Table 2. Number of scans per each sample and of the related extracted sub-areas.

Sample reference	Number of scans	Extracted sub-areas– 50x50 μm
VSH4-1	4	8
VSH4-2	5	10
VSH4-3	3	6
VSH4-4	2	4
VSH4-5	5	10
VSH4-6	5	10
VSH4-7	1	2
A3-1	2	4
A3-2	3	6
A3-4	3	6
A3-5	3	6
A3-6	3	6
	TOT = 39	TOT = 78