An. Christensen et al., SUPERCONDUCTING CUPRATES AND RELATED OXIDES .7. SELF-NUCLEATION AND TOP SEEDED CRYSTAL PREPARATION OF CUPRATES, Acta chemica Scandinavica, 50(11), 1996, pp. 979-984
Cobalt doped single crystals of YBa2Cu3O7-delta and single crystals of
PrBa2Cu3O7-delta were grown in alumina crucibles from a BaO-CuO flux.
The composition of the crystals were determined by microprobe analysi
s and from neutron single crystal diffractometry. Crystal A: YBa2Cu2.7
1(2)Al-0.10(1)Co-0.15(1)O-6.51(4). Space group P4/mmm (No. 123), a = 3
.873(1), c = 11.704(2) Angstrom. Crystal B: PrBa2Cu2.75(3)Al-0.10(1)O-
6.64(10). Space group P4/mmm (No. 123), a = 3.921(1), c = 11.757(2) An
gstrom. (C) Acta Chemica Scandinavica 1996.