On extending Miedema's model to predict hydrogen content in binary and ternary hydrides

While originally formulated to predict the enthalpy of formation, Miedema's model for metal hydrides is also capable of predicting hydrogen content. In the case of binary AH(x) hydrides this is straightforward. For ternary AB,,H, hydrides extension of the model to arbitrary hydrogen content x is required. An ansatz, for doing so is proposed which also extends the model to arbitrary B:A ratio 11 while preserving Miedema's original prescription for n = 1, 2, 3, 5. Results are reported for all known solid binary hydrides and for a variety of ternary systems. (C) 2002 Elsevier Science B.V. All rights reserved.