Discovery of an Earthborn quasicrystal approximant

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169684" target="_blank" >RIV/00025798:_____/25:10169684 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.2138/am-2024-9679" target="_blank" >https://doi.org/10.2138/am-2024-9679</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2138/am-2024-9679" target="_blank" >10.2138/am-2024-9679</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Discovery of an Earthborn quasicrystal approximant

Popis výsledku v původním jazyce

Natural quasicrystals, compounds with characteristics intermediate between crystalline material and glass, have been so far discovered in extraterrestrial materials only. Furthermore, their occurrence in nature is limited to metallic, Al-bearing alloys. The presence of metallic aluminum in these minerals raised doubts about their potential occurrence in terrestrial rocks. The geochemical conditions needed to form metallic Al are so reducing that they are considered very unlikely in a terrestrial environment. Given the report of dodecagonal symmetry in the synthetic Ta1.6Te quasicrystal, the search for terrestrial quasicrystals was focused on natural tellurides.Here, we report the discovery of the first terrestrial approximant of a dodecagonal quasicrystal, a Pd-Ni-telluride with formula Pd3Ni4Te8 and tetragonal symmetry, which was found as small inclusions in a rock sample from Kalgoorlie, Western Australia. Periodic approximants are crystalline materials that share a similar chemical composition with quasicrystals but have a slightly altered atomic structure, aligning their symmetry with the traditional principles of three-dimensional crystallography. These crystalline approximants provide insights into the local atomic structure of their corresponding quasicrystals.Natural Pd3Ni4Te8 has been approved as a new mineral by the International Mineralogical Association with the name proxitwelvefoldite (IMA 2024-034). The Pd3Ni4Te8 composition has never been reported to form quasicrystal approximants among synthetic products and could indicate the possible existence of a 12-fold quasicrystal in the Pd-Ni-Te system. The discovery points to the possibility that the quasicrystalline structure may be much more common than previously thought, even in non-alloy systems.

Název v anglickém jazyce

Discovery of an Earthborn quasicrystal approximant

Popis výsledku anglicky

Natural quasicrystals, compounds with characteristics intermediate between crystalline material and glass, have been so far discovered in extraterrestrial materials only. Furthermore, their occurrence in nature is limited to metallic, Al-bearing alloys. The presence of metallic aluminum in these minerals raised doubts about their potential occurrence in terrestrial rocks. The geochemical conditions needed to form metallic Al are so reducing that they are considered very unlikely in a terrestrial environment. Given the report of dodecagonal symmetry in the synthetic Ta1.6Te quasicrystal, the search for terrestrial quasicrystals was focused on natural tellurides.Here, we report the discovery of the first terrestrial approximant of a dodecagonal quasicrystal, a Pd-Ni-telluride with formula Pd3Ni4Te8 and tetragonal symmetry, which was found as small inclusions in a rock sample from Kalgoorlie, Western Australia. Periodic approximants are crystalline materials that share a similar chemical composition with quasicrystals but have a slightly altered atomic structure, aligning their symmetry with the traditional principles of three-dimensional crystallography. These crystalline approximants provide insights into the local atomic structure of their corresponding quasicrystals.Natural Pd3Ni4Te8 has been approved as a new mineral by the International Mineralogical Association with the name proxitwelvefoldite (IMA 2024-034). The Pd3Ni4Te8 composition has never been reported to form quasicrystal approximants among synthetic products and could indicate the possible existence of a 12-fold quasicrystal in the Pd-Ni-Te system. The discovery points to the possibility that the quasicrystalline structure may be much more common than previously thought, even in non-alloy systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

<a href="/cs/project/GA22-26485S" target="_blank" >GA22-26485S: Syntetické minerály skupiny Pt-kovů a jejich využití</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

American Mineralogist

ISSN

0003-004X

e-ISSN

1945-3027

Svazek periodika

110

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

650-654

Kód UT WoS článku

001457462200008

EID výsledku v databázi Scopus

2-s2.0-105002174726