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Potassium sodium (2R,3R)-tartrate tetra-hydrate: the paraelectric phase of Rochelle salt at 105 K.

Görbitz CH, Sagstuen E - Acta Crystallogr Sect E Struct Rep Online (2008)

Bottom Line: Rochelle salt, K(+)·Na(+)·C(4)H(4)O(6) (2-)·4H(2)O, is known for its remarkable ferroelectric state between 255 and 297 K.The current investigation, based on data collected at 105 K, provides very accurate structural information for the low-temperature paraelectric form.Unlike the ferroelectric form, there is only one tartrate molecule in the asymmetric unit, and the structure displays no disorder to large anisotropic atomic displacements.

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ABSTRACT
Rochelle salt, K(+)·Na(+)·C(4)H(4)O(6) (2-)·4H(2)O, is known for its remarkable ferroelectric state between 255 and 297 K. The current investigation, based on data collected at 105 K, provides very accurate structural information for the low-temperature paraelectric form. Unlike the ferroelectric form, there is only one tartrate molecule in the asymmetric unit, and the structure displays no disorder to large anisotropic atomic displacements.

No MeSH data available.


: Crystal packing arrangement viewed approximately along the c axis. H atoms bonded to C have been left out for clarity. Na+ is yellow, K+ is light blue with K1 at the centre of the unit cell and K2 at the cell edge. Hydrogen bonds are shown as black dotted lines while ligand coordination is indicated in orange for three selected metal ions. The arrow points to H31W, which is involved in a four-center hydrogen bond.
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Fap2: : Crystal packing arrangement viewed approximately along the c axis. H atoms bonded to C have been left out for clarity. Na+ is yellow, K+ is light blue with K1 at the centre of the unit cell and K2 at the cell edge. Hydrogen bonds are shown as black dotted lines while ligand coordination is indicated in orange for three selected metal ions. The arrow points to H31W, which is involved in a four-center hydrogen bond.


Potassium sodium (2R,3R)-tartrate tetra-hydrate: the paraelectric phase of Rochelle salt at 105 K.

Görbitz CH, Sagstuen E - Acta Crystallogr Sect E Struct Rep Online (2008)

: Crystal packing arrangement viewed approximately along the c axis. H atoms bonded to C have been left out for clarity. Na+ is yellow, K+ is light blue with K1 at the centre of the unit cell and K2 at the cell edge. Hydrogen bonds are shown as black dotted lines while ligand coordination is indicated in orange for three selected metal ions. The arrow points to H31W, which is involved in a four-center hydrogen bond.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2960997&req=5

Fap2: : Crystal packing arrangement viewed approximately along the c axis. H atoms bonded to C have been left out for clarity. Na+ is yellow, K+ is light blue with K1 at the centre of the unit cell and K2 at the cell edge. Hydrogen bonds are shown as black dotted lines while ligand coordination is indicated in orange for three selected metal ions. The arrow points to H31W, which is involved in a four-center hydrogen bond.
Bottom Line: Rochelle salt, K(+)·Na(+)·C(4)H(4)O(6) (2-)·4H(2)O, is known for its remarkable ferroelectric state between 255 and 297 K.The current investigation, based on data collected at 105 K, provides very accurate structural information for the low-temperature paraelectric form.Unlike the ferroelectric form, there is only one tartrate molecule in the asymmetric unit, and the structure displays no disorder to large anisotropic atomic displacements.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
Rochelle salt, K(+)·Na(+)·C(4)H(4)O(6) (2-)·4H(2)O, is known for its remarkable ferroelectric state between 255 and 297 K. The current investigation, based on data collected at 105 K, provides very accurate structural information for the low-temperature paraelectric form. Unlike the ferroelectric form, there is only one tartrate molecule in the asymmetric unit, and the structure displays no disorder to large anisotropic atomic displacements.

No MeSH data available.