Table 1.

The chemical composition determined for the areas of the sample shown in Figure 2b,c.

Chemical Element	Atomic Concentration, %
	Area in Figure 2b	Spot 1 in Figure 2c	Spot 2 in Figure 2c
Sb	15.6	36.8	13.8
S	14.9	30.4	0
I	11.1	32.8	0
Ti	18.5	0	28.8
O	39.9	0	57.4