Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Dominika Borek
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. b

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Tim Gruene
"top" face > >>>always the [001] direction or is it the [00-1] direction for > >>>other crystals? Assuming that you are growing these crystals > >>>by hanging drop, my guess is that the "base" is in contact > >>>with the coverslip d

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Paul Paukstelis
.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] would be essentially random as

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Edward A. Berry
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 in 622 in both "up" a

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Roberts, Sue A - (suer)
ffrey 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 obtain the equivalen

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Phil Jeffrey
Scott -Original Message- From: CCP4 bulletin board [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

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Scott Lovell
From: CCP4 bulletin board [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 be

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Keller, Jacob
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

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Paul Paukstelis
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 direc

Re: [ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Harry Powell
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

[ccp4bb] crystal habit/morphology and the relationship to unit cell contents

2015-06-01 Thread Paul Paukstelis
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