August 2014 - Ifeffit - millenia.cars.aps.anl.gov

Re: [Ifeffit] space group P 4/mmc ?
by Bruce Ravel 08 Aug '14

08 Aug '14

On 08/08/2014 03:33 PM, Marinkovic, Nebojsa wrote: > Bruce, > I found the PtO strucutre (WJ Moore, JACS 63 (1941) 1392) reported as P > 4/m m c , but Atoms says "invalid space group". Any clues? > Thanks, > Ned > Hi Ned, I am CCing my answer to the Ifeffit Mailing List since I think this question of general interest. The author is using archaic notation, which is a common problem with crystallography references from the early decades of the 20th century. "P 4/m m c" does not exist in the modern International Tables of Crystallography. See http://en.wikipedia.org/wiki/List_of_space_groups Happily the author also gives the Schoenflies notation. "D^9_4h" is "P 42/m m c" in modern notation. The majority of the symbols Artemis recognizes are given in the Artemis Users' Guide: http://bruceravel.github.io/demeter/artug/atoms/space.html although perhaps not in the most useful manner. The wikipedia page is also useful for resolving a Schoenflies symbol to the corresponding Hermann-Maguin symbol. You can also simply use the Schoenflies symbol in Artemis. The string "D^9_4h" should be recognized by Atoms as the same as "P 42/m m c". B -- Bruce Ravel ------------------------------------ bravel(a)bnl.gov National Institute of Standards and Technology Synchrotron Science Group at NSLS --- Beamlines U7A, X24A, X23A2 Building 535A Upton NY, 11973 Homepage: http://bruceravel.github.io/home/ Software: https://github.com/bruceravel Demeter: http://bruceravel.github.io/demeter/

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Undo in Athena
by Peng Liu 01 Aug '14

01 Aug '14

Hello everyone, I have one more question about undo in Athena, e.g. I accidentally deleted one of the good spectra, how I can get it back. In word, I can go to Edit and click undo, but I haven't found it in Athena. Thanks for your time, Peng -- Ph.D. Candidate Earth and Environmental Sciences, CEIT Bldg. Rm. 2026 University of Waterloo Ph: 519-888-4567 ext. 37232 200 University Avenue West Waterloo, Ontario N2L 3G1 Fax:519-746-3882 p26liu(a)uwaterloo.ca

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larch warning about epics plugin
by Johan Nilsson 01 Aug '14

01 Aug '14

Hello, Today I reinstalled larch after upgrading my computer to Ubuntu 14.04. I downloaded the latest source and installed all the recommended dependencies except PyEpics and then continued with the install. Everything went smoothly and larch appears to be working as it should. However when I start the program I get warning messages about the epics plugin $ larch Larch 0.9.23 (8-Apr-2014) M. Newville, T. Trainor using python 2.7.6, numpy 1.8.1, wx-enabled, wx version 2.8.12.1 Warning: /usr/share/larch/plugins/epics/xrfcontrol.py is not a valid plugin error: ImportError('cannot import name ROI',) Warning: /usr/share/larch/plugins/epics/xrf_detectors.py is not a valid plugin error: ImportError('cannot import name ROI',) Warning: /usr/share/larch/plugins/epics/xspress3.py is not a valid plugin error: ImportError('cannot import name ROI',) I have no plans to use this plugin but I tried to install PyEpics to see if anything would change but it did not. Is this a bug or is there some configuration I can change to get rid of the warnings? --Johan

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