The Collaborative International Dictionary of English v.0.48:
Strontianite \Stron"ti*an*ite\, n. (Min.) Strontium carbonate, a mineral of a white, greenish, or yellowish color, usually occurring in fibrous massive forms, but sometimes in prismatic crystals. [1913 Webster]WordNet (r) 3.0 (2006):
strontianite n 1: a mineral consisting of strontium carbonate