Licenses for IFEFFIT and Feff6
IFEFFIT, FEFFIT, AUTOBK, and FEFF6 are Open Source software. You are free to use, modify, and redistribute the source code and documentation. There is no charge for their use. The limitations are, however, real and significant, and these codes are NOT placed in the public domain because I demand that you cannot do these two things: you cannot claim you wrote the program or documentation, and you cannot prevent other people from using them.
The source code and documentation for IFEFFIT, FEFFIT, and AUTOBK are distributed under the terms of the following license:
Copyright (c) 1997--2002 Matthew Newville, The University of Chicago
Copyright (c) 1992--1996 Matthew Newville, University of Washington
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THIS SOFTWARE.
The source code for FEFF6L, is distributed under the terms of the following license:
Copyright (c)  University of Washington
This software was prepared in part with US Government Funding under DOE contract DE-FG03-97ER45623.
Redistribution and use of this Distribution in source and binary formats, with or without modification is permitted, provided the following conditions are met:
- Redistributions must retain the above notices and the following list of conditions and disclaimer;
- Modified versions carry the marking Based on or developed using Distribution: FEFF6L Copyright (c)  University of Washington
- Recipient acknowledges the right of the University of Washington to prepare uses of this Distribution and its modifications that may be substantially similar or functionally equivalent to Recipient-prepared modifications.
- Recipient and anyone obtaining access to the Distribution through recipient's actions accept all risk associated with possession and use of the Distribution.
THIS SOFTWARE IS PROVIDED AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF WASHINGTON OR CONTRIBUTORS TO THE DISTRIBUTION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR REVENUE; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Citations: Please cite at least one of the following articles if FEFF is used in published work:
- Multiple scattering: J.J. Rehr and R.C. Albers, Phys. Rev. B41, 8139 (1990). J.J. Rehr, S.I. Zabinsky and R.C. Albers, Phys. Rev. Let. 69, 3397 (1992).
- General reference: J.J. Rehr, J. Mustre de Leon, S.I. Zabinsky, and R.C. Albers, J. Am. Chem. Soc. 113, 5135 (1991).
- Technical reference: J. Mustre de Leon, J.J. Rehr, S.I. Zabinsky, and R.C. Albers, Phys. Rev. B44, 4146 (1991).