According to Vastu Shastra mor pankh is should be keep at following points.
Direction/place ----- Result
South East ----- Increasing wealth, good health and best education.
North West ----- Protection of against and fearful animal.
Shirts Pocket ----- Protection of against Krura grah such as rahu ketu etc.
Under pillow ( Children ) ----- Avoid form bad eyes rest- looking.
Books and Note Books ----- To get the best education.
If the mor pankh stick on Radha Krishnan Mukut for 41 days and worship them. After 41 days it should keep in almirah and box etc. This process is mangal suchak and beneficial for house/flat owner and other persons.