Laboratory of Crystallography

Structure analysis of aperiodic and periodic crystals

This is a home page of the research group of Dr. Vaclav Petricek in the Institute of Physics.

The laboratory is specialized in structure analysis of aperiodic and periodic crystals and in precise diffraction experiment. Our main project is development of the computing system JANA as a universal crystallographic tool for structures up to six dimensions based in any kind of diffraction data. Jana is currently widely spread program with more than 1000 registered users. Another fields covered in our labratory are charge flipping, magnetic structures, electron density studies by method of maximum entropy, phase transitions, twinning, polytypism, preparation of oriented specimens etc.

Milestones

2008 We expect installation of the Gemini A diffractometer

2007 Vaclav Petricek awarded by Praemium Academiae

2004 First version of program Superflip written by Lukas Palatinus

2004 CCD detector Sapphire2 installed in the diffractometer Xcalibur

2001 Jana2000 > Jana98 + powder data

2000 Diffractometer Xcalibur with point detector

1998 Jana98 > Jana94 + GUI

1997 Lukas Palatinus, new PhD student

1994 Jana94, computing system for modulated structures based on command line

1990 Era of personal computers begins ...

1989 Michal Dusek, new PhD student

1984 Jana, refinement program for modulated structures written by Vaclav Petricek in Buffalo

1981 Siemens 7536, the second (and last) hall computer

1972 Vaclav Petricek, new PhD student

1971 Tesla 200, the first hall computer

1967 Diffractometer Hilger & Watts

1963 Zuse Z-22/R alias Zuzana, the first universal computer

1954 SuperEliska, Fourier maps calculator

1953 Eliska, structure factors calculator

Equipment

Four circle X-ray diffractometer Xcalibur2 with CCD detector Sapphire2 and Mo radiation from Oxford Diffraction

Cooler: Cryojet HT allows for temperatures between 100 and 500 K

Heater: KUMA HotJet allows for temperatures up to 680 K

Back- and front reflection Laue camera

Buerger precession camera

Weissenberg goniometers

Staff

Václav Petříček	Head of the group. Expert to crystallographic computing and structure analysis of complicated structures. Author of the crystallographic system JANA.
Michal Dušek	Structure analysis, diffraction experiment. Co-author of the crystallographic software JANA. In charge of the diffractometer lab.
Lukáš Palatinus	Structure analysis, maximal entropy method for modulated structures, electron densities, charge flipping. See also superflip.
Jiří Hybler	Structural studies of polytypes, chain and layer structures, OD structures in general, twins. Preparation of oriented specimens for various physical studies. In charge of film methods. Personal page: here.
Jan Dohnálek	Expert in protein crystallography. Part time.
Tomáš Kovaľ	PhD student. Protein crystallography.
Karla Fejfarová	PhD student. Crystallography of small molecules. In charge of service crystallography.
Olfa Labidi	Postdoc position.
Ludvík Hummel	Technician.
Jaroslava Bergerová	Technician.
Ctirad Novák	Emeritus scientist

News

Seminary timetables (in Czech)
Printing of posters (in Czech)
Using SpamAssassin with Pegasus mail (in Czech)

Links

JANA home page
ECA Special Interest Group on Aperiodic Structures
Czech and Slovak Crystallographic Association
Czechoslovak Association for Crystal Growth (CSACG)

Crystallography Online

Miscellaneous:
Greninger chart for interpretation of back reflection Laue photographs
Publications

Department of Structure Analysis

This page is maintained by Michal Dusek (Michal.Dusek@fzu.cz)