Manganese is part of the iron group of elements which are thought to
be synthesized in large stars shortly before supernova explosion. Manganese-53
decays to 53Cr with a half-life of 3.7 Myr. Because of its relatively
short half-life, 53Mn is an extinct radionuclide. Manganese
isotopic contents are typically combined with chromium isotopic contents
and have found application in isotope geology.
Mn-Cr isotopic ratios reinforce the evidence from 26Al and
107Pd for the early history of the solar system. Variations
in 53Cr/52Cr and Mn/Cr ratios from several meteorites indicate
an initial 53Mn/55Mn ratio that suggests Mn-Cr isotopic
systematics must result from in-situ decay of 53Mn in differentiated
planetary bodies (Birck and Allegre, 1985, 1988). Hence 53Mn
provides additional evidence for nucleosynthetic processes immediately
before coalescence of the solar system.
Source of text: This review was assembled by Eric Caldwell,
primarily from Dicken (1995).
||Birck, J.L. and Allegre, C.J. (1985). "Evidence for the presence
of 53Mn in the early solar system." Geophys. Res. Lett.,
||Birck, J.L. and Allegre, C.J. (1988). "Manganese-chromium isotope
systematics and the development of the early solar-system." Nature,
||Dicken, A.P. (1995). Radiogenic Isotope Geology. Cambridge University
Press, New York, 452 pp.