Crystal Structures of V-Fe Alloys as Determined by the Mössbauer Effect inFe57

We have measured Mössbauer absorption by ${\mathrm{Fe}}^{57}$ in vanadium-rich V-Fe alloys in the composition range from 0-50 at.% Fe and have interpreted our results in terms of structural features. The literature on the V-Fe system does not suggest the existence of ordering in samples quenched from high temperatures, and x-ray diffraction patterns for our own V-Fe samples include only the lines characteristic of a disordered (bcc) lattice. However, the Mössbauer results can be understood only if a CsCl-like ordering exists over the range of compositions from about 15 to 50 at.% Fe.