title: New crystals in the lithium sulfate family.
abstract: The preparation and structures of caesium lithium sulfate, Cs(1.15)Li(2.85)(SO(4))(2), and caesium lithium rubidium sulfate, Cs(0.90)Li(2.88)Rb(0.22)(SO(4))(2), are described and discussed in the context of simple and double sulfate polymorphism. The latter structure is related to the former through the substitution of Rb for Cs. In both crystals, the sulfate ions occupy two non-equivalent sites, but the ions are disordered in Cs(1.15)Li(2.85)(SO(4))(2).
authors.affiliation: Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, CEP 60455-760, Fortaleza, CE, Brazil.
authors.forename: Ricardo J C
authors.initials: RJ
authors.lastname: Lima
authors.forename: Jose M
authors.initials: JM
authors.lastname: Sasaki
authors.forename: Alejandro P
authors.initials: AP
authors.lastname: Ayala
authors.forename: Paulo T C
authors.initials: PT
authors.lastname: Freire
authors.forename: Josue
authors.initials: J
authors.lastname: Mendes-Filho
authors.forename: Francisco E A
authors.initials: FE
authors.lastname: Melo
authors.forename: Javier
authors.initials: J
authors.lastname: Ellena
authors.forename: Sauli
authors.initials: S
authors.lastname: Santos