Dudleyite

Dudleyite is a mineral, named after Dudleyville, Alabama. It is a vermiculite, hydrous mica, derived from margarite,[1] or phlogopite.

References
  1. Oxford English Dictionary, Vol 3, page 704, col. a. (1933) Oxford University Press

Further reading
  • Proceedings of the American Philosophical Society, Vol. XIII p. 404 (1873)
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