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Thermal motion is the inherent driving force of crystal substances formation. In borates, carbonates and nitrates such an organizing force are the strong anisotropy of thermal vibrations of atoms in the TO3 triangles (T = B, C, N), flat triborate and other B–O rigid groups containing TO3 triangles. These triangles and rigid groups, due to the sharp anisotropy of thermal vibrations, tend to be arranged...
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