Jana2020 is the successor to the well-known Jana2006, designed for solving regular, modulated, and magnetic structures from X-ray, neutron, and electron diffraction data. Over its 13 years of development, Jana2006 has established itself as the leading software for structure analysis of aperiodic samples, becoming the tool of choice for complex twins and increasingly popular for magnetic structures.
The major advancements in Jana2020 include a transition from the outdated graphics of Jana2006 to a modern interface based on the OpenGL library. Additionally, we have created a new plotting program that visualizes standard, modulated, and magnetic structures. This program integrates the essential components of the Jana tools, allowing users to access them traditionally through user forms or directly from the structure plot.
Development of the program is ongoing, with new versions released every few months and minor updates made weekly. The capabilities of the latest version significantly surpass those of Jana2006, which we stopped updating around 2020. Currently, the program has over 6,000 registered users. Recent innovations in Jana2020 include a new tool for the analysis of representations for commensurate and (3+1)d incommensurate magnetic structures, which brings our program closer to the capabilities of the ISODISTORT tool [3]; random procedures for q-vector determination in powder structures based on the Le Bail profile method, which can also be used directly from the Jana representation analysis for systematic searches of section points in the Brillouin zone; data import for time-of-flight data from Rutherford ISIS SXD in England and Oak Ridge National Laboratory in the United States; and refinement of novel parameters significantly improving the quality of the refinement from 3D electron diffraction data.
Jana2020 can read electron diffraction data processed by the PETS program and directly communicates with Dyngo, which calculates derivatives of electron diffraction experimental parameters and corrects derivatives of structure factors for dynamical effects. This process yields structure models from electron diffraction data with an accuracy approaching that of X-ray-based structure analysis.
Publications using Jana2020 should cite the following work:
V. Petříček, L. Palatinus, J. Plášil & M. Dušek
JANA2020 – a new version of the crystallographic computing system JANA
Z. Kristallogr. 238(7–8) (2023) 271 – 282
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Other publications related to methods implemented in Jana2020:
Previous program version
V. Petříček, M. Dušek, L. Palatinus
Crystallographic Computing System JANA2006: General Features
Z. Kristallogr. 229(5) (2014) 345 - 352.
Magnetic structures
M.S. Henriques, V. Petříček, S. Goswami & M. Dušek
Analysis of magnetic structures in JANA2020
Acta Crystallogr. B 80 (2024) 409 - 423.
J.M. Perez-Mato, J.L. Ribeiro, V. Petříček, M.I. Aroyo
Magnetic superspace groups and symmetry constraints in incommensurate magnetic phases
J. Phys.-Condens. Mat. 24 (2012) 163201(1) - 163201(20).
V. Petříček, J. Fuksa, M. Dušek
Magnetic space and superspace groups, representation analysis: competing or friendly concepts?
Acta Crystallogr. A 66 (2010) 649 - 655.
Twins
V. Petříček, M. Dušek, J. Plášil
Crystallographic computing system Jana2006: solution and refinement of twinned structures
Z. Kristallogr. 231(10) (2016) 583 - 599.
Modulated structures
V. Petříček, V. Eigner, M. Dušek, A. Čejchan
Discontinuous modulation functions and their application for analysis of modulated structures with the computing system JANA2006
Z. Kristallogr. 231 (2016) 301 - 312.
A. Leineweber, V. Petříček
Microstrain-like diffraction-line broadening as exhibited by incommensurate phases in powder diffraction patterns
J. Appl. Crystallogr. 40 (2007) 1027 - 1034.
Electron diffraction
L. Palatinus, V. Petříček, C.A. Correa
Structure refinement using precession electron diffraction tomography and dynamical diffraction: theory and implementation
Acta Crystallogr. A 71 (2015) 235 - 244.
L. Palatinus, C. A. Correa, G. Steciuk, D. Jacob, P. Roussel, P. Boullay, M. Klementová, M. Gemmi, J. Kopeček, M. C. Domeneghetti, F. Cámara, V. Petříček
Structure refinement using precession electron diffraction tomography and dynamical diffraction: tests on experimental data
Acta Crystallogr. B 71 (2015) 740 - 751.
Other topics
K. Friese, A. Grzechnik, J.M. Posse, V. Petříček
Refinement of high pressure single-crystal diffraction data using Jana2006
High Pressure Res. 33 (2013) 196 - 201.