A study was made of the behavior, under uniaxial stress, of the local vibrational mode which was due to Mn-H complexes. This showed that the complex was trigonal, and that its structure was the same as that of group-II shallow acceptor-H complexes. The local vibrational mode of the complex exhibited a strongly non-linear behavior under a uniaxial stress, with no direct evidence for any additional structure.

B.Clerjaud, D.Côte, A.Lebkiri, A.Mari: Materials Science Forum, 1995, 196-201, 975-80