SAPI Direct Methods for Small Structures and Superstructures
- Fan, Hai-fu & colleagues
- Contact: fan@aphy.iphy.ac.cn
- WEB SITE
- Windows95, 98, NT and 2000
- The name SAPI is an abbreviation of "Structure Analysis
Programs with Intelligent control". It may also be read inversely as
"Institute of Physics, Academia Sinica".
- SAPI is written in Fortran for crystallographic computation and
C++ for graphic operation.
- SAPI is based on Multan and differs from it mainly by the ability of
resolving phase ambiguities due to pseudo symmetry.
- Features:
- The program can automatically handle diffraction data from structures having
pseudo-translational symmetry and lead directly to the correct solution in
favorable cases. This is particularly useful for solving superstructures without
relying on an assumed structure model.
- The program can recognize pseudo-centrosymmetric solutions when dealing with
non-centrosymmetric structures. In addition, the program can break the
enantiomorphous ambiguity given the "atomic positions" of both enantiomorphs.
- The program possesses the ability of intelligent control on the path of phase
development according to the feature and complexity of the structure.
- The program enables combination of Patterson and direct methods. Besides,
subroutines are provided for automatic Patterson analysis of heavy-atom
containing structures.
- Sophisticated graphic interface is provided for data preparation, program
control and for displaying and manipulating output results.
- Detailed description at
http://cryst.iphy.ac.cn/Project/cata_program/program.html#SAPI
- [
CCP14 UK Web Mirror] |
[
Canadian CCP14 Mirror] |
[
US CCP14 Mirror]
- Download at
http://cryst.iphy.ac.cn/Download/download.html
- [
CCP14 UK Web Mirror] |
[
Canadian CCP14 Mirror] |
[
US CCP14 Mirror]
|