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Expandable Sepiolite from Ninetyeast Ridge, Indian Ocean

Published online by Cambridge University Press:  02 April 2024

Scott Argast
Scott Argast*
Affiliation:
Department of Earth and Space Sciences, Indiana University-Purdue University at Fort Wayne, Fort Wayne, Indiana 46805
*
1Correspondence as: Scott Argast, Department of Earth and Space Sciences, Indiana-Purdue University at Fort Wayne, 2101 Coliseum Blvd., East Fort Wayne, IN 46805-1499.
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Abstract

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The structure of sepiolite from a piston core obtained on Ninetyeast Ridge in the Indian Ocean was modified by exposure to ethylene glycol vapor. With ethylene glycol, the sepiolite Oil X-ray powder diffraction peak expanded from 12.4 to 12.8 Å, and the 130 peak contracted from 4.53 to about 4.45 Å. The cell modification is consistent with concomitant expansion along the c-axis and contraction along the b-axis. This structural distortion is not permanent, however, inasmuch as the sepiolite returned to its original state 6 to 12 hr after it was removed from the ethylene glycol-saturated atmosphere.

Keywords

Chemical compositionEthylene glycolExpansionSepioliteX-ray powder diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 4 , August 1989 , pp. 371 - 376
Copyright
Copyright © 1989, The Clay Minerals Society

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