Crystal Data for Pb7Bi3, a Superconducting ε-Phase in the Pb-Bi System

Abstract The ε-phase is hexagonal, space group P6 3 /mmc. For the composition Pb 7 Bi 3 the following data were determined, a = 3.5058(1) Å c = 5.7959(5) Å, Vol. = 61.687 Å 3 (5), D c = 11.17 Mg m −3 . Filings from single crystal material were used to obtain powder data by the Guinier method and the X-ray results were in accordance with single crystal neutron diffraction data. Transition to the superconducting state took place in the interval 8.3 K–8.55 K.