Bariumoksied

Eienskappe

Algemeen

Naam Bariumoksied 
IUSTC-naam Bariumoksied
Struktuurformule van
Struktuurformule van
Chemiese formule BaO
Molêre massa 153,33 [g/mol][1]
CAS-nommer 1304-28-5[1]  
Voorkoms wit tot geel vastestof[1]
Fasegedrag  
Selkonstantes a=552pm[2]  
Ruimtegroep Fm3m 
Nommer 225  
Strukturbericht B1
Smeltpunt 1923 °C [1]
Kookpunt ~2000 °C [1]
Digtheid 5,7 g/cm3[1]
Oplosbaarheid reageer met water en los op; 38 [g/L][1] 
Brekingsindeks 2,06[3]

Suur-basis eienskappe

pKa

Veiligheid

Flitspunt nie-brandbaar[1] 
LD50 50 [mg/kg] (rot; oraal) [1]

Tensy anders vermeld is alle data vir standaardtemperatuur en -druk toestande.

 
Portaal Chemie

Bariumoksied is 'n verbinding van barium met suurstof met die formule BaO.

Kristalstruktuur

Bariumoksied kistalliseer met die haliet-struktuur,[2] wat die B1-struktuur van die strukturbericht-klassifikasie is.

Chemiese eienskappe

Bariumoksied, ook bekend as baria, is 'n geelwit higroskopiese nie-vlambare materiaal. [3]

Dit kan verkry word deur bariumnitraat te verhit:[3]

'n Ander metode is om bariumkarbonaat te kalsineer:

Om te verhoed dat bariumperoksied gevorm word, word dikwels koolstof bygevoeg, maar dit gee 'n swart produk. [3]

Bariumoksied is 'n sterk Lewisbasis wat heftig met sure kan reageer.[4]

Gebruike

Dit word gebruik as 'n deklaag vir warm katodes, in katodestraalbuise, en in die vervaardiging van sekere soorte glas, soos optiese kroonglas.[1]

Dit word ook as alternatief vir lood(II)oksied in die produksie van optiese kroonglas gebruik vanweë bariumoksied se hoë bydrae tot die brekingsindeks van glas. Ander gebruike sluit in:

  • 'n etoksileringskatalisator in die reaksie tussen alkohole en etileenoksied
  • 'n droogmiddel vir die droog van gasse en oplosmiddels. Dit het 'n bykomende voordeel dat dit nie met vog swel of nat en taai word nie.[3]

Verwysings

  1. ↑ 1,00 1,01 1,02 1,03 1,04 1,05 1,06 1,07 1,08 1,09 "Barium oxide (compound)". PubChem NIH.
  2. ↑ 2,0 2,1 Kelly, A.; Knowles, K.M. (2012). Appendix 7: Crystal Structure Data. In Crystallography and Crystal Defects. doi:10.1002/9781119961468.app7.{{cite book}}: AS1-onderhoud: gebruik authors-parameter (link)
  3. ↑ 3,0 3,1 3,2 3,3 3,4 "barium oxide". Matmatch.
  4. ↑ "barium oxide". Cameo chemicals.

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