Dysprosium(III) fluoride

Dysprosium(III) fluoride

Identifiers
CAS Number	13569-80-7
3D model (JSmol)	Interactive image
ChemSpider	75417
ECHA InfoCard	100.033.615
EC Number	236-992-9
PubChem CID	83587
CompTox Dashboard (EPA)	DTXSID7065542
InChI InChI=1S/Dy.3FH/h;3*1H/q+3;;;/p-3 Key: FWQVINSGEXZQHB-UHFFFAOYSA-K
SMILES F[Dy](F)F
Properties
Chemical formula	DyF3
Molar mass	219.50
Appearance	White crystalline powder
Density	6.9 g/cm3
Melting point	1,740 °C
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	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). Infobox references

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

Production

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

Properties

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]

References

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.