Graphite [C]

Structure Hexagonal
Space Group  P63mc (No. 186)
a= 2.4700 Å, b=2.4700 Å, c=6.7900 Å
a=b=90.00, g=120.00
Z=4

Atomic Positional Parameters
C1 2a 0.0000 0.0000 0.0000
C2 2b 0.3333 0.6667 0.0050

Reference
O. Hassel (1924) Zeitschrift fuer Physik, 25 317 