A high-pressure single-crystal X-ray diffraction study of potassium guaninate hydrate, K + ·C 5 H 4 N 5 O - ·H 2 O.
Anna A GaydamakaSergey V RashchenkoAnna I SemerikovaEkaterina S SmirnovaAnna G IvanovaSergey G ArkhipovBoris A ZakharovNikita E BogdanovElena V BoldyrevaPublished in: Acta crystallographica Section B, Structural science, crystal engineering and materials (2023)
The crystal structure of potassium guaninate hydrate, K + ·C 5 H 4 N 5 O - ·H 2 O, was studied in the pressure range of 1 atm to 7.3 GPa by single-crystal diffraction using synchrotron radiation and a laboratory X-ray diffraction source. Structural strain was compared to that of the same salt hydrate on cooling, and in 2Na + ·C 5 H 3 N 5 O 2- ·7H 2 O under hydrostatic compression and on cooling. A polymorphic transition into a new, incommensurately modulated, phase was observed at ∼4-5 GPa. The transition was reversible with a hysteresis: the satellite reflections disappeared on decompression to ∼1.4 GPa.