Definition of piemontite in English:

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piemontite

Pronunciation: /ˈpēmənˌtīt/

noun

A brown or black mineral of the epidote group consisting of a silicate of calcium, aluminum, iron, and manganese.
Example sentences
  • It forms a series with clinozoisite and, together with a group of other minerals including zoisite, the allanites, and piemontite, is a dominant member of the epidote group.
  • He reported that material previously said to be piemontite was actually a manganan epidote.
  • Since the formation of piemontite is dependant of a high concentration of manganese it is commonly found together with other manganese minerals.

Origin

Late 19th century: from Italian Piemonte (see Piedmont) + -ite1.

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