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Dissolution of crystals

beckerj at merck.com beckerj at merck.com
Wed Sep 22 13:53:56 EST 1993

Kathleen=Aertgeerts writes:
> Hi,
> I have grown very nice crystals in PEG but as soon as I mount them 
> in a capillary the crystal gets surrounded by liquid.  Although the
> crystals shape stays intact in the capillary, the diffraction is nihil
> after an hour.
> Does this looks familiar to anyone?  How can I improve the stability of the 
> crystals?
> Kathleen Aertgeerts
This phenomenon is frequently caused by liquid within the capillary distiling
onto the crystal.  It occurs frequently with PEG crystals.  You can deal with
it by using siliconized capillaries and by making the mount drier than you 
would with salt solutions.
					Joe Becker

Joseph W. Becker			|  beckerj at merck.com 
Merck Research Laboratories		|
PO Box 2000 (R50-105) 			|  TEL: (908) 594-3418
Rahway, NJ 07065-0900			|  FAX: (908) 594-5042

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