Synthesis and Crystal Structure of a New Compound, Lanthanum Dioxymonocyanamide (La2O2CN2)

✍ Scribed by Yasuhiro Hashimoto; Masao Takahashi; Shinichi Kikkawa; Fumikazu Kanamaru

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 136 KB
• Volume: 114
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1995.1090

✦ Synopsis

A new compound was prepared by heating (\mathrm{La}{2} \mathrm{O}{3}) in the presence of carbon under an ammonia atmosphere. The chemical formula of the compound was determined to be (\mathrm{La}{2} \mathrm{O}{2} \mathrm{CN}{2}) both from results of CHN analysis and weight change upon oxidation of the compound to (\mathrm{La}{2} \mathrm{O}{3}). The existence of (\mathrm{CN}{2}^{2-}) ions was confirmed by IR and (\mathrm{X})-ray photoelectron spectroscopy. The structure is tetragonal with cell constants (a=4.0964) (2) (\AA, c=12.333) (1) (\AA), and (Z=) 2. X-ray Rietveld analysis revealed that the compound has a layered-type structure with space group, ([4 / \mathrm{mmm}). O 1995 Academlc Press. Inc.