Lanthanum oxychloride

Lanthanum oxychloride
Names
Other names
Lanthanum oxide chloride
Identifiers
3D model (JSmol)
ECHA InfoCard 100.403.288
  • InChI=1S/ClH.La.O/h1H;;/q;+3;-2/p-1
    Key: STLFZIUSZCELIB-UHFFFAOYSA-M
  • [Cl-].[Ln+3].[O-2]
Properties
LaOCl
Molar mass 190.35 g/mol
Appearance crystals
Structure
tetragonal
P4/nmm
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Lanthanum oxychloride or lanthanum oxide chloride is an inorganic compound with the chemical formula LaOCl.[1]

Synthesis and structure

LaOCl can be prepared by treating La2O3 with hydrochloric acid.[2] It also us formed by hydrolysis of LaCl3 :[3]

LaCl3 + H2O → LaOCl + 2HCl

LaOCl adopts the structure seen also for lead chloride fluoride, which exists as the mineral matlockite. In this motif, the La3+ center is eight-coordinated, being bound to four chloride and four oxide ligands.[4]

Structure of PbFCl,[5] which is also observed for LaOCl. The larger green spheres are chloride, the tetrahedrally bonded smaller green spheres represent oxide.

Physical properties

LaOCl decomposes to La2O3 at about 700 °C in static air.[6][7]

The compound forms crystals of tetragonal system, space group P4/nmm.[8][9]

References

  1. ↑ Zhu, Xiurong; Yu, Yi; Yuan, Jvjun; Zhang, Xianke; Yu, Huajun; Zhang, Wen; Du, Ai; Zhou, Bin (11 August 2017). "Synthesis, characterization and mechanism of formation of carbon aerogels incorporated with highly crystalline lanthanum oxychloride particles". RSC Advances. 7 (63): 39635–39640. Bibcode:2017RSCAd...739635Z. doi:10.1039/C7RA05454H. ISSN 2046-2069.
  2. ↑ Wachsman, E. D. (2003). Solid-state Ionic Devices III: Proceedings of the International Symposium. The Electrochemical Society. p. 439. ISBN 978-1-56677-388-1. Retrieved 5 July 2025.
  3. ↑ Koch, Charles William (1953). Thermodynamics of the Trichlorides and Oxychlorides of Some of the Lanthanide and Actinide Elements (thesis). Radiation Laboratory, University of California. p. 65. Retrieved 5 July 2025.
  4. ↑ Kort, Kenneth R.; Banerjee, Sarbajit (2011). "Shape-Controlled Synthesis of Well-Defined Matlockite LnOCl (Ln: La, Ce, Gd, Dy) Nanocrystals by a Novel Non-Hydrolytic Approach". Inorganic Chemistry. 50 (12): 5539–5544. doi:10.1021/ic200114s. PMID 21568295.
  5. ↑ Pasero, M.; Perchiazzi, N. (1996). "Crystal structure refinement of matlockite". Mineralogical Magazine. 60 (402): 833–836. doi:10.1180/minmag.1996.060.402.15.
  6. ↑ Zhu, Xiurong; Hope-Weeks, Louisa J.; Ramirez, Donald; Baghi, Roya; Charles, Vanessa R.; He, Yinjie (5 September 2019). "Controllable decomposition of lanthanum oxychloride through different annealing conditions". Journal of Alloys and Compounds. 800: 29–34. doi:10.1016/j.jallcom.2019.06.071. ISSN 0925-8388. Retrieved 5 July 2025.
  7. ↑ Tian, Hao; Guo, Jincheng; Pei, Yu; Hou, Shaochun; Wang, Yuanjiang; Xia, Yumei (12 September 2024). "A synthetic method for lanthanum hydroxychloride suitable for industrialization and its thermal decomposition properties". RSC Advances. 14 (40): 29282–29287. doi:10.1039/D4RA03987D. ISSN 2046-2069. PMC 11403709. PMID 39285880.
  8. ↑ 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.
  9. ↑ Circular of the National Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards. 1956. p. 22. Retrieved 5 July 2025.
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