Syntheses and single-crystal structures of CsTh(MoO{sub 4}){sub 2}Cl and Na{sub 4}Th(WO{sub 4}){sub 4}

• Published in: Journal of solid state chemistry Vol. 184; no. 2
• Main Authors: Bang Jin, Geng, Soderholm, L.
• Format: Journal Article
• Language: English
• Published: United States 15.02.2011
• Subjects: ACTINIDE COMPOUNDS; ALKALI METAL COMPOUNDS; CESIUM CHLORIDES; CESIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CHLORIDES; CHLORINE COMPOUNDS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; DIFFRACTION; HALIDES; HALOGEN COMPOUNDS; IONS; MATERIALS SCIENCE; MOLYBDATES; MOLYBDENUM COMPOUNDS; MOLYBDENUM OXIDES; MONOCLINIC LATTICES; MONOCRYSTALS; ORTHORHOMBIC LATTICES; OXIDES; OXYGEN COMPOUNDS; REFRACTORY METAL COMPOUNDS; SCATTERING; SODIUM COMPOUNDS; SODIUM IONS; SODIUM TUNGSTATES; SUPERLATTICES; TETRAGONAL LATTICES; THORIUM CHLORIDES; THORIUM COMPOUNDS; THORIUM OXIDES; TRANSITION ELEMENT COMPOUNDS; TUNGSTATES; TUNGSTEN COMPOUNDS; X-RAY DIFFRACTION
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2010.12.003

Colorless crystals of CsTh(MoO{sub 4}){sub 2}Cl and Na{sub 4}Th(WO{sub 4}){sub 4} have been synthesized at 993 K by the solid-state reactions of ThO{sub 2}, MoO{sub 3}, CsCl, and ThCl{sub 4} with Na{sub 2}WO{sub 4}. Both compounds have been characterized by the single-crystal X-ray diffraction. The structure of CsTh(MoO{sub 4}){sub 2}Cl is orthorhombic, consisting of two adjacent [Th(MoO{sub 4}){sub 2}] layers separated by an ionic CsCl sublattice. It can be considered as an insertion compound of Th(MoO{sub 4}){sub 2} and reformulated as Th(MoO{sub 4}){sub 2}.CsCl. The Th atom coordinates to seven monodentate MoO{sub 4} tetrahedra and one Cl atom in a highly distorted square antiprism. Na{sub 4}Th(WO{sub 4}){sub 4} adopts a scheelite superlattice structure. The three-dimensional framework of Na{sub 4}Th(WO{sub 4}){sub 4} is constructed from corner-sharing ThO{sub 8} square antiprisms and WO{sub 4} tetrahedra. The space within the channels is filled by six-coordinate Na ions. Crystal data: CsTh(MoO{sub 4}){sub 2}Cl, monoclinic, P2{sub 1}/c, Z=4, a=10.170(1) A, b=10.030(1) A, c=9.649(1) A, {beta}=95.671(2){sup o}, V=979.5(2) A{sup 3}, R(F)=2.65% for I>2{sigma}(I); Na{sub 4}Th(WO{sub 4}){sub 4}, tetragonal, I4{sub 1}/a, Z=4, a=11.437(1) A, c=11.833(2) A, V=1547.7(4) A{sup 3}, R(F)=3.02% for I>2{sigma}(I). -- Graphical abstract: The two-dimensional layered structure of CsTh(MoO{sub 4}){sub 2}Cl viewed down the b axis. Display Omitted Research highlights: {yields} Syntheses of CsTh(MoO{sub 4}){sub 2}Cl and Na{sub 4}Th(WO{sub 4}){sub 4} from chlorides. {yields} Single-crystal structures of CsTh(MoO{sub 4}){sub 2}Cl and Na{sub 4}Th(WO{sub 4}){sub 4}. {yields} CsTh(MoO{sub 4}){sub 2}Cl can be considered as an inclusion compound composed of covalent [Th(MoO{sub 4}){sub 2}] layer and ionic [CsCl] layers. {yields} Na{sub 4}Th(WO{sub 4}){sub 4} adopts a defect scheelite structure.