In pure metals, the s,p,d,... bands have different energy shifts as th
e metals are compressed. Changes that are produced in this way in the
amount of s,p,d,... type valence charge affect, e.g., the bonding prop
erties of the atoms, which in turn can lead to structural phase transi
tions at high pressures. In alloys, the band shifts can produce comple
x changes in the electronic structure. The present work deals with the
pressure-induced charge transfer in alloys. In Li-X alloys (X=Be,Na,M
g,Al,Si,P,Ca,Sr) the number of Li valence electrons is found to increa
se along with increasing pressure. This is attributed to the propertie
s of Li p states. A similar type of charge transfer is also found in A
l-X alloys (X=Ti,Zr,Hf,Cu,Ag,Au), The effects of fully occupied and pa
rtially occupied d bands can be studied by considering Al alloyed with
noble metals and transition metals. The electronic structure of the a
lloys is calculated with the linear muffin-tin orbital atomic sphere a
pproximation method. To check the magnitude of the possible computatio
nal errors involved in our results we also performed pseudopotential p
lane-wave calculations for Li-Mg alloys.