Direct observation of charge transfer in lithium-intercalated 2H-Tase2 by 181Ta Mössbauer spectroscopy

✍ Scribed by M. Eibschutz; D. Salomon; D.W. Murphy; S. Zahurak; J.V. Waszczak

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 231 KB
• Volume: 135
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)85217-x

✦ Synopsis

High resolution Miissbauer resonance of the 6.2 keV y-rays of '*'Ta have been observed in a single crystal of 2H-TaSez and a lithiated crystal. The lithiated sample has been pepared by a novel technique. The isomer shift (IS) increases from 82.68 mm/s for ZH-TaSez to 107 mm/s for 2H-LiO g,TaSez. The IS results reflect the change of the electronic configuration of Ta from Ta4+ (5d') toward Ta3+ ( 5d2) and an increase in ionicity as the lithium content increases from 0 to 0.9 1. A value of % 27 mm/s per e-has been derived for the IS change due to charge transfer from Li to Ta.