The electrical
impedance can be calculated: :Z_{CPE}=\frac{1}{Y_{CPE}}=\frac{1}{Q_0\omega^n}e^{-\frac{\pi}{2}ni} where the CPE
admittance is: Y_{CPE}=Q_0(\omega i)^n and Q0 and n (00 = 1/|Z| at ω = 1 rad/s The constant phase is always −(90*n)°, with n from 0 to 1. The case n = 1 describes an ideal capacitor while the case n = 0 describes a pure
resistor. ==References==