Assertion: impurity | /r/AtLocation | top region
Facets:
Source sentences:
text: Due to the experimental particularities of the Bridgman purification used in this work, the following requirements mentioned previously are not established: (1st) in the crystal growth by the Bridgman technique, the raw material needs to be fully melted previously, which is in divergence with the hypothesis number (v); (2nd) in order to promote the nucleation, the growth crucible should be, preferably, cone-shaped, disregarding the hypothesis number (ii); (3th) due to the methodology applied, at each full melting, a fraction of the impurities, located in the top region, can recirculate by the Brownian movement, thereby reducing the efficiency of purification.