March, 1946
NOTES
Four alloys of compositions immediately surrounding the Mg4Na4Pb3 peak in the ternary diagram were analyzed thermally in order to define the compound region; the experimental data are given below.
which appeared to be the desoxyxyloin (11).
52 1
OH
I
OH
I
XylCH-CHXyl I
XylCOCHzXyl
I1
THERMAL ANALYSIS OF Mg4Na4Pb3REGIONOF Mg-Na-Pb SYSTEM
_~____-
m
Na
Atom % a
Pb
-PrimaryTemp.,
C.
Time, min.
Temperature breaks ---SecondaryTemp., Time, OC. min.
--TertiaryTemp., O C .
-. Time, min.
36.36 36.36 27.27 (Mg4NaaPb3) 600.7 23 383.8 < lb 37.50 37.50 25.00 (Mg&a3Pbz) 589.8 7 559.9 7 35.00 35.00 30.00 (Mg,Na?Pbe) 583.0 9 476.8 3 407.9
