Dana Crystal Models - tetragonal

This is a reproduction of "The Dana Set of Wooden Crystal Models" originally produced by Dr. Krantz Rheinisches Mineralien-Kontor (Bonn).

triclinic: https://www.thingiverse.com/thing:5229222
monoclinic: https://www.thingiverse.com/thing:5225493
orthorhombic: https://www.thingiverse.com/thing:5215966
hexagonal/trigonal: https://www.thingiverse.com/thing:5256241
tetragonal: https://www.thingiverse.com/thing:5246339
cubic: https://www.thingiverse.com/thing:5271218

I recreated the models based on reference images in "Dana's Textbook of Mineralogy" (https://archive.org/details/DanasTextbookOfMineralogy), with forms taken from the catalogue available here (provided by the company): https://mineralogy.eu/models/Krantz/Krantz_31_3.pdf

Whenever a model corresponds to a crystal structure, the known unit cell constants were used. In all other cases I approximated to match the pictures in Dana's book. Please note that I do not have an original set to compare, so there might be small