Investigation of the structure of ettringite by time-of-flight neutron powder diffraction techniques

Journal Article · Wed Feb 15 00:00:00 EST 2006 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2005.0· OSTI ID:20793275

Hartman, M R ^[1]; Berliner, R ^[1]

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1. University of Michigan, Ann Arbor, MI 48109 (United States)

The crystalline structure of ettringite, Ca{sub 6}[Al(OH){sub 6}]{sub 2}(SO{sub 4}){sub 3}.{approx}26H{sub 2}O, was investigated using high-resolution time-of-flight neutron powder diffraction techniques. The powder diffraction data were subjected to Rietveld crystal structure refinement. The resultant ettringite crystal structure confirmed the positions of Ca, Al, and S atoms while permitting a more precise determination of the locations of O and H atomic positions than in previous X-ray and neutron diffraction studies. A discussion of the ettringite hydrogen bonding network is presented, illustrating the role of hydrogen bonding in the stabilization of the ettringite structure.

• OSTI ID: 20793275
• Journal Information: Cement and Concrete Research, Vol. 36, Issue 2; Other Information: DOI: 10.1016/j.cemconres.2005.08.004; PII: S0008-8846(05)00192-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
CALCIUM COMPOUNDS
CEMENTS
CRYSTAL STRUCTURE
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
STABILIZATION
SULFATES
TIME-OF-FLIGHT METHOD
X-RAY DIFFRACTION