INTERMETALLIC COMPOUNDS BETWEEN LITHIUM AND LEAD I. THE STRUCTURES OF Li3Pb AND L.i7Pb2

摘要

The crystal structures of Li3Pb and Li7Pb2 have been determined. The Li3Pb cell is face-centered cubic with a = 6.687 A;the Li7Pb2 cell is hexagonal with a - 4.751 A and c = 8.589 A. Two other compounds with Li/Pb mole ratios of approximately 2.5 and 4.0 have been characterized by cooling-curve data and by x-ray diffraction patterns. The arrangement of the atoms in Li3Pb is similar to that in lithium metal with the appropriate number of lithium atoms replaced by lead atoms;Li7Pb2 has a similar but slightly modified arrangement.