"a peculiar aspect" is a correct and usable phrase in written English.
You can use it to describe something that is seen or experienced or to emphasize its uniqueness. Example: We all noticed the peculiar aspect of the performance that made it memorable.
The funerals had a peculiar aspect.
The pileup in pretrial detention is linked to a peculiar aspect of New York's criminal law.
They also illuminate a peculiar aspect of Wall Street's own version of a class divide.
A peculiar aspect of glass buildings is that they almost always look better when they are surrounded by something else.
He likes to be as involved in revivals as possible because a peculiar aspect of theatre is that plays ideally need to be reheard, rather than reread.
Yet, as debate in the wake of the Newtown murders revealed, there's a peculiar aspect to the argument made by partisans of gun control.
Though it's not much like any other Morris piece, "Looky" demonstrates a very peculiar aspect of the Mark Morris experience.
A very peculiar aspect of fame is that fact that strangers remember the most fleeting encounters with you; it's astonishing, really, that I remember seeing the two of them, for just a moment, so long ago.
A third peculiar aspect of the study by Sergent and Dehaene (2004) is that the T2 stimuli, of which participants had to rate the subjective visibility, were words.
A few peculiar aspects deserve discussion.
But war is most profoundly an expression of that peculiar aspect of human nature that expresses our animal origins but which also distinguishes our species from all others that struggle and fight for survival: it defines "who we are" in the search for significance in an otherwise uncaring universe.
