Three New Lanthanum Oxoantimonate(III) Halides: Synthesis and Crystal Structure of La5Cl3[SbO3]4, La2Sb12O19Br4 and La2Sb12O19I4

被引:2
作者
Locke, Ralf J. C. [1 ]
Bozenhardt, Kim-Natalie [1 ]
Goerigk, Felix C. [1 ,2 ]
Schleid, Thomas [1 ]
机构
[1] Univ Stuttgart, Inst Inorgan Chem, D-70569 Stuttgart, Germany
[2] Leuchtstoffwerk Breitungen GmbH, D-98597 Breitungen, Germany
关键词
lanthanum; oxoantimonates(III); halides; crystal structures; Raman spectra; ANTIMONY(III) OXIDE IODIDE; SINGLE-CRYSTAL; ONORATOITE; REFINEMENT; TRIOXIDE; POLYTYPE;
D O I
10.3390/cryst13050731
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
It was possible to synthesize colorless single crystals of La5Cl3[SbO3](4) (block-shaped) as well as La2Sb12O19Br4 and La2Sb12O19I4 (both needle-shaped), representing three new compounds from the system of lanthanum oxoantimonate(III) halides, which have not been described in the literature before. La5Cl3[SbO3](4) crystallizes in the monoclinic space group P2/c with the lattice parameters a = 895.82(5) pm, b = 564.28(3) pm, c = 1728.19(9) pm, and beta 3 = 90.007(2)degrees for Z = 2. This layered compound contains isolated psi(1)-tetrahedral [SbO3](3-) units, square hemiprisms [LaO8](13-), and antiprisms [LaO4Cl4](9-). La2Sb12O19Br4 and La2Sb12O19I4 crystallize isotypically in the orthorhombic space group Pnma with a = 3184.69(19) pm, b = 417.78(3) pm, c = 1019.85(6) pm for the bromide and a = 3215.08(19) pm, b = 419.94(3) pm, c = 1062.89(6) pm for the iodide. Instead of isolated [SbO3](3-) anions, semi-tubular features (1)(infinity){[Sb12O19](2-)} are present, which consist mainly of [SbO4](5-) and few [Sb03]3- units with stereochemically active electronic lone pairs at their Sb3+ centers. Within these socalled "double-halfpipes", La3+ is surrounded by nine oxygen atoms as [LaO9](15-) polyhedron without any contact with X- anions. Single -crystal Raman measurements were performed for La5Cl3[SbO3](4) and La2Sb12O19I4, and La5Cl3[SbO3](4) was structurally compared with the isostoichiometric, but not isotypic La5F3[SFO3](4).
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页数:20
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