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Title: Shock synthesis of quasicrystals with implications for their origin in asteroid collisions

Abstract

Here, we designed a plate impact shock recovery experiment to simulate the starting materials and shock conditions associated with the only known natural quasicrystals, in the Khatyrka meteorite. At the boundaries among CuAl5, (Mg 0.75Fe 0.25 2+) 2SiO 4 olivine, and the stainless steel chamber walls, the recovered specimen contains numerous micron-scale grains of a quasicrystalline phase displaying face-centered icosahedral symmetry and low phason strain. The compositional range of the icosahedral phase is Al 68-73Fe 11-16Cu 10-12Cr 1-4Ni 1-2 and extends toward higher Al/(Cu+Fe) and Fe/Cu ratios than those reported for natural icosahedrite or for any previously known synthetic quasicrystal in the Al-Cu-Fe system. The shock-induced synthesis demonstrated in this experiment reinforces the evidence that natural quasicrystals formed during a shock event but leaves open the question of whether this synthesis pathway is attributable to the expanded thermodynamic stability range of the quasicrystalline phase at high pressure, to a favorable kinetic pathway that exists under shock conditions, or to both thermodynamic and kinetic factors.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [4];  [2];  [2]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  2. Princeton Univ., Princeton, NJ (United States)
  3. Univ. degli Studi di Firenze, Firenze (Italy); CNR-Istituto di Geoscienze e Georisorse, Firenze (Italy)
  4. Univ. of Nevada, Las Vegas, NV (United States)
Publication Date:
Research Org.:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
US National Science Foundation (NSF) EAR-1426526 University of Firenze, Italy NSF-MRSEC Program through New York University DMR-0820341 NSF-MRSEC Program through Princeton Center for Complex Materials DMR-0819860 NSF EAR-0318518 DMR-0080065
OSTI Identifier:
1332397
Grant/Contract Number:  
NA0001982
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 26; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; icosahedrite; shock metamorphism; alloys; meteorites; quasicrystals

Citation Formats

Asimow, Paul D., Lin, Chaney, Bindi, Luca, Ma, Chi, Tschauner, Oliver, Hollister, Lincoln S., and Steinhardt, Paul J. Shock synthesis of quasicrystals with implications for their origin in asteroid collisions. United States: N. p., 2016. Web. doi:10.1073/pnas.1600321113.
Asimow, Paul D., Lin, Chaney, Bindi, Luca, Ma, Chi, Tschauner, Oliver, Hollister, Lincoln S., & Steinhardt, Paul J. Shock synthesis of quasicrystals with implications for their origin in asteroid collisions. United States. doi:10.1073/pnas.1600321113.
Asimow, Paul D., Lin, Chaney, Bindi, Luca, Ma, Chi, Tschauner, Oliver, Hollister, Lincoln S., and Steinhardt, Paul J. Tue . "Shock synthesis of quasicrystals with implications for their origin in asteroid collisions". United States. doi:10.1073/pnas.1600321113. https://www.osti.gov/servlets/purl/1332397.
@article{osti_1332397,
title = {Shock synthesis of quasicrystals with implications for their origin in asteroid collisions},
author = {Asimow, Paul D. and Lin, Chaney and Bindi, Luca and Ma, Chi and Tschauner, Oliver and Hollister, Lincoln S. and Steinhardt, Paul J.},
abstractNote = {Here, we designed a plate impact shock recovery experiment to simulate the starting materials and shock conditions associated with the only known natural quasicrystals, in the Khatyrka meteorite. At the boundaries among CuAl5, (Mg0.75Fe0.252+)2SiO4 olivine, and the stainless steel chamber walls, the recovered specimen contains numerous micron-scale grains of a quasicrystalline phase displaying face-centered icosahedral symmetry and low phason strain. The compositional range of the icosahedral phase is Al68-73Fe11-16Cu10-12Cr1-4Ni1-2 and extends toward higher Al/(Cu+Fe) and Fe/Cu ratios than those reported for natural icosahedrite or for any previously known synthetic quasicrystal in the Al-Cu-Fe system. The shock-induced synthesis demonstrated in this experiment reinforces the evidence that natural quasicrystals formed during a shock event but leaves open the question of whether this synthesis pathway is attributable to the expanded thermodynamic stability range of the quasicrystalline phase at high pressure, to a favorable kinetic pathway that exists under shock conditions, or to both thermodynamic and kinetic factors.},
doi = {10.1073/pnas.1600321113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 26,
volume = 113,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 9 works
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Works referenced in this record:

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