title: (Li/Ag)CoO2: a new intergrowth cobalt oxide composed of rock salt and delafossite layers.
abstract: A new ordered (Li/Ag)CoO(2) layered compound with an unusual oxygen packing combining rock salt and delafossite layers is obtained during the (Li(+), Na(+))/Ag(+) ionic exchange from the OP4-(Li/Na)CoO(2) precursor. This compound is actually an intermediate step to the final D4-AgCoO(2) delafossite and can be isolated thanks to the kinetics difference between the Li(+)/Ag(+) and Na(+)/Ag(+) exchange processes. It crystallizes in the P6(3)/mmc space group with cell parameters a(hex.) = 2.848(3) Å and c(hex.) = 21.607(7) Å. The details of the structure as well as its thermal stability and transport properties are presented and discussed.
authors.affiliation: CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, 33608 F-Pessac, France.
authors.forename: R
authors.initials: R
authors.lastname: Berthelot
authors.forename: M
authors.initials: M
authors.lastname: Pollet
authors.forename: J-P
authors.initials: JP
authors.lastname: Doumerc
authors.forename: C
authors.initials: C
authors.lastname: Delmas