Xenotime-(Gd)

Xenotime-(Gd)
General
CategoryXenotime group
Formula
(repeating unit)		Gd(PO4)
IMA symbolXtm-Gd[1]
Strunz classification8.AD.35
Crystal systemTetragonal
Identification
Specific gravity5.26 g/cm3 (calculated)
References[1]

Xenotime-(Gd) is the gadolinium endpoint of Xenotime with the ideal formula 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).[2] The mineral species Xenotime-(Gd) was approved by the IMA in 2023,[3] 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.[4] Besides yttrium, the examined type material bore further rare earth elements such as dysprosium, samarium and terbium.[4]

See also

References

  1. ^ a b Page Xenotime-(Gd): Mineral information, data and localities on "mindat.org". Hudson Institute of Mineralogy. Retrieved 2024-12-27.
  2. ^ Ondrejka M, Uher P, Ferenc S, Milovska S, Mikus T, Molnarova A, Skoda R, Kopacik R, Bacik P (2023-04-03). "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)". American Mineralogist. 108 (4): 754–768. doi:10.2138/am-2022-8418. Retrieved 2025-01-01.
  3. ^ Olds TA, Emproto C (2024-03-27). "New Mineral Names". American Mineralogist. 109 (4): 799–802. Bibcode:2024MinM...88..613O. doi:10.2138/am-2024-NMN10949. Retrieved 2024-12-27.
  4. ^ a b Ondrejka M, Bacik P, Majzlan J, Uher P, Ferenc S, Mikus T, Stevko M, Caplovicova M, Milovska S, Molnarova A, Rössler C, Matthes C (2024-11-14). "Xenotime-(Gd), a new Gd-dominant mineral of the xenotime group from the Zimná Voda REE–U–Au quartz vein, Prakovce, Western Carpathians, Slovakia". Mineralogical Magazine. 88 (5): 613–622. Bibcode:2024MinM...88..613O. doi:10.1180/mgm.2024.62. Retrieved 2024-12-27.
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