V O L U M E 22, NO. 7, J U L Y 1 9 5 0 a
955 The melt solidifies spontaneously and rapidly ~ i t hlarge gas bubbles showing a terracelike structure. Many of the larger areas of uniform orientation show an off-center arute birer interference figure with 2E = 113", 2 H = 67" I ' characteristic of R D X (11). Usually, honevv~, 1 pears showing centered acute bisectrix or off-cwitoi 'll)ric i figures with 2E = 92', 2V = 53", r > ii ( - j.
a
I
I
j
RDX (11)
Figure 2. Orthoof graphic Typical Projection Crystal
b - > +
