X. Zhang et al., A COMPARATIVE-STUDY OF THE PRESSURE-INDUCED STRUCTURAL-CHANGES IN YBA2CU4O8 AND YBA2CU3O7-X, Journal of physics and chemistry of solids, 56(2), 1995, pp. 153-158
A correlation of the distance Cu(2)-Cu(2) with dT(c)/dP is established
for YBa2Cu4O8 and YBa2Cu3O66. This model yields dT(c)/dP = 5.07 K GPa
-1 for YBa2Cu4O8 and dT(c)/dP = 4.65 K GPa-1 for YBa2Cu3O6.6, both of
which are in excellent agreement with the experimental data. It is als
o found that YBa2Cu3O6.6 has similar pressure-induced structural chang
es as YBa2Cu4O8, but different from YBa2Cu3O6.93.