The runatom.x program generates pseudopotentials (*.uspp files)
in a binary format using "unformatted" fortran write statements.
Unfortunately, different computers may expect unformatted datafiles
to be in different internal formats.  This may cause problems when
trying to move *.uspp files between different computer systems.

The most standard format is the IEEE one; it is used by default on
most Unix and Linux systems.  However, on some systems (such as
DEC/COMPAQ compilers for Alphas) a different default may be in
place.  In such cases, it is recommended to choose compiler options
that will force reading and writing in IEEE format.  See the
Source/Makefile header for hints on how to do this.

However, if this proves problematic for one reason or another, then
the 'reform' program in the Utils/ directory can be used to convert
the pseudopotential datafiles from unformatted to formatted form
and vice versa.  See Utils/README.

(Note: if using ftp to transfer *.uspp files between computers, be
sure to set the 'binary' option.)

Finally, the Utils directory also contains a program read_uspp.f.
This is a dummy program that does nothing but read in a binary
pseudopotential file of version 732 or later.  It could form the
basis for other conversion programs, or simply serve as a concise
summary of the pseudopotential file format.

					David Vanderbilt
					July 2002

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Prof. David Vanderbilt               Phone: (732) 445-2514
Department of Physics and Astronomy  Fax:   (732) 445-4400
Rutgers University                   Email:  dhv@physics.rutgers.edu
136 Frelinghuysen Road               http://www.physics.rutgers.edu/~dhv
Piscataway, NJ 08854-8019   USA
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