Biologic Precipitation of Fluorite

Journal/Book: Reprinted from SCIENCE 27 December 1968 volume 162 pages 1496-1498. 1968;

Abstract: H. A. LOWENSTAM California Institute of Technology Pasadena 91109 DUNCAN McCONNELL Ohio State University Columbus Abstract. X-ray diffraction patterns show that the statoliths of marine mysid crustaceans are composed of fluorite and that this mineral is also a principal phase of the gizzard plates of some tectibranch gastropods. A phosphatic phase is also indicated by chemical analyses in the gizzard plates but its crystallochemical characterization has not been feasible by x-ray diffraction. The occurrence of fluorite in mysid statoliths confirms the earlier interpretations based an insufficient documentation. Fixation of fluorine in hard tissues of marine invertebrates is extensive in the shelf seawaters and minor in the bathyal zone of the oceans. ___MH

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