Definition of achmatite in English:

achmatite

noun

Mineralogy historical
rare
  • Epidote.

Origin

Mid 19th century; earliest use found in Charles Shepard (1804–1886). From German Achmatit from achmat- (in a German transliteration of Russian Axmatovskaja kop' lit. ‘Achmatov mine’, the name of a mine in the Kusinskiy district in the Ural Mountains, Russia, named after its founder P. E. Axmatov) + -it.

Pronunciation:

achmatite

/ˈakmətʌit/