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GeneralSpinel twinning in copper crystals

25th Jul 2015 16:54 UTCBarry Miller

I think that I understand what a spinel twin is. I believe that the twin plane goes through the center of an octahedron and is parallel to an octahedron face. Sometimes I see descriptions of copper crystals, such as of the herringbone type, and the description of those specimens say that they include spinel twins. But I have trouble visualizing how these sometimes long crystals are said to be spinel twins. Can someone explain why they are spinel-type twins?

25th Jul 2015 21:32 UTCBarry Miller

Thank you very much Johan.
 
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