Nanoscale Structures and Hydrogen Storage Capacity of Fe-C-H Produced by Milling Graphite with Steel Balls in a Hydrogen Atmosphere

Table 1

The average surface distance () calculated from the peak position of the (002) peak.

Milling time (h)	(Å)
0	3.44
10	3.75
20	3.73
40	3.76
80	3.70