## What is OpenCalphad

OpenCalphad is an informal international collaboration
of scientists and researchers interested in the development
of free high quality software and databases for
thermodynamic calculations for all kinds of
applications.

The intention is to allow interested
scientists to develop thermodynamic models and assess model
parameters for thermodynamic databases to describe
experimental data as well as theoretical results from DFT
calculations to calculate phase equilibria and phase
diagrams. The software can also be used to provide
scientists interested in materials simulations a ď¬‚exible and
reliable software using consistent thermodynamic databases.
Contributions of ideas, software and databases are
welcome.

A particular interest is to support the
current work on a new set of databases with models that will
give a continuous description of the thermodynamic
properties of the pure elements from 0 K up to very high
temperatures and pressures, avoiding awkward breakpoints at
real or fictitious transformation temperatures.
Some examples of calculations
can be found here .

There is a gitter community room
for questions and discussions.

The OC project was initiated by Suzana G. Fries as part of
the Sapiens project at ICAMS (Interdisciplinary Centre for
Advanced Materials Simulations) in Ruhr University, Bochum,
Germany.

### Software releases

The first version of the software for modeling and
equilibrium calculations was developed by Bo Sundman, Ursula
Kattner and Mauro Palumbo and released in March 2013. The
source code for the currently stable version is available at
the Downloads page. OC is
written in the new Fortran standard and should work on most
platforms with a Fortran compiler.

A regularly updated
development version can be downloaded from
the github site for OC.

A third party Graphcal User Interface (GUI) of OpenCalphad (named OpenCalphad CAE) for Windows can be downloaded from link A or link B (extraction code r246 for link B).

*The website is under construction and we
apologize for any problems*