Dear Syed,
you may wish to look at the following papers reporting on the crystal
structures of the Rochelle salt (potassium-sodium tartrate).
The link for downloading the data is
https://www.ccdc.cam.ac.uk/structures/Search?Compound=rochelle&DatabaseToSearch=Published
Acta Cryst. (2024). B80, 94-104
https://doi.org/10.1107/S205252062400115X
IUcrJ
https://doi.org/10.1107/S2052252514022155
Acta Cryst E
https://doi.org/10.1107/S1600536808005266
J Solid State Chemistry
https://doi.org/10.1006/jssc.1997.7394
Y.Iwata, S.Mitani, I.Shibuya,
Ferroelectrics, 1989, 96, 215
Z.Morlin, B.Jeszenszky, E.Hartmann, L.Malicsko, A.Peter,
Krist.Tech., 1978, 13, K50
Proceedings of the Royal Society of London. Series A, Mathematical and
Physical Sciences, 1941, 177, 251,
DOI: 10.1098/rspa.1941.0010
W.Bronowska, K.Lukaszewicz,
Bulletin de l'Academie Polonaise des Sciences, Serie des Sciences
Chimiques, 1979, 27, 121
Analytical Chemistry
DOI: 10.1021/acs.analchem.7b00443
I am afraid, my impression is that diffraction picture is likely to
correspond to Rochelle salt.
Good luck
Doriano
Il 2025-01-31 07:58 syed ibrahim ha scritto:
Hi All
I have a protein crystal (thin plate crystal) diffracted to high
resolution. The crystallisation condition is 200mM Pottasium sodium
tartarate and 20% Peg 3350. Protein molecular weight is 35 kDa. I
could see the reflection spots near 1.9A.
The problem is, I could not process the images. I see very low number
of spots at low resolution. So I doubt whether the diffraction is from
protein or from Pottasium sodium tartarate.
Any suggestions,
Thanks
Syed
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