turgite

noun

1. (countable, uncountable)A ferric hydrate, 2Fe₂O₃H₂O, closely related to hematite and limonite.

   “The Bakal' deposit is a relatively rare type of iron deposit; the ores are siderites, grading in the oxidized zone into brown ironstones and turgites.”

   “The fibrous mineral turgite is variable in composition, and considerable evidence is given that it probably represents solid solutions of goethite with hematite with enclosed and capillary water.”