Is Apatite a safe material to be used on air purifier filters?

Apatite is a group name for hexagonal or pseudohexagonal monoclinic arsenates, phosphates and vanadates.
In general use ‘apatite’ is often used in particular for the Calcium Phosphate minerals, Fluorapatite, Chlorapatite and Hydroxylapatite.
There is no specific data on health dangers or toxicity for this mineral.
It is unlikely that an arsenate would be used in this application. The other forms are quite prevalent and more of these are actually mined as ore.