chem cryst
X-ray Crystallography
University of Oxford
chem cryst news
July 2010 >>
CRYSTALS Version 14.11
is available as a beta-test.
Many small changes in Regularise Replace thanks to a CRYSTALS workshop in Toulouse organised by Carine Duhayon and Laure Vendier. Cif generator now properly includes esds on refined hydrogen bonds, has incrreased figure-fields for cell parameters, and appends constraint and restraint information as _iucr_ data items at end of cif. Improved scaling of difference Pattersons - see forthcoming paper by Flack, Sadki, Thompson etc. Absolute configuration routine (based on PLATON with Ton's permission) extended to provide more diagnostics and additional data to be re-input as absolute-structure strengthening restraints (see paper by Howard etc above). Error tracking for "USE" files has been improved.
Collaboration with Ernesto Mesto (Dipartimento Geomineralogico - Università degli Studi di Bari) uncovered over-sights in the original 1979 code, which lost contributions when a twin component fell onto a centring absence. Difference maps with twinned data now seem to reveal hydrogen atoms very reliably.
Many small changes in Regularise Replace thanks to a CRYSTALS workshop in Toulouse organised by Carine Duhayon and Laure Vendier. Cif generator now properly includes esds on refined hydrogen bonds, has incrreased figure-fields for cell parameters, and appends constraint and restraint information as _iucr_ data items at end of cif. Improved scaling of difference Pattersons - see forthcoming paper by Flack, Sadki, Thompson etc. Absolute configuration routine (based on PLATON with Ton's permission) extended to provide more diagnostics and additional data to be re-input as absolute-structure strengthening restraints (see paper by Howard etc above). Error tracking for "USE" files has been improved.
Collaboration with Ernesto Mesto (Dipartimento Geomineralogico - Università degli Studi di Bari) uncovered over-sights in the original 1979 code, which lost contributions when a twin component fell onto a centring absence. Difference maps with twinned data now seem to reveal hydrogen atoms very reliably.
Bob Carruthers worked with John Rollett and Keith Prout to produce the core data management and crystallographic subroutines upon which CRYSTALS is built. It was his vision and meticulous attention to detail which provided a kernel which still works well after 40 years of change in computing technology.
David Watkin's "Introduction to Crystallography for Part II and DPhil research workers"
Here are the handouts from David's lectures. They can only be downloaded by machines inside the Oxford Chemistry network
Advanced course
Richard Cooper's "Introduction to the CSD Tools"
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