title: Bis(adamantan-1-aminium) carbonate.
abstract: In the title compound, 2C(10)H(18)N(+)·CO(3) (2-), the adamantan-1-aminium cation forms three N-H⋯O hydrogen bonds to three carbonate ions, resulting in a layer parallel to (001) with the adamantane groups located on its surface so that adjacent layers form only C-H⋯H-C contacts. The carbonate anions occupy special positions of 32 symmetry, whereas the adamantan-1-aminium cations occupy special positions of 3 symmetry.
authors.affiliation: Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, PO Wits 2050,  South Africa.
authors.forename: Monika
authors.initials: M
authors.lastname: Nowakowska
authors.forename: Caryn
authors.initials: C
authors.lastname: Gamble
authors.forename: Demetrius C
authors.initials: DC
authors.lastname: Levendis