The electronic- and ionic conductivity, the TEC, and the expansion on reduction of a number of co-doped lanthanum chromites were determined using dilatometry, high-temperature X-ray-diffraction, and four point steady state and transient conductivity measurements. The samples were further characterized by thermogravimetry. The study addresses co-doped chromites with focus on the three compositions: La_(0.8)Sr_(0.2)Cr_(0.8)7Fe_(0.1)V_(0.03)O_3, La_(0.9)Sr_(0.1)Cr_(0.87)Mg_(0.1)V_(0.03)O_3 and La_(0.8)Sr_(0.2)Cr_(0.97)V_(0.03)O_3. Their properties are compared to those of materials from the series: La_(1-x)Sr_xCr_(1-x)Mg_zV_(0.03)O_3. The differences in behavior are discussed in terms of simple structural models based on Shannon ionic radii.
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