Crystal structure of <a href="https://en.wikipedia.org/wiki/Manganese(II,III)_oxide" class="extiw" title="en:Manganese(II,III) oxide">en:Manganese(II,III) oxide</a>
<a href="//commons.wikimedia.org/wiki/User:Orci" title="User:Orci">Orci</a>
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<span class="int-own-work" lang="en">Own work</span>, data source: <a rel="nofollow" class="external text" href="http://rruff.geo.arizona.edu/AMS/result.php?mineral=Hausmannite">American Mineralogist Structure database: Hausmannite</a>