The chemical constituent is slowly removed from the primary reactant by the reaction of the chemical constituent vapor with a secondary reactant, spatially separated from the primary reactant, in a closed volume under {HEAD ~ uniaxial pressure} and heat to form {TAIL ~ the single phase pure crystals} 
to form
The chemical constituent is slowly removed from the primary reactant by the reaction of the chemical constituent vapor with a secondary reactant , spatially separated from the primary reactant , in a closed volume under { HEAD ~ uniaxial pressure } and heat to form { TAIL ~ the single phase pure crystals }
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