General Information 0100


Balsac Program Features

The program system Balsac (Build and Analyze Lattices, Surfaces, And Clusters, (C) Copyright K. Hermann 1991-2021) allows the construction, visualization, and interactive analysis of general crystal lattices including single crystal surfaces (Lattice sessions) and of finite clusters and molecules (Cluster sessions). Structural graphics information can be saved on binary bitmap as well as gray scale and color PostScript files to obtain publication quality graphics output. Further, numerical structure output may be stored on ASCII-type data files using a variety of different formats.

Balsac versions exist for Unix/Linux based workstations and mainframes using X.11 Windows for graphics output and for MS Windows based personal computers using MS Windows color graphics. The Linux version of Balsac can also be compiled and run on Macintosh PC’s with OS X or later.

The Balsac program system is copyright protected and may be obtained from

Max-Planck-Innovation GmbH
Amalienstr. 33, 80799 München (Germany)
Tel.: [+49] 89 2909190
Fax.: [+49] 89 29091999

The latest version of the Balsac manual (Version 4 at present) is also accessible electronically on the Web at


Example pictures of Balsac applications can be found in the Balsac picture gallery on the Web at


A batch application of Balsac, called "SURFACE EXPLORER", can be found on the Web at



To comply with copyright laws and as a matter of fairness/politeness to the author any publication which includes Balsac output in printed form should also include a reference similar to

“[Ref]    Balsac visualization and analysis software, Version 4, by K. Hermann (FHI), Berlin, 2021;
see also”.

in the text or reference section. Further, oral or poster presentations using Balsac graphics output must include the "Balsac plot" logo at the bottom right of the plot unless the logo disturbs the visual impression.

For technical questions on Balsac please contact the author

Prof. Dr. Klaus Hermann
Faradayweg 4-6
D-14195 Berlin (Germany)

Tel.: [+49] 30 8413 4812   Fax: [+49] 30 8413 5914

e-mail:  hermann@FHI-Berlin.MPG.DE


Note that in this manual clicking on the left and right mouse buttons will be called L-clicking and R-clicking, respectively. D-clicking means double-L-clicking (L-clicking twice in quick succession).

In this manual we will use the notation "select menu A | B" to denote the selection of menu B which is a submenu of menu A.

Note that the help window may hide previously opened windows. These hidden windows can be reactivated by L-clicking the appropriate icon of the task bar at the bottom of the screen.

Note that context sensitive help is available for all visualizer options by pointing at the option (menu entry or input field) and pressing the F1 key while keeping the left mouse button down.