Solid-state chemistry: A hydrated crystalline calcium carbonate phase: Calcium carbonate hemihydrate

Zhaoyong Zou, Wouter J.E.M. Habraken, Galina Matveeva, Anders C.S. Jensen, Luca Bertinetti, Matthew A. Hood, Chang Yu Sun, Pupa U.P.A. Gilbert, Iryna Polishchuk, Boaz Pokroy, Julia Mahamid, Yael Politi, Steve Weiner, Peter Werner, Sebastian Bette, Robert Dinnebier, Ute Kolb, Emil Zolotoyabko, Peter Fratzl

Research output: Contribution to journalArticlepeer-review

Abstract

As one of the most abundant materials in the world, calcium carbonate, CaCO 3 , is the main constituent of the skeletons and shells of various marine organisms. It is used in the cement industry and plays a crucial role in the global carbon cycle and formation of sedimentary rocks. For more than a century, only three polymorphs of pure CaCO 3 -calcite, aragonite, and vaterite-were known to exist at ambient conditions, as well as two hydrated crystal phases, monohydrocalcite (CaCO 3 1H 2 O) and ikaite (CaCO 3 6H 2 O).While investigating the role of magnesium ions in crystallization pathways of amorphous calcium carbonate, we unexpectedly discovered an unknown crystalline phase, hemihydrate CaCO 3 =H 2 O, with monoclinic structure.This discovery may have important implications in biomineralization, geology, and industrial processes based on hydration of CaCO 3 .

Original languageEnglish
Pages (from-to)396-400
Number of pages5
JournalScience
Volume363
Issue number6425
DOIs
StatePublished - 25 Jan 2019

All Science Journal Classification (ASJC) codes

  • General

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