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[EMAIL PROTECTED] wrote on 06/15/2006 12:30:53 PM: (snip) > > Of course what we would (all) profit from is a kappa goniostat... > > I hope this helps - good luck! and best wishes > > Pietro > Hampton sells the poor man's kappa: http://www.hamptonresearch.com/products/ProductDetails.aspx?cid=25&sid=151&pid=413 You use your regular goniometer rotation as the omega axis; the adjustable orientation on this arc is your kappa; and spinning the crystal pin on the magnetic base is your phi. It's obviously not as accurate as a computer-controlled system, you need to recenter the crystal constantly as you're adjusting orientations, and you'll tie yourself in knots trying to find the right orientation, BUT you will get it eventually. I've collected datasets on two different projects with orientation problems and long c axes using this trick. And the gadget's only $135! Charles Supper sells the poor man's chi goniostat, as well: http://www.charles-supper.com/Extended_Arc_Goniometer_Head_Detachable_Assembly.htm This one is a lot more work to use and you have more hardware that can crash into your collimator, coldstream, beamstop, detector... - Matt -- Matthew Franklin phone:(917)606-4116 Senior Scientist, ImClone Systems fax:(212)645-2054 180 Varick Street, 6th floor New York, NY 10014 Confidentiality Note: This e-mail, and any attachment to it, contains privileged and confidential information intended only for the use of the individual(s) or entity named on the e-mail. If the reader of this e-mail is not the intended recipient, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that reading it is strictly prohibited. If you have received this e-mail in error, please immediately return it to the sender and delete it from your system. Thank you.
