Oreillyite

Cr2N
IMA status
  • Approved
IMA symbol
Ory
IMA approved
2020
Also known as
  • IMA2020-030a
  • Oreillyiet

Where it forms, where it's found

Geological setting

Inclusions in corundum in pyrometamorphic rocks

Type locality
Kishon Mid Reach zone 2
  1. Kishon river
  2. Haifa District
  3. Israel

Physical

Density
6.64 g/cm³

Crystallography

Crystal system
Trigonal
Space group
P-3 1m
Cell parameters
a = 4.7853(5) Å · c = 4.4630(6) Å
Z
3
Type-locality form

one subhedral volume sandwiched between corundum and native chromium

Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
24CrChromiumChromium251.996103.992
88.13%
7NNitrogenNitrogen114.00714.007
11.87%
Total117.999100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • IMA2020-030a
  • Oreillyiet

In other languages

German
IMA 2020-030a · Oreillyit

Classification

Strunz
10th ed.

1.BC

  • 1ElementsClass
  • 1.BMetallic Carbides, Silicides, Nitrides, Phosphides and HydridesDivision
  • 1.BCNitridesGroup
  • 1.BCOreillyiteSpecies

Literature, links & citation

Citations
  1. 2020Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 58. European Journal of Mineralogy, 32 (6) 645-651 doi:10.5194/ejm-32-645-2020 DOI: 10.5194/ejm-32-645-2020
  2. 2020Bindi, Luca, Cámara, Fernando, Gain, Sarah E. M., Griffin, William L., Huang, Jin-Xiang, Saunders, Martin, Toledo, Vered (2020) Kishonite, VH2, and Oreillyite, Cr2N, Two New Minerals from the Corundum Xenocrysts of Mt Carmel, Northern Israel. Minerals, 10 (12) 1118 doi:10.3390/min10121118 DOI: 10.3390/min10121118
  3. 2022(2022) Oreillyite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Oreillyite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/oreillyite-55257},
  note      = {Accessed 2026-05-11}
}