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Crystal structure of nesquehonite, MgCO$$_{3}$$ $$cdot$$ 3H(D)$$_{2}$$O by neutron diffraction and effect of pH on structural formulas of nesquehonite

Yamamoto, Genichiro*; Kyono, Atsushi*; Abe, Jun*; Sano, Asami   ; Hattori, Takanori   

Neutron diffraction, Raman spectroscopy, and thermal analysis were performed to investigate the composition, structure, and formation conditions of the magnesium carbonate hydrate nesquehonite. The time-of-flight neutron diffraction revealed the crystal structure of the monoclinic space group $$P$$2$$_{1}/n$$ with lattice parameters of $$a$$=7.72100(12)$AA, $b$$=5.37518(7)$AA, $c$$=12.1430(3)$AA, $beta$$=90.165(4)$$^circ$$, in which two deuterium atoms are coordinated to the O1, O2, and O6 atoms to form water molecules. The three water molecules in the structure suggests the structural formula of the nesquehonite should be MgCO$$_{3}$$ $$cdot$$ 3H$$_{2}$$O rather than Mg(HCO$$_{3}$$)(OH) $$cdot $$2H$$_{2}$$O.

Language

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English

Journal

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Journal of Mineralogical and Petrological Sciences

Volume

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116

Number

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2

Pages

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p.96 - 103

Publication Year/Month

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2021/04

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.2465/jmps.200117

DOI for research data

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Keywords

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nesquehonite; 中性子回折

Research Facility

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J-PARC物質・生命科学実験施設  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:51.59

Category:Mineralogy

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