pickles, Joe ; Pascoe, Richard. / Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processing. In: Minerals Engineering. 2019 ; Vol. 131. pp. 392-397.

Bibtex

@article{aece98f387d74f0095b6133f075d5b76,
title = "Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processing",
abstract = "Rare earth elements (REE) are considered as critical metals for electronics and green technology. The REE fluorcarbonates are one of the main REE ore minerals, common in many different types of REE deposit and yet some of their fundamental properties have still not been determined. This study measured the magnetic properties of pure REE fluorcarbonate single crystal minerals using a vibrating sample magnetometer (VSM) and determined their elemental compositions using electron probe microanalysis (EPMA). The results provide the first measurements of the magnetic behaviour and susceptibility of REE fluorcarbonates other than bastn{\"a}site-(Ce). The magnetic susceptibility of REE fluorcarbonates varies systematically from one mineral to another and is highly dependent on the mineral chemistry. It is positive (paramagnetic) for bastn{\"a}site-(Ce) and gradually decreases as the amount of Ca increases in parisite-(Ce), becoming negative (diamagnetic) for the Ca-rich member of the series, r{\"o}ntgenite. Synchysite-(Ce) is difficult to measure, generate good signal and acquire accurate readings because it practically always occurs as <5 mg crystals. Its magnetic susceptibility in samples from a REE ore deposit was experimentally determined by magnetic separation and checked by an associated study using a SQUID magnetometer, synchysite-(Ce) behaved as a diamagnetic mineral. This can be explained by the increase of Ca content and decrease of REE content, in addition to the variations in the layered structure common to the REE fluorcarbonate series minerals. Given the wide range of magnetic susceptibility of REE fluorcarbonates, it is important that the mineralogy is determined carefully before setting up a mineral processing flow sheet.",
keywords = "Magnetic properties, Rare Earth Minerals, bastnasite, parisite, rontgenite, synchysite",
author = "Safaa Al-Ali and Frances Wall and Richard Sheridan and Joe Pickles and Richard Pascoe",
year = "2019",
month = jan,
day = "15",
doi = "10.1016/j.mineng.2018.11.042",
language = "English",
volume = "131",
pages = "392--397",
journal = "Minerals Engineering",
issn = "0892-6875",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processing

AU - Al-Ali, Safaa

AU - Wall, Frances

AU - Sheridan, Richard

AU - Pickles, Joe

AU - Pascoe, Richard

PY - 2019/1/15

Y1 - 2019/1/15

N2 - Rare earth elements (REE) are considered as critical metals for electronics and green technology. The REE fluorcarbonates are one of the main REE ore minerals, common in many different types of REE deposit and yet some of their fundamental properties have still not been determined. This study measured the magnetic properties of pure REE fluorcarbonate single crystal minerals using a vibrating sample magnetometer (VSM) and determined their elemental compositions using electron probe microanalysis (EPMA). The results provide the first measurements of the magnetic behaviour and susceptibility of REE fluorcarbonates other than bastnäsite-(Ce). The magnetic susceptibility of REE fluorcarbonates varies systematically from one mineral to another and is highly dependent on the mineral chemistry. It is positive (paramagnetic) for bastnäsite-(Ce) and gradually decreases as the amount of Ca increases in parisite-(Ce), becoming negative (diamagnetic) for the Ca-rich member of the series, röntgenite. Synchysite-(Ce) is difficult to measure, generate good signal and acquire accurate readings because it practically always occurs as <5 mg crystals. Its magnetic susceptibility in samples from a REE ore deposit was experimentally determined by magnetic separation and checked by an associated study using a SQUID magnetometer, synchysite-(Ce) behaved as a diamagnetic mineral. This can be explained by the increase of Ca content and decrease of REE content, in addition to the variations in the layered structure common to the REE fluorcarbonate series minerals. Given the wide range of magnetic susceptibility of REE fluorcarbonates, it is important that the mineralogy is determined carefully before setting up a mineral processing flow sheet.

AB - Rare earth elements (REE) are considered as critical metals for electronics and green technology. The REE fluorcarbonates are one of the main REE ore minerals, common in many different types of REE deposit and yet some of their fundamental properties have still not been determined. This study measured the magnetic properties of pure REE fluorcarbonate single crystal minerals using a vibrating sample magnetometer (VSM) and determined their elemental compositions using electron probe microanalysis (EPMA). The results provide the first measurements of the magnetic behaviour and susceptibility of REE fluorcarbonates other than bastnäsite-(Ce). The magnetic susceptibility of REE fluorcarbonates varies systematically from one mineral to another and is highly dependent on the mineral chemistry. It is positive (paramagnetic) for bastnäsite-(Ce) and gradually decreases as the amount of Ca increases in parisite-(Ce), becoming negative (diamagnetic) for the Ca-rich member of the series, röntgenite. Synchysite-(Ce) is difficult to measure, generate good signal and acquire accurate readings because it practically always occurs as <5 mg crystals. Its magnetic susceptibility in samples from a REE ore deposit was experimentally determined by magnetic separation and checked by an associated study using a SQUID magnetometer, synchysite-(Ce) behaved as a diamagnetic mineral. This can be explained by the increase of Ca content and decrease of REE content, in addition to the variations in the layered structure common to the REE fluorcarbonate series minerals. Given the wide range of magnetic susceptibility of REE fluorcarbonates, it is important that the mineralogy is determined carefully before setting up a mineral processing flow sheet.

KW - Magnetic properties

KW - Rare Earth Minerals

KW - bastnasite

KW - parisite

KW - rontgenite

KW - synchysite

UR - http://www.scopus.com/inward/record.url?scp=85057334537&partnerID=8YFLogxK

U2 - 10.1016/j.mineng.2018.11.042

DO - 10.1016/j.mineng.2018.11.042

M3 - Article

VL - 131

SP - 392

EP - 397

JO - Minerals Engineering

JF - Minerals Engineering

SN - 0892-6875

ER -