Research Mentor(s)
Rice, Melissa S.
Description
In order to better understand the reactions that form intercalated clays in carbonaceous chondritic (CC) meteorites, a suite of six combinations of nontronite plus fine-grained metal, organics, or sulfur ± water were heated at a temperature of 200°C in sealed Parr bomb containers for a period of three months. Intercalation is the process of materials being introduced between the layers of expandable clays via cation exchange. Reflectance spectra of CC meteorites differ from those of mixtures of the end members made physically in that the CC spectra are darker and show extremely subdued absorption bands of the phyllosilicates (clays) that they contain relative to the mechanical mixtures. This is likely due to the fact that the clays in CCs contain darkening agents, such as organics, magnetite, iron sulfides in intimate association with the clays (i.e., between individual phyllosilicate sheets) that a mechanical mixture cannot reproduce.
Document Type
Event
Start Date
18-5-2017 9:00 AM
End Date
18-5-2017 12:00 PM
Department
Geology
Genre/Form
student projects; posters
Subjects – Topical (LCSH)
Clay catalysts--Properties; Solids--Reactivity
Type
Image
Rights
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this documentation for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.
Language
English
Format
application/pdf
Included in
Recreating Intercalated Clays of Chondritic Meteorites
In order to better understand the reactions that form intercalated clays in carbonaceous chondritic (CC) meteorites, a suite of six combinations of nontronite plus fine-grained metal, organics, or sulfur ± water were heated at a temperature of 200°C in sealed Parr bomb containers for a period of three months. Intercalation is the process of materials being introduced between the layers of expandable clays via cation exchange. Reflectance spectra of CC meteorites differ from those of mixtures of the end members made physically in that the CC spectra are darker and show extremely subdued absorption bands of the phyllosilicates (clays) that they contain relative to the mechanical mixtures. This is likely due to the fact that the clays in CCs contain darkening agents, such as organics, magnetite, iron sulfides in intimate association with the clays (i.e., between individual phyllosilicate sheets) that a mechanical mixture cannot reproduce.
Comments
Outstanding Poster Award Recipient