Mineralpedia Details for Threadgoldite
Threadgoldite
Named after Ian Malcomb Threadgold, a mineralogist who worked at the University of Sydney in Sydney, Australia. This rare mineral occurs in just a few localities as a secondary mineral in uranium-rich zones of complex, zoned granite pegamitites. Threadgoldite is quite radioactive and will fluoresce green under long-wave ultraviolet light and a pale green under short-wave ultraviolet light.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/threadgoldite.pdf
- Formula
- Al(UO2)2(PO4)2(OH)ยท8H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Micaceous, Tabular
- Cleavage
- Perfect, None, None
- Color
- greenish yellow
- Streak
- yellow white
- Class
- Monoclinic - Prismatic
- Hardness
- 2-3
- WebMineral
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- Mindat
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Threadgoldite from Kobokobo Pegmatite, Sud-Kivu, Democratic Republic of Congo
Bright yellow, platy micro crystals.
Click thumbnail images for larger view.
