Definition of iddingsite in English:

iddingsite

noun

  • A brownish mineral deposit consisting of a mixture of silicates, formed by alteration of olivine.

    • ‘Iddingsite is a mixture of orthopyroxene, maghemite, hematite, cristobalite, and amorphous silica that is formed from olivine.’
    • ‘The Lafayette meteorite contains abundant iddingsite, a fine-grained intergrowth of smectite clay, ferrihydrite, and ionic salt minerals.’

Origin

Late 19th century: from the name of Joseph P. Iddings (1857–1920), American geologist, + -ite.

Pronunciation

iddingsite

/ˈidiNGˌzīt/