Phosphorus pentafluoride ($\mathrm{P}{\mathrm{F}}_5$)

$\mathrm{P}{\mathrm{F}}_5$ is trigonal bipyramidal at its equilibrium minimum. Its twelve small-amplitude vibrational coordinates transform as $2A_1\prime +3E\prime +2A_2\prime \prime +E\prime \prime$ under D3h.