Write name, method of preparation and uses of following :

CaSO₄. 1/2 H₂O.

Name: Calcium sulphate hemihydrate or Plaster of Paris (POP)

Methods of preparation: When gypsum is heated upto 393K to produce Plaster of Paris.

Uses:

a. It is used in building construction.

b. It is mainly used to join fractured bones.

c. It is used in the formation of statues.