  We present a method for the exact construction of the fully particle-hole
symmetric PH-Pfaffian ground state and its charged excitations on a sphere. We
adopt the Moore-Read state, but with a nonholomorphic pairing component as in
previous studies, and project it to the lowest Landau level. We study the
energetics as well as other properties of these states and find that in a pure
system interacting with the Coulomb forces the PH-Pfaffian cannot compete with
either the Moore-Read state or its particle-hole conjugate, the anti-Pfaffian
state, as an explanation for the 5/2-effect.
