Sixtyseven structure factors for a spheroidal, single crystal of diamond (m
ax diam = 0.052 cm, min diam = 0.040 cm) were measured by XRD with synchrot
ron radiation and lambda = 0.4 Angstrom. The data were corrected for isotro
pic extinction from measurements taken with lambda = 0.7 Angstrom. The whol
e sphere of reflections, up-to a resolution of 0.27 Angstrom, was observed.
The esd's of the structure factors were of the order of 0.006 e/atom and 0
.002 e/atom for the low (except 111) and high order reflections, respective
ly. Despite of the large size of the specimen, the observed data agreed bet
ter with published theoretical structure factors than previous experimental
structure factors. It is the first complete XRD single crystal data-set si
nce 1939.