Assertion: head's structure | /r/HasProperty | the cause of the iridescence
Facets:
Source sentences:
text: In the case of the Kaiser-i-Hind (Teinopalpus imperialis), the three-dimensional photonic structure has been examined by transmission electron tomography and computer modelling to reveal naturally occurring "chiral tetrahedral repeating units packed in a triclinic lattice", the cause of the iridescence.