Cesium chalcogenides

It has been shown that modification of the distribution of species in aqueous polysulfide solution can be correlated to variations in transparency, conductivity, activity, and cadmium chalcogenide photoelectrochemistry. Specifically, the separate effects of hydroxide and pH modification [42], sulfur [43] and sulfide [44], and cation [45, 46] were investigated in terms of spedation and photoelectrochemical phenomena. Previously cadmium chalcogenide polysulfide PECs had generally employed electrolytes composed 1 molar in sodium sulfide, sulfur and sodium hydroxide and resulted in solar conversion efficiencies of approximately 7% [31-33]. However, added hydroxide is to be minimized in these cells, cesium is the... 

Polymorphic transformations into the structure with Ac > 8 were observed in cesium halides [71-74] atfollowing pressures CsCl 65, CsBr 53, Csl 39 GPa besides, Csl at P > 200 GPa undergoes a smooth second-order transition into a hep structure with Ac = 12. Very peculiar transitions were observed in samarium chalcogenides SmX under high pressures the electron transition Sm(II) Sm(III) takes place with a sharp isomorphic decrease in the lattice parameters. Further compression leads to the transformation of the NaCl CsCl type. Values of pressures at the isomorphic (Pitr) and polymorphic (Pptr) transitions according to [75, 76] are following ... 

The following chemical symbols are used in this chapter R designates the rare earth elements, including the lanthanides, yttrium and scandium M stands for the elements of group I (lithium, sodium, calcium, rubidium, cesium, copper, silver), X is used to designate chalcogenides (sulphur, selenium, tellurium). 

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