A disordered cerium(IV) phosphate with a tunnel structure, K4CeZr(PO4)4.
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.
Ogorodnyk
Ivan V
IV
Department of Inorganic Chemistry, Taras Shevchenko National University, 64 Volodymyrska Str., 01033 Kyiv, Ukraine. ogorod@bigmir.net
Zatovsky
Igor V
IV
Baumer
Vyacheslav N
VN
Slobodyanik
Nikolay S
NS
Shishkin
Oleg V
OV