title: Magnesium isotope separation by ion exchange using hydrous manganese(IV) oxide.
abstract: The magnesium isotope effects were investigated by chemical ion exchange with a hydrous manganese(IV) oxide. The capacity of manganese(IV) oxide was 0.5 meq g(-1). The distribution coefficient of magnesium ions on the MnO(2) was determined by a batch method. The heavier isotopes of magnesium were enriched in the solution phase, while the lighter isotopes were enriched in the hydrous MnO(2) phase. The separation factor was determined according to the method of Glueckauf from the elution curve and isotopic assays. The separation factors of (24)Mg(2+)-(25)Mg(2+), (24)Mg(2+)-(26)Mg(2+), and (25)Mg(2+)-(26)Mg(2+) isotope pair fractionations were 1.011, 1.021, and 1.011, respectively.
authors.affiliation: Department of Chemistry, Physical Chemistry Laboratory, College of Natural Sciences, Chungbuk National University, Cheongju 361-763, South Korea.
authors.forename: D W
authors.initials: DW
authors.lastname: Kim
authors.forename: B K
authors.initials: BK
authors.lastname: Jeon
authors.forename: N S
authors.initials: NS
authors.lastname: Lee
authors.forename: C S
authors.initials: CS
authors.lastname: Kim
authors.forename: H I
authors.initials: HI
authors.lastname: Ryu