The gas atomized powders of the Fe-TM-Nd-REM-B system have a hydrogen absorption capacity of the same order as that of a cast alloy of identical chemical composition. This paper presents a theoretical explanation of a value of tetrahedral pores in the lattice of Fe14Nd2B phase. In the volume of these pores we selected the polyhedrons. Their distribution explains sorption capacity, kinetics to sorption and symmetry of distorting a lattice of Fe14Nd2B phase during the absorption of hydrogen. We have found that a cyclical hydride processing of the GAP raises the residual magnetic induction of magnetoplasts produced from them. This occurs as a consequence of hydrogen embrittlement of GAP. Disintegration of powder during production of magnetoplasts brings about such consequences. The GAP (in contrast to powder obtained by mechanical size reduction) have a more pronounced effect of form preservation during a cyclical hydride processing.