Citation: Hewat, A.W.; Capponi, J.J.; Marezio, M.; Chaillout, C.; Hewat, E.A.jr. (1987). Structures of superconducting Ba2 Y Cu3 O7-d and semiconducting Ba2 Y Cu3 O6 between 25 centigrade and 750 centigrade. Solid State Communications, 64, pp. 301-307.