Narrowly Distributed Crystal Orientation in Biomineral Vaterite

  title={Narrowly Distributed Crystal Orientation in Biomineral Vaterite},
  author={Boaz Pokroy and Lee Kabalah Amitai and Iryna Polishchuk and Ross T. DeVol and Adam Blonsky and Changbo Sun and Matthew A. Marcus and Andreas Scholl and Pupa U.P.A. Gilbert},
  journal={Chemistry of Materials},
Biominerals formed by animals provide skeletal support and many other functions. They were previously shown to grow by aggregation of amorphous nanoparticles but never to grow ion-by-ion from solution, which is a common growth mechanism for abiotic crystals. We analyze vaterite (CaCO3) multicrystalline spicules from the solitary tunicate Herdmania momus, with polarization-dependent imaging contrast (PIC)-mapping and scanning and aberration-corrected transmission electron microscopies. The first… 

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