On the Dubious Existence of a Second Na,Pb Phase (XaS1Pbd)l BY DAVID1'. SHOEMAKER, SORMAN E. WESTONAXD J@RGEN RATHLEV RECEIVED APRIL 9, 1955
The crystal structure of a phase of composition NalbPb4 was reported in 1936 by Zintl and Harder2 (hereinafter designated 2 and H). It has a bodycentered cubic lattice, with an = 13.29 kX. ( = 13.32 -X.'I, with 16 Pb atoms and 00 Na atoms per unit cube. However, it was claimed previously by Stillwell and Robinson3 (hereinafter designated S and I
