Decagonite

Where it forms, where it's found

Geological setting: CV2 carbonaceous chondrite meteorite.
Type locality: Khatyrka meteorite
Iomrautvaam massif
Anadyrsky District
Chukotka Autonomous Okrug
Russia
62.6531°, 174.5006°

1recorded occurrences

Source · OpenStreetMap

Physical

Colour: Gray to black

Crystallography

Crystal system: Icosahedral
Type-locality form: anhedral, up to 60 μm across
Comment: P105/mmc.

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
13AlAluminium Aluminium 71 26.982 1915.722
53.16%
28NiNickel Nickel 24 58.693 1408.632
39.09%
26FeIron Iron 5 55.845 279.225
7.75%
Total 3603.579 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From IMA formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
13AlAluminium	Aluminium	71	26.982	1915.722	53.16%
28NiNickel	Nickel	24	58.693	1408.632	39.09%
26FeIron	Iron	5	55.845	279.225	7.75%
	Total	3603.579	100.00%

Synonyms

Decagoniet
IMA2015-017
Unnamed (Al-Ni-Fe Quasicrystal)

In other languages

German: Decagonit · IMA 2015-017
Italian: decagonite

Classification

Strunz

10th ed.

1.AH

1ElementsClass
1.AMetals and Intermetallic AlloysDivision
1.AHMiscellaneous Elements, alloysGroup
1.AHDecagoniteSpecies

Literature, links & citation

Citations

2015Bindi, Luca; Yao, Nan; Lin, Chaney; Hollister, Lincoln S.; Andronicos, Christopher L.; Distler, Vadim V.; Eddy, Michael P.; Kostin, Alexander; Kryachko, Valery; MacPherson, Glenn J.; et al. (2015) Natural quasicrystal with decagonal symmetry. Scientific Reports, 5 (1). 9111 doi:10.1038/srep09111DOI: 10.1038/srep09111
2015Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015, CNMNC Newsletter No 25. Mineralogical Magazine, 79 (3) 529-535 doi:10.1180/minmag.2015.079.3.02DOI: 10.1180/minmag.2015.079.3.02
2015Bindi, Luca, Yao, Nan, Lin, Chaney, Hollister, Lincoln S., Andronicos, Christopher L., Distler, Vadim V., Eddy, Michael P., Kostin, Alexander, Kryachko, Valery, MacPherson, Glenn J., Steinhardt, William M., Yudovskaya, Marina, Steinhardt, Paul J. (2015) Decagonite, Al₇₁Ni₂₄Fe₅, a quasicrystal with decagonal symmetry from the Khatyrka CV3 carbonaceous chondrite. American Mineralogist, 100 (10) 2340-2343 doi:10.2138/am-2015-5423 DOI: 10.2138/am-2015-5423
2022(2022) Decagonite. Handbook of Mineralogy. Mineralogical Society of America
2023Pereti, Claudio; Bernot, Kevin; Guizouarn, Thierry; Laufek, František; Vymazalová, Anna; Bindi, Luca; Sessoli, Roberta; Fanelli, Duccio (2023) From individual elements to macroscopic materials: in search of new superconductors via machine learning. npj Computational Materials, 9 (1). 71 doi:10.1038/s41524-023-01023-6DOI: 10.1038/s41524-023-01023-6

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Decagonite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/decagonite-46637},
  note      = {Accessed 2026-05-11}
}