Pyroxene structure
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The layer of pyroxene structure
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Structural model of the mineral pyroxene built from the right tetrahedra and octahedra.
This model was designed to illustrate the structure of one of the rock-forming silicates - pyroxene.
I plasticized such a model during several years of my teaching crystallography for geologists and believe me they do perfectly work. Much better then the simple pictures or even 3D-models on the screen.
The model is strong enough, but be carful, when falling down from the table it can break along the row of tetahedra.
Print several such a layers and ask students to built the whole structure, which can be also the good test on exam. Clynopyroxenes and orthopyroxnes can be assmbled in such a manner.
Another exercise is to built the structures from separate tetrahedra and octahedra (which models you can easily find). In this case, I recommend to use magnets, it will sufficiently save the time of model construction.
Other information, video and discussions at https://t.me/SciCryst