Table 5.

Comparison of SAD ring pattern from region C of Fig. 8 with JCPDS pattern [16]^a

Experimentally determined d (nm)	JCPDS value of d for Wcx (nm)	hkl	Ratio d (exper.)/d (JCPDS)
b	0.461	200
b	0.415	112
b	0.401	103
b	0.348	210
0.246±0.004c	0.2455	222	1.00
0.228±0.004c	0.2283	400	1.00
0.197±0.004c	0.2001	410	0.98
0.144±0.004c	0.1416	208	1.02
0.133±0.004c	0.1309	700;350	1.02
0.124±0.004c	0.1228	256	1.01

^aThose reflections corresponding to silver (the high-resolution TEM lattice standard) are excluded; but all others are reported in this table.

^bIt was not possible to observe reflections with indices lower than 222, since they were obscured by the graphite 002 reflections.

^cThe expanded uncertainty U = 2u_c in the measured d-spacings was calculated from the standard deviations in the camera constant and in the measurement of the diameters of the experimental rings. The mean and the standard deviation of the camera constant were determined from five measurements each of the diameters of the first seven rings in a SAD pattern from a microcrystalline aluminum standard. The mean and standard deviation of the SAD rings of the experimental sample were determined from three to five measurements of the diameters.