A new series of 1223-type (T1,Cr)-based cuprates, (T1,Cr)(Sr,Ba)2Ca2Cu
3Oz, have been successfully synthesized and identified by powder x-ray
diffraction and electron diffraction analyses. Ba partial substitutio
n for Sr promotes the formation of (T1,Cr)-based 1223-type compounds.
Nominal samples, (Tl1-xCrx)-(Sr2-yBay) Ca2Cu3Oz, with 0.15 less-than-o
r-equal-to x less-than-or-equal-to 0.50 and 0.50 less-than-or-equal-to
y less-than-or-equal-to 1.50 are pure or nearly pure 1223 phase and e
xhibit T(c)(rho=0) in the range of 104-114 K. This new (Tl,Cr)-based h
igh-T(c) material may be of importance in practical applications.