Americium place in actinoid series and prediction of transamericium metal properties

The main properties of the metal americium are systematized. They are brought into comparison with rare-earth and actinoid metal properties. On the base of the comparison results and analysis of variation in rare-earth and actinoid metal properties for each of those metals a new parameter-index of anomalism- is introduced for correlation of crystalline and electronic structures of those metals. Considering the plotted curves of anomalism the available in literature data on curium, berkelium and californium crystal structures and discussed. The structures of the last actinoid metals are predicted too. The results are compared with the other phenomenological models data