| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1516996 | Journal of Physics and Chemistry of Solids | 2010 | 5 Pages |
Abstract
We have used synchrotron X-ray diffraction to investigate the structural and chemical changes undergone by polycrystalline KH2PO4 (KDP) upon heating within the 30–250 °C temperature interval. Our data show evidence of a polymorphic transition at T∼190 °C from the room-temperature tetragonal KDP phase to a new intermediate-temperature monoclinic KDP modification (spacegroup P21/m and lattice parameters a=7.590, b=6.209, c=4.530 Å, and β=107.36°). The monoclinic RDP polymorph remains stable upon further heating to 235 °C, and is isomorphic to its RbH2PO4 and CsH2PO4 counterparts.
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Authors
Cristian E. Botez, David Carbajal, Venkata A.K. Adiraju, Ronald J. Tackett, Russell R. Chianelli,