Dysprosium(III) fluoride
3D model (JSmol)
ECHA InfoCard 100.033.615 Edit this at Wikidata
EC Number
  • 236-992-9
  • InChI=1S/Dy.3FH/h;3*1H/q+3;;;/p-3
  • F[Dy](F)F
Molar mass 219.50
Density 7.45 g·cm−3
GHS labelling:
GHS07: Exclamation mark
H315, H319, H335
Related compounds
Other anions
Dysprosium(III) chloride, Dysprosium(III) bromide, Dysprosium(III) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Dysprosium(III) fluoride is an inorganic compound of dysprosium with a chemical formula DyF3.


Dysprosium(III) fluoride can be produced by mixing dysprosium(III) chloride or dysprosium(III) carbonate into 40% hydrofluoric acid.[1]

DyCl3 + 3 HF → DyF3 + 3 HCl
Dy2(CO3)3 + 6 HF → 2 DyF3 + 3 H2O + 3 CO2

DyF3 can also be produced by hydrothermal reaction of dysprosium nitrate and sodium tetrafluoroborate at 200 °C.[2]

DyF3 can also be produced when dysprosium oxide and ammonium bifluoride are mixed and heated to 300 °C until the oxide is porous, and continued to heat to 700 °C. When hydrogen fluoride is introduced, a reaction occurs:[3]

Dy2O3 + 6 HF → 2 DyF3 + 3 H2O


Dysprosium(III) fluoride is a white, odorless solid that is insoluble in water.[4] It has an orthorhombic crystal structure with the space group Pnma (space group no. 62).[5]


  1. ^ Wang Ya-jun, Suo Quan-ling, Hao Dong-sheng, Liu Qian, Guo Feng. 稀土氟化物的沉淀方法及组成研究 (in Chinese) (lit. Precipitation and composition of rare earth fluorides). Chinese Rare Earths, 2000, 21 (1): 14-18.
  2. ^ 孙元平, 贾佩云, 王芳, 等. 水热条件下稀土氟化物形貌的规律性生长[J]. 中国陶瓷, 2013(6).
  3. ^ 刘文生, 云月厚, 李国栋. 干法氟化制备高纯金属镝的工艺研究[J]. 稀有金属, 2003, 27(1):154-156.
  4. ^ Dysprosium(III) fluoride at AlfaAesar, accessed on 2023-12-22 (PDF) (JavaScript required).[dead link]
  5. ^ Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN 978-3-540-60035-0.