  We have investigated the effect of Zn substitution on the hole content, p,
and the oxygen deficiency, d, for a series of high-quality crystalline c-axis
oriented thin films and polycrystalline Y1-xCaxBa2(Cu1-yZny)3O7-delta compounds
over a wide range of composition (x, y, and delta). p was determined from the
room-temperature thermopower, S[290K]. When annealed at a given temperature and
oxygen partial pressure, a small but systematic variation in S[290K] was
observed with Zn, for all the samples. From the analysis of the temperature
derivative of resistivity, drho/dT, at 300K, which varies almost linearly with
p, irrespective of the composition of the sample, and the thermo-gravimetric
analysis (TGA), we have found that annealing under identical conditions makes
the Zn-substituted compounds somewhat more oxygen deficient compared to the
Zn-free ones.
