Crystal structure study of ice from the Dome Fuji ice core by the X-ray diffraction reciprocal mapping measurements

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X-ray diffraction reciprocal space mapping measurements were conducted to investigate the crystal structure of ice of the Dome Fuji ice core. The broadening of the rocking curve of the ice crystals was caused by the dislocations introduced during the ice sheet flow. The dislocation density decrease with the increasing depth. The lattice constant c of ice is larger than that of the laboratory ice and decreases with the increasing depth while the lattice constant a is only slightly larger than that of the laboratory and increases a little with the increasing depth. These can be attributed to micro bubbles in the ice samples.