  The Purcell effect describes the modification of the spontaneous decay rate
in the presence of electromagnetic media and bodies. In this work, we shed
light on the dependencies and magnitude of this effect for chiral materials.
Using the framework of macroscopic quantum electrodynamics and Fermi's golden
rule, we study a chiral bulk medium with and without local-field corrections,
an idealised chiral mirror and a chiral surface. The results imply that the
chiral effect is greatest for large transition frequencies, molecules with
large optical rotatory strength and media with a strong cross-susceptibility.
In the case of a half space, short distances from the molecule to the interface
additionally enhance the effect.
