Assertion: silicon atom | /r/HasProperty | located over a nitrogen atom
Facets:
value: in the adjacent layer
type: LOCATION
value: directly
type: MANNER
Source sentences:
text: The hexagonal form, similar to graphite, has a layered structure with planar, six-membered rings of alternating boron and nitrogen atoms stacked in such a way that a boron atom in one layer is located directly over a nitrogen atom in the adjacent layer.