Abstract
Single crystals of 2201 phase with various superconducting transition temperatures ranging from nonsuperconducting to 110K have been obtained. An X-ray structural study of tetragonal single crystals with T c = 110 K, space group 14/mmm, a = 3.8686(3), c = 23.259(3) Å, has been carreid out. We have found that thallium atoms are partially replaced by copper atoms. We have also found that Tl atoms and O(3) atoms linked with Tl are displaced from their symmetrical sites. A correlation between the structure and properties of Tl-2201 cuprate crystals has been established on the basis of our data and the data reported in the literature.
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