Samarium -sulfide

Cooling of samples of crystalline samarium sulfide containing 22 atom% of gadolinium in the lattice to below — 153°C causes a near-explosive rearrangement to a powder form. This was attributed to changes in the lattice constants corresponding to a volume increase of 7.5%. 

Germanium(II) sulfide, 4419 Gold(III) sulfide, 0116 Iron disulfide, 4401 Iron(II) sulfide, 4400 Iron(III) sulfide, 4404 Manganese(II) sulfide, 4706 Manganese(IV) sulfide, 4707 Mercuiy(II) sulfide, 4607 Molybdemun(IV) sulfide, 4719 Potassium sulfide, 4670 Rhenium(VII) sulfide, 4891 Ruthenium(IV) sulfide, 4895 Samarium sulfide, 4899 Silver sulfide, 0026 Sodium disulfide, 4812 Sodium polysulfide, 4813 Sodium sulfide, 4811 Strontium sulfide, 4901 Tantalum(TV) sulfide, 4903... 

Evacuated tubes are used when the products or reactants are sensitive to air or water or are volatile. An example of the use of this method Is the preparation of samarium sulfide. In this case, sulfur has a low boiling temperature (717 K) and an evacuated tube Is necessary to prevent It boiling off and being lost from the reaction vessel. 

Iron disulfide, 4395 Iron(II) sulfide, 4394 Iron(III) sulfide, 4398 Manganese(II) sulfide, 4701 Manganese(IV) sulfide, 4702 Mercury(II) sulfide, 4602 Molybdenum(IV) sulfide, 4714 Potassium sulfide, 4665 Rhenium(VII) sulfide, 4885 Ruthenium(IV) sulfide, 4889 Samarium sulfide, 4893 Silver sulfide, 0035 Sodium disulfide, 4806 Sodium polysulfide, 4807 Sodium sulfide, 4805 Strontium sulfide, 4895... 

Mixed valent compounds samarium sulfide and thulium selenide... 

The valence change in the rare earth monochalcogenides shows itself in a rather spectacular manner in the optical reflectivity. Samarium sulfide which appears black in the semiconducting state turns brilliant gold in color after the 6.5 kbar transition (Kirk et al., 1972), SmSe a bright copper-like color on... 

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