  The relatively low Tc of Bi2Sr2CuO6+D allows to study normal-state down to
low temperatures and the non-substituted compound is intrinsically strongly
overdoped. Hole concentration can be adjusted trough oxygen excess, but few
data exist in the literature about the quantitative control of D. The
synthesis, achieved in air by solid-state reaction, needs long-time annealing
to obtain pure phase with stoichiometric cationic ratios. Thermogravimetric
techniques were used to explore oxygen non-stoichiometry. Absolute oxygen
content was determined by reduction with hydrogen, while the oxygen exchange
was studied between 300 C and 670 C with different PO2. Oxygen excess varies
between 0.14 and 0.18, with possibly two regimes of oxygen intercalation. These
results are compared to Bi-2212.
