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Citiric acid Polarized light |
Microscopy, photomicrograph, Microfoto |
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Crystallisation of Citric acid Polarized light |
Microscopy, photomicrograph, Microfoto |
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Tartaric acid Polarized light |
Microscopy, photomicrograph, Microfoto |
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Hauyn Vulcanaic mineral from the Eifel |
Microscopy, photomicrograph, Microfoto |