Neodymium oxychloride

Neodymium oxychloride

Names
Other names Neodymium oxide chloride
Identifiers
3D model (JSmol)	Interactive image
PubChem CID	172678238
InChI InChI=1S/ClH.Nd.O/h1H;;/q;+3;-2/p-1 Key: AANUWLYYJMIHDX-UHFFFAOYSA-M
SMILES [Nd+3].[O-2].[Cl-]
Properties
Chemical formula	ClNdO
Molar mass	195.69 g·mol−1
Appearance	crystals
Structure
Crystal structure	tetragonal
Space group	P4/nmm
Related compounds
Related compounds	Praseodymium oxychloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Neodymium oxychloride or praseodymium oxide chloride is an inorganic compound of neodymium, oxygen, and chlorine with the chemical formula NdOCl. ^[1]

Synthesis

NdOCl can be synthesized by reacting neodymium oxide (Nd₂O₃) and calcium dichloride (CaCl₂). ^[2]

Nd₂O₃ + CaCl₂ → 2NdOCl + CaO ^[3]

Physical properties

The compound forms crystals of tetragonal system, space group P4/nmm. ^{[4] [5] [6]}

It exhibits paramagnetic susceptibility and structural stability.

Chemical properties

NdOCl can be reduced to metallic neodymium through high-temperature electrolysis, specifically within the FFC (Fray-Farthing-Chen) process. ^[1]

NdOCl + 1.5Ca → Nd + CaO + 0.5CaCl₂ ^[7]

Uses

NdOCl has been investigated as a cathode material for the extraction of metallic neodymium. ^[1]

References

1. Song, Jianxun; Li, Shaolong; Che, Yusi; Fan, Yong; Jiao, Handong; Shu, Yongchun; He, Jilin (1 November 2020). "Synthesis and characterization of neodymium oxychloride". Journal of Materials Research and Technology . 9 (6): 16378–16386. doi:10.1016/j.jmrt.2020.11.035. ISSN   2238-7854 . Retrieved 5 July 2025.
2. Song, Jianxun; Guo, Muxing; Mukherjee, Abhishek; Blanpain, Bart; Fransaer, Jan (10 December 2017). "Extraction of neodymium by direct reduction of NdOCl in molten calcium chloride". Electrochimica Acta . 257: 465–472. doi:10.1016/j.electacta.2017.10.103. ISSN   0013-4686 . Retrieved 5 July 2025.
3. Mamantov, Gleb (1987). Proceedings of the Joint International Symposium on Molten Salts. Electrochemical Society. p. 848. Retrieved 5 July 2025.
4. Donnay, Joseph Désiré Hubert (1963). Crystal Data; Determinative Tables. American Crystallographic Association. p. 603. Retrieved 5 July 2025.
5. Report [of] Joint Committee Fellowship [on] Standard X-ray Diffraction Powder Patterns to Joint Committee on Chemical Analysis by Powder Diffraction Methods. United States National Bureau of Standards. 1951. p. 24. Retrieved 5 July 2025.
6. National Bureau of Standards Circular. U.S. Department of Commerce, National Bureau of Standards. 1959. p. 37. Retrieved 5 July 2025.
7. Krishnamurthy, Nagaiyar (20 December 2004). Extractive Metallurgy of Rare Earths. CRC Press. p. 262. ISBN   978-0-203-41302-9 . Retrieved 5 July 2025.