Lazy: a program for calculation of crystal powder patterns

Dane Spearing dane at
Wed Jan 13 18:00:32 EST 1993

The following is a excerpt from a posting to comp.sys.mac.digest
that I thought might be of interest to people who read this
group. The demo program is available via anonymous ftp from

>Lazy calculates crystallographic powder diffraction patterns
>for X-ray, synchrotron and neutron radiations.  It can be
>used either as a teaching or research tool to investigate the
>effect of structural changes. This demo version is not time
>limited, and is fully functional except that it calculates
>only for large d-spacings.  The full version is marketed by
>the University of Geneva.
>Lazy is derived from the main-frame programme 'Lazy-Pulverix',
>but the Mac interface makes it very easy to set up the data
>and plot the results.  Simply point to the crystal symmetry,
>and select from the list that unfolds.  Then point to one of
>the proposed space groups, point to the radiation, the diffr-
>action technique etc.  The only thing you need to type is the
>atom co-ordinates.  You can even avoid that if you construct
>a library of your favourite structures.  Then you simply
>select one from the data window to call up the co-ordinates,
>which you can edit to create a new structure. The plot output,
>with all of the reflexions labelled, can be resized, cut and
>pasted between applications, saved as a PICT file, and printed
>to high resolution laser or color printers.
>Lazy will work on any Macintosh computer with an FPU running
>system 6 or 7 with at least 2Megs of memory and a hard disk.
>[Archived as /info-mac/demo/lazy.hqx; 774K]

     DANE SPEARING       | Dept of Geology     | (415) 723-4092
dane at | Stanford University |--------------------->
  AOL: DaneRS at    | Stanford, CA  94305 | (415) 725-2199  FAX

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