Beryllium sulfide

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. 

The use of radius ratios to rationalize structures and to predict coordination numbers may be illustrated as follows.27 Consider beryllium sulfide, in which rn,a /r5i- = 59 pm/170 pm = 0.35. We should thus expect a coordination number of 4 as the Be2+ ion fits most readily into the tetrahedral holes of the closest packed lattice, and indeed this is found experimentally BcS adopts a wurtzite structure. 

Berylliui.i silicate (BegSiu ) Beryllium sulfate, alplia (BeSO ) Beryllium sulfate, beta (BeBO ) Beryllium sulfate, garniia (beSO ) Beryllium sulfide (Bet>)... 

Beryllium sulfide may be prepared either by (I) synthesis from the elements, (II) reaction of the chloride with HgS (which, however, does not yield chlorine-free material), or (HI) fromBeSO or BeO. 

Beryllium sulfide may also be obtained by reaction of CSg with BeO at temperatures above 1200°C. 

Beryllium oxide Beryllium sulfide Beryllium selenide Beryllium telluride... 

Beryllium sulfide BeS The electrical conductivity of polycrystalUne BeS disks was found to be p-type. This is attributed to Be vacancies or S interstitials... 

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