抄録
Structure analysis of a slightly partially-dehydrated natural chabazite was carried out using single crystal X-ray diffraction. The presences of the five water sites and four exchangeable-cation sites, found in the fully hydrated sample investigated by our recent study (Nakatsuka et al., 2007), were also confirmed in the present partially dehydrated sample. The final structure refinement converged to R = 0.0280 and Rw = 0.0284 for 926 reflections. The occupancy of the water site located at the center of the 8-ring window in the [412 62 86]-cavity decreases significantly compared with that in the fully hydrated sample.
