  We present high resolution high energy and resonant x-ray diffraction results
from La2-2xSr1+2xMn2O7 for x=0.55,0.575 and 0.60. These compounds show
superlattice reflections at wavevectors of (h+-\delta,k+-\delta,l) and
(h+-2\delta,k+-2\delta,l), arising from orbital ordering with associated
Jahn-Teller distortions and charge ordering respectively. We observe a phase
transition between the x=0.55 and x=0.575 doping levels. Samples with x=0.55
display structural characteristics similar to those previously reported for
x=0.5. Compared to this, the long range order in samples with x=0.55 and x=0.6
have a distinct change in wavevector and correlation. We attribute this to a
new orbital bi-stripe phase, accompanied by weak, frustrated, charge ordering.
The observed azimuthal dependence of the orbital order reflections supports the
model proposed for this new phase.
