Ten years of Soviet-Hungarian cooperation in the field of electron diffraction research of molecular structure. 2. Pt

The review is given of joint Soviet-Hungarian scientific works published for the 1958-1976 period in the field of electron diffraction examination of molecular structures. One of important directions of Soviet-Hungarian works is the study of hardly volatile tungsten oxide structures which represent at the temperature 1400 deg C polymers (WO3)sub(n). Parameters of trimer and tetramer molecules, valence angles in the WO4 fragment in molecules (WO3)3 and (WO3)4 are near to tetrahedral angles