2014
DOI: 10.1038/ncomms5040
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Abstract: The discovery of a natural quasicrystal, icosahedrite (Al 63 Cu 24 Fe 13 ), accompanied by khatyrkite (CuAl 2 ) and cupalite (CuAl) in the CV3 carbonaceous chondrite Khatyrka has posed a mystery as to what extraterrestrial processes led to the formation and preservation of these metal alloys. Here we present a range of evidence, including the discovery of high-pressure phases never observed before in a CV3 chondrite, indicating that an impact shock generated a heterogeneous distribution of pressures and temper… Show more

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Cited by 73 publications
(80 citation statements)
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“…The fact that these natural QCs were contacted with stishovite provides strong evidence for ultra-high pressure formation [1,2]. Bindi and coworkers therefore suggested that the Khatyrka meteorite was formed in early solar system about 4.5 Gya and experienced at least 5 GPa and 1200°C [3,4]. However, presence of metallic Al and Cu with the natural QCs requiring a highly reducing environment is still puzzling.…”
Section: Introductionmentioning
confidence: 99%
“…The fact that these natural QCs were contacted with stishovite provides strong evidence for ultra-high pressure formation [1,2]. Bindi and coworkers therefore suggested that the Khatyrka meteorite was formed in early solar system about 4.5 Gya and experienced at least 5 GPa and 1200°C [3,4]. However, presence of metallic Al and Cu with the natural QCs requiring a highly reducing environment is still puzzling.…”
Section: Introductionmentioning
confidence: 99%
“…Quasicrystals can be synthesized in the laboratory by mixing precise ratios of selected elemental components in the liquid and quenching under strictly controlled conditions ranging from rapid to moderately slow (3,4). Nonetheless, the finding of two natural quasicrystals (5)(6)(7)(8) in the Khatyrka meteorite (9), which displays clear evidence of a shock generated by a high-velocity impact event (10), introduced a dramatic new possible mechanism of quasicrystal formation. Here, we report the results of a shock recovery experiment designed to reproduce some aspects of a collision that may have occurred between extraterrestrial bodies.…”
mentioning
confidence: 99%
“…In the Khatyrka meteoritic fragments recovered during the expedition, which present a range of evidence indicating that an impact shock generated a heterogeneous distribution of pressures and temperatures in which some portions of the meteorite reached at least 5 GPa and 1200ºC (Hollister et al, 2014), the second natural quasicrystal has been found (Bindi et al, 2015a). The quasicrystal has the composition Al 71 Ni 24 Fe 5 and is the first known natural quasicrystal with decagonal symmetry, a periodic stacking of layers containing quasiperiodic atomic arrangements with ten-fold symmetry.…”
Section: The Cylindrite-type Mineralsmentioning
confidence: 99%