Incommensurately modulated structure of Zn4Si2O7(OH)2·H2O at high pressure
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 transit...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Union of Crystallography
2025-01-01
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| Series: | IUCrJ |
| Subjects: | |
| Online Access: | https://journals.iucr.org/paper?S2052252524011060 |
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| Summary: | 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 pressure than previously reported. |
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| ISSN: | 2052-2525 |