Surface Atomic Structure of KDP Crystals in Aqueous Solution: An Explanation of the Growth Shape

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.80.2229· OSTI ID:579964

de Vries, S A; Goedtkindt, P; Huisman, W J; Zwanenburg, M J; Vlieg, E ^[1]; Goedtkindt, P ^[2]; Bennett, S L ^[3]; Smilgies, D ^[4]; De Yoreo, J J ^[5]; van Enckevort, W J; Bennema, P ^[6]

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1. FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam (The Netherlands)
2. Universitaire Instelling Antwerpen, Department of Chemistry, Universiteitsplein 1, B-2610 Wilrijk (Belgium)
3. CCLRC, Daresbury Laboratory, Warrington WA4 4AD (United Kingdom)
4. European Synchrotron Radiation Facility, B.P. 220, 38043 Grenoble Cedex (France)
5. Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States)
6. RIM, Department of Solid State Chemistry, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen (The Netherlands)

With this study on KDP, we present an interface atomic structure determination of a crystal in contact with its growth solution. Using x-ray diffraction at a third-generation synchrotron radiation source, the structure of both the {l_brace}101{r_brace} and {l_brace}100{r_brace} faces has been determined. We found that the {l_brace}101{r_brace} faces are terminated by a layer of K{sup +} ions and not by H{sub 2}PO{sup {minus}}{sub 4} groups, resolving a long-standing issue that could not be predicted by theory. This result leads to an atomic-scale explanation of the influence of metal impurities on the macroscopic growth morphology. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 579964
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
CRYSTALS
GROWTH
LAWRENCE LIVERMORE NATIONAL LABORATORY
POTASSIUM PHOSPHATES
STRUCTURAL CHEMICAL ANALYSIS
STRUCTURE FACTORS
SURFACES
SYNCHROTRON RADIATION
X-RAY DIFFRACTION