The mean-square amplitudes of vibration in graphite based on an X-ray charge-density analysis are 0-0032 (2) and 0.0140 (3) /k 2 parallel to and perpendicular to the basal plane, respectively. Values for the parallel vibrations of 0-0031 (6) and 0.0032 A, 2 were derived from temperature-dependent neutron measurements and a calculated phonon spectrum. The neutron measurements and the phonon spectrum both predict lower values 10.0090 (20) and 0.0098 ,~,21 for the out-of-plane vibrations. This small discrepancy may be caused by small changes in the core atomic scattering factors from the free-atom values or by a deficiency in the phonon-spectrum model.