CCL:G: generating and processing electron density files for CP2K, GPAW, SIESTA, etc.



Dear colleagues,

I would like to solicit your help in checking the workability of the latest Chargemol version (ddec.sourceforge.net) for performing DDEC6 atomic population analysis. My research group routinely uses the VASP 5 and Gaussian 09 codes, so we know it is reading and processing the VASP 5 (AECCAR0, AECCAR2, CHG, & POTCAR) and Gaussian 09 (.wfx) files correctly.

Where I need help is in checking to make sure the code is successfully processing files for other software codes such as CP2K, GPAW, SIESTA, etc. If you are able to run those data successfully with Chargemol code, it would be extremely helpful to fellow users if you could send me a summary of how you prepared and processed those data. Then I will add brief instructions to the users manual for the benefit of other users.

In particular, I am unsure which of those codes are generating cube files in units of angstroms and which are generating them in atomic units (bohrs). Recently, I added option to the Chargemol code that allows to specify in job_control.txt which type of units to use in reading the cube file. But, since I do not presently use those quantum chemistry codes, I have to rely on users to provide information about the format of those cube files.

Whatever clarity you can provide about how to generate and process those data files would be appreciated.

Sincerest thanks,

Tom Manz