WHAT IS VAN ARKEL METHOD FOR REFINING ZIRCONIUM OR TITANIUM??? PLZZZ ANSER IT ...........

The method is described by another expert at:

https://www.meritnation.com/ask-answer/question/describe-a-method-for-refining-ti/general-principles-and-processes-of-isolation-of-elements/4047071

The reactions occurring are:

Crude metal is heated with iodine in an evacuated vessel to separate from impurities:

Ti + 2I₂ ------> TiI₄

this decomposes at 1800K to give Pure Ti metal and iodine.

TiI₄ ---------->  Ti + 2I₂