I'm interested in knowing how to figure out the relationship between the
unit cell contents and the crystal habit in these crystals (small
attachment, two roughly orthogonal views).
Space group is P64 (enantiomeric) , and you can clearly see the
six-fold. The question becomes how to determine
Maybe I confused the question by asking about the direction of the screw
axis. I'm referring to the top and base of the actual crystal. If all
the molecules in the unit cell are oriented in the same direction (with
respect to the c cell), I want to know if there is a way to find out
which
Hi
Sorry about this, it's been a hard day and it's the first thing I thought of
when I saw the pics of crystals...
Brits of a certain age may be reminded of Gerry Anderson's UFOs...
On 1 Jun 2015, at 17:20, Paul Paukstelis wrote:
I'm interested in knowing how to figure out the relationship
: Monday, June 01, 2015 12:24 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] crystal habit/morphology and the relationship to unit
cell contents
I would have thought that what the indexing routine defined as [001] vs [00-1]
would be essentially random as one would obtain the equivalent indexing
Yes, but where is the screw axis in that UFO?
JPK
From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Harry
Powell
Sent: Monday, June 01, 2015 12:36 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] crystal habit/morphology and the relationship to unit
cell contents
Hi
] On Behalf Of Paul
Paukstelis
Sent: Monday, June 01, 2015 11:21 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] crystal habit/morphology and the relationship to unit cell
contents
I'm interested in knowing how to figure out the relationship between the unit
cell contents and the crystal habit
[mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Paul
Paukstelis
Sent: Monday, June 01, 2015 11:21 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] crystal habit/morphology and the relationship to unit cell
contents
I'm interested in knowing how to figure out the relationship between the unit
cell contents
@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] crystal habit/morphology and the relationship to unit
cell contents
I would have thought that what the indexing routine defined as [001] vs [00-1] would be essentially
random as one would obtain the equivalent indexing in 622 in both up and
down alignment
] On Behalf Of
Phil Jeffrey
Sent: Monday, June 01, 2015 12:24 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] crystal habit/morphology and the relationship
to unit cell contents
I would have thought that what the indexing routine defined as [001]
vs [00-1] would be essentially random as one would
[mailto:CCP4BB@JISCMAIL.AC.UK] On
Behalf Of Phil Jeffrey
Sent: Monday, June 01, 2015 12:24 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] crystal habit/morphology and the
relationship to unit cell contents
I would have thought that what the indexing routine defined as
[001] vs [00-1
You need:
a) to have an image of your crystal mounted on the goniometer in
orientation, in which the axis of interest (6-fold) is perpendicular to
the beam. You should know the system well enough to relate the coordinate
system of the crystal on this image to the beam-gravity coordinate system.
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