Xenotime-(Gd)
{{Short description|Mineral}}
{{Infobox mineral
| name = Xenotime-(Gd)
| category = Xenotime group
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| image =
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| formula = {{chem2|Gd(PO4)}}
| strunz = 8.AD.35
| color =
| system = Tetragonal
| mohs =
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| gravity = 5.26 g/cm3 (calculated)
| other =
| references = Page Xenotime-(Gd): Mineral information, data and localities on {{cite web | url=https://www.mindat.org/min-471000.html | title=mindat.org | publisher=Hudson Institute of Mineralogy | access-date=2024-12-27}}
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Xenotime-(Gd) is the gadolinium endpoint of Xenotime with the ideal formula {{chem2|Gd(PO4)}}. It is one of the few known gadolinium-dominant rare earth minerals.
Discovery
Xenotime deposits rich in gadolinium were reported in 2023 from the Slovak Ore Mountains along with other rare earth minerals enriched in elements classified as medium rare earth elements (MREE).{{cite journal |vauthors=Ondrejka M, Uher P, Ferenc S, Milovska S, Mikus T, Molnarova A, Skoda R, Kopacik R, Bacik P
|date=2023-04-03 |title=Gadolinium-dominant monazite and xenotime: Selective hydrothermal enrichment of middle REE during low-temperature alteration of uraninite, brannerite, and fluorapatite (the Zimná Voda REE-U-Au quartz vein, Western Carpathians, Slovakia) |url=https://pubs.geoscienceworld.org/msa/ammin/article-abstract/108/4/754/621451/Gadolinium-dominant-monazite-and-xenotime |journal=American Mineralogist |volume=108 |issue=4 |pages=754-768 |doi=10.2138/am-2022-8418 |pmc= |pmid= |bibcode= |access-date=2025-01-01|url-access=subscription }} The mineral species Xenotime-(Gd) was approved by the IMA in 2023,{{cite journal |vauthors=Olds TA, Emproto C |date=2024-03-27 |title=New Mineral Names |url=https://www.degruyter.com/document/doi/10.2138/am-2024-NMN10949/html |journal=American Mineralogist |volume=109 |issue=4 |pages=799-802 |doi=10.2138/am-2024-NMN10949 |pmc= |pmid= |bibcode=2024MinM...88..613O |access-date=2024-12-27}} a description of the mineral was published in 2024 based on crystals found within gadolinium rich xenotime-(Y) sampled at the Zimná Voda quartz vein near Prakovce.{{cite journal |vauthors=Ondrejka M, Bacik P, Majzlan J, Uher P, Ferenc S, Mikus T, Stevko M, Caplovicova M, Milovska S, Molnarova A, Rössler C, Matthes C |date=2024-11-14 |title=Xenotime-(Gd), a new Gd-dominant mineral of the xenotime group from the Zimná Voda REE–U–Au quartz vein, Prakovce, Western Carpathians, Slovakia |url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/xenotimegd-a-new-gddominant-mineral-of-the-xenotime-group-from-the-zimna-voda-reeuau-quartz-vein-prakovce-western-carpathians-slovakia/BAE272E641CD070077D393E07047A620 |journal=Mineralogical Magazine |volume=88 |issue=5 |pages=613–622 |doi=10.1180/mgm.2024.62 |pmc= |pmid= |bibcode=2024MinM...88..613O |access-date=2024-12-27}} Besides yttrium, the examined type material bore further rare earth elements such as dysprosium, samarium and terbium.
See also
References
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