अंतराकाशी यौगिक क्या हैं? इस प्रकार वेफ यौगिक संक्रमण धातुओं के लिए भली प्रकार से ज्ञात क्यों हैं?

Transition metals are large in size and contain lots of interstitial sites. Transition elements can trap atoms of other elements (that have small atomic size), such as $H , C , N ,$ in the interstitial sites of their crystal lattices. The resulting compounds are called interstitial compounds.