Geoscience Communication
Geoscience Communication
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Articles | Volume 6, issue 4
Articles | Volume 6, issue 4
https://doi.org/10.5194/gc-6-125-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/gc-6-125-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 6, issue 4
GC Insights
 | 
05 Oct 2023
GC Insights |  | 05 Oct 2023

GC Insights: The crystal structures behind mineral properties – a case study of using TotBlocks in an undergraduate optical mineralogy lab

Derek D. V. Leung and Paige E. dePolo

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Latest update: 23 Apr 2025
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Short summary
We used 3D-printed building blocks (TotBlocks) in an undergraduate optical mineralogy lab session to illustrate the links between crystal structures and the properties of minerals. Students built mica, pyroxene, and amphibole structures. We observed an improved understanding of cleavage (how minerals break) and pleochroism (how light interacts with minerals), but understanding did not improve with more abstract concepts. TotBlocks hold potential as a teaching tool in mineralogy classrooms.
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