title: Synthesis and characterisation of a {Ni21Ag} cage.
abstract: An unusual {Ni21Ag} cluster is reported and demonstrates the importance of examining the "counter-ion" present in all reactions involving polymetallic complexes.
authors.affiliation: Departament de Quimica Inorganica, Universitat de Barcelona, Diagonal 647, 08028-Barcelona, Spain. guillem.aromi@qi.ub.es
authors.forename: Guillem
authors.initials: G
authors.lastname: Aromi
authors.forename: Aidan
authors.initials: A
authors.lastname: Bell
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Teat
authors.forename: Richard E P
authors.initials: RE
authors.lastname: Winpenny