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The quasi-binary systems Zn 1-x Cd x Al 2 S 4 , ZnAl 2(1-x) Ga 2x S 4  and ZnAl 2 S 4(1-x) Se 4x  have been investigated by X-ray diffraction and vibrational spectroscopy. In the spinel ZnAI 2 S 4  up to 20% of Zn can be replaced by Cd. In the two other systems, ZnAl 2 S 4  has no detectable homogeneity range. The thiogallate phases have much broader ranges of homogeneity. The compositions of the compounds at the phase boundary of the thiogallate phase are Zn 0.4 Cd 0.6 Al 2 S 4 , ZnGa 0.4 Al 1.6 S 4 , and ZnAl 2 S 2.8 Se 1.2 . At approximately 950 °C ZnAl 2 Se 4  undergoes a reversible phase transition to a wurtzite-type structure. This phase transition is also observed for the solid solutions ZnAl 2 S 4(1-x) Se 4x ; with 1.0 &gt; x &gt; 0.3. The FIR spectra are discussed.

zeitschrift für naturforschung b

Die quaternären Systeme ZnAl 2 S 4 -ZnGa 2 S 4 , ZnAl 2 S 4 -CdAl 2 S 4  und ZnAl 2 S 4 -ZnAl 2 Se 4 . Röntgenographische und schwingungsspektroskopisehe Untersuchungen / Investigation of the Quaternary Systems ZnAl 2 S 4 -ZnGa 2 S 4 , ZnAl 2 S 4 -CdAl 2 S 4  and ZnAl 2 S 4 -ZnAl 2 Se 4  by X-Ray Diffraction and Vibrational Spectroscopy