Cargando…
Mineral Surface Rearrangement at High Temperatures: Implications for Extraterrestrial Mineral Grain Reactivity
[Image: see text] Mineral surfaces play a critical role in the solar nebula as a catalytic surface for chemical reactions and potentially acted as a source of water during Earth’s accretion by the adsorption of water molecules to the surface of interplanetary dust particles. However, nothing is know...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2017
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5407656/ https://www.ncbi.nlm.nih.gov/pubmed/28470055 http://dx.doi.org/10.1021/acsearthspacechem.6b00016 |
_version_ | 1783232163603283968 |
---|---|
author | King, Helen E. Plümper, Oliver Putnis, Christine V. O’Neill, Hugh St. C. Klemme, Stephan Putnis, Andrew |
author_facet | King, Helen E. Plümper, Oliver Putnis, Christine V. O’Neill, Hugh St. C. Klemme, Stephan Putnis, Andrew |
author_sort | King, Helen E. |
collection | PubMed |
description | [Image: see text] Mineral surfaces play a critical role in the solar nebula as a catalytic surface for chemical reactions and potentially acted as a source of water during Earth’s accretion by the adsorption of water molecules to the surface of interplanetary dust particles. However, nothing is known about how mineral surfaces respond to short-lived thermal fluctuations that are below the melting temperature of the mineral. Here we show that mineral surfaces react and rearrange within minutes to changes in their local environment despite being far below their melting temperature. Polished surfaces of the rock and planetary dust-forming silicate mineral olivine ((Mg,Fe)(2)SiO(4)) show significant surface reorganization textures upon rapid heating resulting in surface features up to 40 nm in height observed after annealing at 1200 °C. Thus, high-temperature fluctuations should provide new and highly reactive sites for chemical reactions on nebula mineral particles. Our results also may help to explain discrepancies between short and long diffusion profiles in experiments where diffusion length scales are of the order of 100 nm or less. |
format | Online Article Text |
id | pubmed-5407656 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-54076562017-05-01 Mineral Surface Rearrangement at High Temperatures: Implications for Extraterrestrial Mineral Grain Reactivity King, Helen E. Plümper, Oliver Putnis, Christine V. O’Neill, Hugh St. C. Klemme, Stephan Putnis, Andrew ACS Earth Space Chem [Image: see text] Mineral surfaces play a critical role in the solar nebula as a catalytic surface for chemical reactions and potentially acted as a source of water during Earth’s accretion by the adsorption of water molecules to the surface of interplanetary dust particles. However, nothing is known about how mineral surfaces respond to short-lived thermal fluctuations that are below the melting temperature of the mineral. Here we show that mineral surfaces react and rearrange within minutes to changes in their local environment despite being far below their melting temperature. Polished surfaces of the rock and planetary dust-forming silicate mineral olivine ((Mg,Fe)(2)SiO(4)) show significant surface reorganization textures upon rapid heating resulting in surface features up to 40 nm in height observed after annealing at 1200 °C. Thus, high-temperature fluctuations should provide new and highly reactive sites for chemical reactions on nebula mineral particles. Our results also may help to explain discrepancies between short and long diffusion profiles in experiments where diffusion length scales are of the order of 100 nm or less. American Chemical Society 2017-03-31 2017-04-20 /pmc/articles/PMC5407656/ /pubmed/28470055 http://dx.doi.org/10.1021/acsearthspacechem.6b00016 Text en Copyright © 2017 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | King, Helen E. Plümper, Oliver Putnis, Christine V. O’Neill, Hugh St. C. Klemme, Stephan Putnis, Andrew Mineral Surface Rearrangement at High Temperatures: Implications for Extraterrestrial Mineral Grain Reactivity |
title | Mineral
Surface Rearrangement at High Temperatures:
Implications for Extraterrestrial Mineral Grain Reactivity |
title_full | Mineral
Surface Rearrangement at High Temperatures:
Implications for Extraterrestrial Mineral Grain Reactivity |
title_fullStr | Mineral
Surface Rearrangement at High Temperatures:
Implications for Extraterrestrial Mineral Grain Reactivity |
title_full_unstemmed | Mineral
Surface Rearrangement at High Temperatures:
Implications for Extraterrestrial Mineral Grain Reactivity |
title_short | Mineral
Surface Rearrangement at High Temperatures:
Implications for Extraterrestrial Mineral Grain Reactivity |
title_sort | mineral
surface rearrangement at high temperatures:
implications for extraterrestrial mineral grain reactivity |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5407656/ https://www.ncbi.nlm.nih.gov/pubmed/28470055 http://dx.doi.org/10.1021/acsearthspacechem.6b00016 |
work_keys_str_mv | AT kinghelene mineralsurfacerearrangementathightemperaturesimplicationsforextraterrestrialmineralgrainreactivity AT plumperoliver mineralsurfacerearrangementathightemperaturesimplicationsforextraterrestrialmineralgrainreactivity AT putnischristinev mineralsurfacerearrangementathightemperaturesimplicationsforextraterrestrialmineralgrainreactivity AT oneillhughstc mineralsurfacerearrangementathightemperaturesimplicationsforextraterrestrialmineralgrainreactivity AT klemmestephan mineralsurfacerearrangementathightemperaturesimplicationsforextraterrestrialmineralgrainreactivity AT putnisandrew mineralsurfacerearrangementathightemperaturesimplicationsforextraterrestrialmineralgrainreactivity |