Summary
One piece of psilomelane (Manganese Oxides), used in a radio detector. Properties discovered by Karl Ferdinand Braun after 1874. First marketed as a detector by Telefunken in 1901. Possibly artificial in origin.
Physical Description
Small piece of brownish material with lighter coloured inclusions. Accompanied by label from missing display board.
More Information
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Collecting Areas
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Acquisition Information
Purchase & Subsequent Transfer from Science Museum of Victoria (SMV), 11 Jun 1973
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Date Used
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Inscriptions
Label: PSILOMELANE/(MAINLY MANGANESE OXIDES)
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
22 mm (Length), 15 mm (Width), 6 mm (Depth)
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References
Galena - [Link 1]
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Keywords
Manganese Minerals, Psilomelane, Radios, Radio Detector Crystals