Assertion: metal's structure | /r/HasProperty | simple
Facets:
Source sentences:
text: With nitrogen, carbon forms an extensive series of nitride compounds including those with high N:C ratios, and with structures that are simple (CN 12 ); chain-like (C 6 N 2 for example); graphitic (linked C 6 N 7 units); fullerenic (C 48 N 12 ) or polymeric (C 3 N 3 units).