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Where are Protons and Deuterons in KHpD1–pCO3? A Neutron Diffraction Study
2008
Zeitschrift fur physikalische Chemie (Munchen. 1991)
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The crystals of potassium hydrogen carbonate (KHCO3) and the KDCO3 analogue are isomorphous. They are composed of hydrogen or deuterium bonded centrosymmetric dimers (HCO3-)(2) or (DCO3-)(2). The space group symmetry of KHpD1-pCO3 (p approximate to 0.75) determined with neutron diffraction is identical to those of KHCO3 and KDCO3. This is at variance with a random distribution of H and D nuclei. These crystals are macroscopic quantum systems in which protons or/and deuterons merge into macroscopic states.
doi:10.1524/zpch.2008.5388
fatcat:y5b2d7sgd5hbjd7iu3q73e7fki