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I'm looking for a database of very basic crystal models for all the various types - triclinic, monoclinic, orthorhombic, tetragonal, rhombohedral, hexagonal, and cubic.

A basic example would be a CAD file for a cube, to represent the cubic structure. I don't want like a packing model which shows the individual atoms because I'm trying to represent macroscopic crystals.

Any ideas where I could find what I'm looking for? Not a 3D graphic designer.

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    $\begingroup$ Crystallographic database. CAD file formats are not used in crystallography (maybe unless you are an architect building another Atomium), look for CIF instead. $\endgroup$ – andselisk Jul 29 '20 at 6:27
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    $\begingroup$ There are exactly seven of them, all of which you already listed in your question. Why a database? And what do you want to do with them, with what software? $\endgroup$ – Karl Jul 29 '20 at 6:49
  • $\begingroup$ sounds like you need a database of polyhedra, not chemicals $\endgroup$ – gilleain Jul 29 '20 at 8:19
  • $\begingroup$ for example, something like : georgehart.com/virtual-polyhedra/vp.html $\endgroup$ – gilleain Jul 29 '20 at 8:38
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Joining @Karl's comment on «what do you want to do with them?» the work to present point groups is work already solved. For off-line teaching, the freely accessible collection of the 32 point groups by Casas and Estop by (UB Barcelona) may suit your needs:

enter image description here

The model data are provided as interactive 3D .pdf files which a reader like Adobe Acrobat 9.0 may let you toggle on/off the axes / planes, etc.

Beside some background provided here, the authors outline the workflow and tools used (SolidWorks, Adobe Illustrator CS3, and Adobe Acrobat 9 Pro) in an accompanying publication (doi 10.1016/j.cageo.2013.09.004, paywall). Later, the concept was extended to cover the space groups as to complement the International Tables of Crystallography, too (title page, paywall).

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