Beryllium selenide BeSe

Beryllium sulfide, BeS beryllium selenide, BeSe beryllium telluride, BeTe beryllium polonide, BePo magnesium sulfide, MgS magnesium selenide, MgSe magnesium telluride, MgTe calcium sulfide, CaS (oldhamite) calcium selenide, CaSe calcium telluride, CaTe strontium sulfide, SrS strontium selenide, SrSe barium sulfide, BaS barium selenide, BaSe barium hydrosulfide, Ba(HS)2 barium hydrosulfide tetrahydrate, Ba(HS)2 H20. 

Beryllium selenide BeSe n F4Zm fee Zinc blende Fig. 4.1-131... 

Beryllium selenide BeSe a = 0.51520 (23) RT Epitaxial film, X-ray diffraction... 

Beryllium selenide is prepared from the elements in a Hg stream at 1100°C. Pure Se and pure pulverized Be are placed in a quartz reaction tube in separate boats made of AlgO or BeO, (or at least of quartz). The hydrogen should pass first over the heated Se and then, when laden with Its vapor, over the Be. A wash bottle filled with lead acetate is mounted at the exit end of the reaction tube to absorb the very toxic HgSe present in the discharged gas. The Se is heated with a Bunsen burner the uniform heat of an electric furnace is required for the Be. The BeSe so obtained often shows a tendency to crystallize in long needles. 

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