Definition of pigeonite in English:

pigeonite

noun

mass noun
  • A calcium-poor pyroxene mineral occurring chiefly in basalt.

    • ‘Pigeonite is the orthorhombic pyroxene equivalent in the volcanic rocks.’
    • ‘Various factors, including magma composition, control whether orthopyroxene or pigeonite occurs as the low-Ca pyroxene, but high temperatures yield orthopyroxene and low-pressure crystallization favours pigeonite.’
    • ‘There appear to be a number of different possible mechanisms for the pigeonite - orthopyroxene transformation.’
    • ‘This contrasts with the first-order character for the HT phase transition in pigeonite containing significantly less calcium.’
    • ‘Orthopyroxene forms in primitive (high-MgO) basalts but as differentiation proceeds, it is replaced by pigeonite once the enstatite component falls below 60 to 70 atomic percent.’

Origin

Early 20th century: named after Pigeon Point, Minnesota, + -ite.

Pronunciation

pigeonite

/ˈpɪdʒ(ə)nʌɪt/