steenstrupine

noun

steen·​strup·​ine

ˈstēnstrəˌpēn,

-nˌstru̇pə̇n

plural -s

: a mineral (La,Ca,Na)(Al,Fe,Mn)(Si,P)(O,OH,F)₄(?) consisting of a complex silicate, phosphate, and fluoride of the rare-earth metals, calcium, sodium, aluminum, iron, and manganese, and occurring in dark brown rhombohedral crystals

Word History

Etymology

Danish steenstrupine, from K. J. V. Steenstrup †1913 Danish geologist + Danish -ine

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