Crystal structure of dicaesium strontium hexa-cyanidoferrate(II), CsSr[Fe(CN)], from laboratory X-ray powder data.

Ferrocyanides with general formula [Fe(CN)], where and are cations, are thought to accept many substitutions on the and positions. In this communication, the synthesis and crystal structure of CsSr[Fe(CN)] are reported. The latter was obtained from KBa[Fe(CN)] particles, put in contact with caesium and strontium ions.

Reinvestigation of the crystal structure of CaCe(SiO)O apatite by Rietveld refinement.

Ca(SiO)O apatites with = La, Ce, Pr, Nd, Sm, Eu, Gd and Tb crystallize in space group 6/. The crystal structure of apatite-type CaCe(SiO)O [dicalcium octa-cerium hexa-kis-(silicate) dioxide], which has been synthesized by calcination, was refined from powder X-ray diffraction data using the Rietveld method. A database survey shows that contrary to the previously published CaCe(SiO)O structure [Skakle (2000 ▸).

Crystal structure of NaHfSiO by Rietveld refinement.

The structure of triclinic disodium hafnium disilicate, NaHfSiO, has been determined by laboratory powder X-ray diffraction and refined by the Rietveld refinement. The structure is a framework made of alternate layers of HfO octa-hedra and SiO tetra-hedra linked by common O atoms. Sodium atoms are located in the voids of the framework, aligned into tunnels along the [010] direction.