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Preparation of Ln2O2S (Ln = Gd,Dy, Y,Er, Lu) in flowing hydrogen and hydrogen sulfide |
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| Authors: | P O Andreev E I Sal’nikova I M Kovenskii |
| Affiliation: | 1. Tyumen State Oil and Gas University, ul. Volodarskogo 38, Tyumen, 625000, Russia 2. Northern Transurals State Agrarian University, ul. Respubliki 7, Tyumen, 625003, Russia 3. Tyumen State University, ul. Semakova 10, Tyumen, 625003, Russia |
| Abstract: | The exposure of anhydrous Ln2(SO4)3 (Ln = Gd, Dy, Y, Er, Lu) sulfates to flowing hydrogen in the range 500–1050°C leads to the formation of Ln2O2S + Ln2O3 materials. With increasing reaction temperature, the mole fraction of Ln2O2S in the samples decreases. Single-phase Ln2O2S (Ln = Gd, Dy, Y, Er, Lu) compounds have been obtained by exposing the rare-earth sulfates first to flowing hydrogen in the range 500–600°C and then to hydrogen sulfide in the range 850–950°C. |
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