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Synthesis and Crystal Structure of a New Oxysulfide Gd6+xTi4 –xS10 – yO6+y (where x ~ 0.04 and y ~ 0.27)
-
Vincent Meignen
,
Laurent Cario
Veröffentlicht/Copyright:
2. Juni 2014
A new phase in the quaternary system Gd/Ti/S/O was obtained from a mixture of Gd2O3, Gd2S3, TiO2, TiS2 and Ti by a solid state reaction at 1323 K in a sealed fused-silica tube. The structure of Gd6+xTi4−xS10−yO6+y (where x ~ 0.04, and y ~ 0.27), was solved by single-crystal X-ray diffraction, with R(obs) = 2.69% for 2391 reflections (I > 3σ (I)) and 155 variables. This compound crystallizes with four formula units in the orthorhombic space group Pnma, and the lattice constants (Å ): a = 13.991(1), b = 3.7124(2), c = 34.029(3) Å. The structure is built up from the stacking of ribbons of five Gd-polyhedra alternating with ribbons of five Ti- and Gd/Ti-polyhedra along the a-axis. This is the first example of a rare earth (RE) and titanium oxysulfide compound that shows mixed RE/Ti sites together with pure RE- and Ti-sites. Gd6+xTi4−xS10−yO6+y is a mixed-valent titanium oxysulfide in which half of the Ti cations are Ti3+ and half are Ti4+.
Received: 2004-6-16
Published Online: 2014-6-2
Published in Print: 2004-9-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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Artikel in diesem Heft
- Antiferromagnetic Ordering in GdRhIn5
- Crystal Structure and Thermal Behaviour of Er2(SeO4)3 · 8H2O
- Synthesis and Crystal Structure of a New Oxysulfide Gd6+xTi4 –xS10 – yO6+y (where x ~ 0.04 and y ~ 0.27)
- On the Silicides EuIr2Si2 and Lu5Si3
- From Yellow to Black: New Semiconducting Ba Chalcogeno-Germanates
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- Quaternäre Strontium-Kupfer(I)-Lanthanoid(III)-Selenide mit Cer und Praseodym: SrCuCeSe3 und SrCuPrSe3, ein ungleiches Geschwisterpaar / Quaternary Strontium Copper(I) Lanthanoid(III) Selenides with Cerium and Praseodymium: SrCuCeSe3 and SrCuPrSe3, Unequal Brother and Sister
- Synthesis, Crystal Structure and Thermal Properties of Silver(I) Bromide Ethylenediamine Coordination Polymers
- Pt3Ga: Thermodynamics and Nonstoichiometry
- Low Dimensional Materials: Syntheses, Structures, and Optical Properties of Rb2CuTaS4, Rb2CuTaSe4, RbCu2TaSe4, K3Ag3Ta2Se8, and Rb3AgTa2Se12
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- “Weak” OH···πHydrogen Bonds in the Structures of Two Phenols
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