Incommensurately modulated structure of Zn₄Si₂O₇(OH)₂·H₂O at high pressure.

ABSTRACT: High-resolution single-crystal X-ray diffraction experiments on Zn₄Si₂O₇(OH)₂·H₂O hemimorphite were conducted at high pressure using diamond anvil cells at several different synchrotron facilities (ESRF, Elettra, DESY). Experimental data confirmed the existence of a previously reported phase transition and revealed the exact nature of the incommensurate modulation. We report the incommensurately modulated structure described in the (3+1)D space group Pnn2(0, β, 0)000. We have determined the modulation mechanism, which involves the fluctuation of atoms between two main positions, occurring mainly along the [100] direction, perpendicular to the modulation vector. Moreover, our results reveal that the phase transition occurs at lower pres

SUBMITTER: Gajda R 

PROVIDER: S-EPMC11707689 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature