Can't access Particles/StandardUnit shader using code

*** Sorry! *** I realised straight after posting this that it’s “Unlit”, not “Unit”. Dumb me.

I’m trying to access the Particles/StandardUnit shader in a script but it isn’t working for me. I’m using this line of code…

Material mat = new Material(Shader.Find("Particles/StandardUnit"));

It gives this error…

ArgumentNullException: Value cannot be null.
Parameter name: shader

I can use the Particles/StandardUnit shader in the Inspector and get at other shaders using code, so I’m stumped as to what could be causing this.