The temperature dependence of transport coefficients is theoretically exami
ned for Al-Cu-Fe phases. We investigate the electronic conductivity, the th
ermoelectric power, the Hall coefficient, the thermalconductivity, and the
Lorenz number. The spectral dependence of the resistivity is modeled by mea
ns of a wide and a narrow Lorentzian in accordance with results of ab initi
o calculations (LMTO-ASA, Kubo-Greenwood formula). This model extracts thos
e properties from the ab initio results which are indispensables to consist
ently explain the transport coefficients mentioned above. Sub-diffusive tra
nsport is found in our ab initio results. The validities of both the Matthi
essen rule and the Wiedemann-Franz law are analyzed. We generalize to the b
ulk quasicrystal where the narrow Lorentzian is found to become more pronou
nced than in the (1/1) approximant. (C) 2001 Elsevier Science B.V. All righ
ts reserved.