[phenixbb] When to freeze crystal?

Nathaniel Echols nechols at lbl.gov
Wed Oct 13 08:44:42 PDT 2010

On Wed, Oct 13, 2010 at 4:16 PM, J J <phenix.upitt at gmail.com> wrote:
> Hi everyone,
> Sorry to ask a question that is not really related to phenix. I hope someone
> here will be able to help me out.
> I have a few crystals at hand right now, but I will not be able to look at
> them for at least another month or so due to beamline schedule. Do you think
> I should freeze them now or wait till I have my beamtime, or it is crystal
> dependent? Thanks in advance.

(Bert meant to send this to the list, but since he's using the wrong
email address, it went to the list admin instead:)

From: "Van Den Berg, Bert" <Lambertus.VandenBerg at umassmed.edu>
To: "PHENIX user mailing list" <phenixbb at phenix-online.org>
Date: Wed, 13 Oct 2010 11:27:32 -0400
Subject: Re: [phenixbb] When to freeze crystal?
It is crystal dependent, but if they are big enough I would freeze
them now. I  have seen many crystal forms deteriorate over time and
wouldn’t take the risk of that happening. It can happen though that
old crystals get better (presumably due to slow dehydration of the
drop), but I think these cases are fairly rare.


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