Explanatory notes
… hydride is calcium hydride (CaH 2 ) (hydrolith) obtained by direct combination of its elements; white masses with a … sodium, potassium, strontium, antimony, nickel, titanium, zirconium, tin, lead, etc. This heading does not include … compositions. (4) Magnesium, antimony, manganese, and iron borides, etc . This heading does not include compounds …