Absence of superconductivity in BeB2

The hexagonal BeB2 compound has been prepared and found to be paramagnetic down to 5 K. The mixed Mg1-xBexB2 (x = 0.15,0.30) system has the same T-c = 39 K as pure MgB2, indicating that Be does not replace Mg atoms in the structure. (C) 2001 Elsevier Science B.V. All rights reserved.