steenstrupine

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English

Etymology

From Steenstrup +‎ -ine.

Noun

steenstrupine (uncountable)

  1. (mineralogy) A rare dark brown mineral, (La,Ca,Na)(Al,Fe,Mn)(Si,P)(O,OH,F)4, found in Greenland, occurring in rhombohedral crystals or massive formations.
    • 1963, Bent Eske Koch, E. I. Hamilton, William E Davies, Meddelelser Om Grønland, page 31:
      It is a remarkable fact that the most fresh steenstrupine in lujavrites and veins is found in rocks carrying albite (and ussingite).
    • 1979, Rapport, numbers 95-103, page 110:
      In most of the Ilímaussaq rocks, Th and U are concentrated in eudialyte, but in the final lujavrites they are largely held by steenstrupine.