Parametric x-ray radiation (PXR) from a mosaic pyrolytic graphite crystal is studied using a 5.7 MeV electron beam. The first-order (002) PXR reflection is detected in the Bragg angle, with the emitted photon energies peaking around 8MeV. The detection angle Theta(D)=2Theta (B)=27degrees with respect to the e-beam, where Theta(B) is the Bragg angle. The target is 0.3 mm thick, and the PXR spectra are measured for different tilt angles between'the target and the e-beam direction.