Silicide hydride
A silicide hydride is a mixed anion compound that contains silicide and hydride anions. The hydrogen is not bound to silicon in these compounds. These can be classed as interstitial hydrides, Hydrogenated zintl phases, or Zintl phase hydrides. In the related silanides, SiH3− anions or groups occur. Where hydrogen is bonded to the silicon, this is a case of anionic hydride, and where it is bonded to a more complex anion, it would be termed polyanionic hydride.
Silicide hydrides may be prepared by heating a Zintl phase or metal silicide under hydrogen pressure, of perhaps 20 atmospheres.