JMSSJ On-line

JMSSJ On-line, Vol. 44 (1996) No. 1, pp. 79-83

A Variety of ¹⁴³Nd/¹⁴⁴Nd Ratios among Six High Purity Neodymium Oxide Reagents		>> Full Text PDF >> References
*Tsuyoshi TANAKA,^a) Masaharu TANIMIZU,^a) Yoshihiro ASAHARA,^a) Chinatsu YONEZAWA,^a) Shigeko TOGASHI,^b) and Hikari KAMIOKA^b)** ^a) Department of Earth and Planetary Sciences, School of Science, Nagoya University (Chikusa-ku, Nagoya 464-01, Japan)* ^b) Geological Survey of Japan (Higashi 1-1-3, Tsukuba, Ibaraki 305, Japan)

¹⁴³Nd/¹⁴⁴Nd isotopic ratio and rare-earth impurities are examined for high purity neodymium oxide prepared by six chemical companies. The isotopic ratios of the reagents are grouped into four and vary from 0.511463 to 0.512238. Some of the reagents contain impurities more than 1 ppm for lanthanum, cerium and samarium. A neodymium isotopic reference will be prepared according to the result.

Key words: Neodymium isotope, Isotope reference, LaJolla neodymium