1.
Acta Crystallogr B Struct Sci Cryst Eng Mater
; 79(Pt 6): 495-509, 2023 Dec 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-37934491
RESUMO
The crystal structure of potassium guaninate hydrate, K+·C5H4N5O-·H2O, was studied in the pressure range of 1â atm to 7.3â 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+·C5H3N5O2-·7H2O under hydrostatic compression and on cooling. A polymorphic transition into a new, incommensurately modulated, phase was observed at â¼4-5â GPa. The transition was reversible with a hysteresis: the satellite reflections disappeared on decompression to â¼1.4â GPa.