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The resulting intramolecular geometry is quite different from the previously established values. This is conformation that the geometry of the water molecule is by far more "normal" (i.e. closer to the free water molecule) than indicated by earlier low-resolution crystallographic work. The small, but highly significant increase of the OH(D) bond-length by some 0.02Å as found in recent high-resolution studies must be ascribed to the cooperative of the water-water interactions.
Two further experiments on the ambient pressure phase of ice have been performed.
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This difference must be due to a wider range of hydrogen bond distances (and angles) manifesting a more pronounced molecular disorder in H2O ice Ih.