title: A disordered cerium(IV) phosphate with a tunnel structure, K4CeZr(PO4)4.
abstract: Tetrapotassium cerium(IV) zirconium tetrakis(monophosphate) crystallizes in the tetragonal system (space group I4(1)/amd). A complex disorder in K4CeZr(PO4)4 involves the mixing of Ce and Zr atoms on a single site with -4m2 symmetry and the splitting of P- and O-atom positions, equivalent to a rotation of the phosphate groups, to yield eight- and sixfold coordination environments around Ce and Zr, respectively. The K atoms are located in tunnels running parallel to the a and b axes.
authors.affiliation: Department of Inorganic Chemistry, Taras Shevchenko National University, 64 Volodymyrska Str., 01033 Kyiv, Ukraine. ogorod@bigmir.net
authors.forename: Ivan V
authors.initials: IV
authors.lastname: Ogorodnyk
authors.forename: Igor V
authors.initials: IV
authors.lastname: Zatovsky
authors.forename: Vyacheslav N
authors.initials: VN
authors.lastname: Baumer
authors.forename: Nikolay S
authors.initials: NS
authors.lastname: Slobodyanik
authors.forename: Oleg V
authors.initials: OV
authors.lastname: Shishkin