title: Use of [Pb-Pb]3+ center of the amazonite for dating.
abstract: In the present work, dating of one type of amazonite sample using the [Pb-Pb]3+ dimeric center is carried out by electron spin resonance (ESR). The thermal stability of the center is investigated using isochronal annealing at several temperatures from 200 to 500 degrees C for 15 min. Using isothermal annealing, the lifetime of the center was also estimated. The extrapolation of the straight line in the Arrhenius plot gives a lifetime of approximately 0.25 Ma at room temperature. The age obtained from sample was 90 ka.
authors.affiliation: Institute of Physics, University of São Paulo, CP 66318, 05315-970, São Paulo SP, Brazil. Juan.mittani@dfn.if.usp.br
authors.forename: J C R
authors.initials: JC
authors.lastname: Mittani
authors.forename: N F
authors.initials: NF
authors.lastname: Cano
authors.forename: S
authors.initials: S
authors.lastname: Watanabe