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Unnamed (Iron Nitride II)
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Formula:
Fe2N
Crystal System:
Orthorhombic
Another Fe nitride after the already known species: roaldite and siderazot.
Found as elongated inclusions, 8-10 microns in size, within lower-mantle diamond. May be intergrown with its replacement graphite. The individual grains are 0.5-1.5 microns in size.
Co-described with associated 'Unnamed (Iron Carbonitride)', 'Unnamed (Iron Nitride I)', 'Unnamed (Iron Carbide)', silicon carbide (possibly moissanite), Mn-rich xieite, and other oxide(s). Other, earlier phases coexisting, are nyerereite, nahcolite, calcite, and periclase.
The phase is among a solid solution(s) thay may be described as M5(C,N)3 - M23(C,N)6, with M/(C,N) ratio in the 1.65 to 3.98 range.
Likely formed due to infiltration of liquid metal (with some lighter elements), coming from the outer core to the D" layer.
Found as elongated inclusions, 8-10 microns in size, within lower-mantle diamond. May be intergrown with its replacement graphite. The individual grains are 0.5-1.5 microns in size.
Co-described with associated 'Unnamed (Iron Carbonitride)', 'Unnamed (Iron Nitride I)', 'Unnamed (Iron Carbide)', silicon carbide (possibly moissanite), Mn-rich xieite, and other oxide(s). Other, earlier phases coexisting, are nyerereite, nahcolite, calcite, and periclase.
The phase is among a solid solution(s) thay may be described as M5(C,N)3 - M23(C,N)6, with M/(C,N) ratio in the 1.65 to 3.98 range.
Likely formed due to infiltration of liquid metal (with some lighter elements), coming from the outer core to the D" layer.
Unique Identifiers
Mindat ID:
51708
Long-form identifier:
mindat:1:1:51708:3
Chemistry of Unnamed (Iron Nitride II)
Mindat Formula:
Fe2N
Elements listed:
Crystallography of Unnamed (Iron Nitride II)
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcn
Setting:
Pbcn
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Unnamed (Iron Nitride II)
mindat.org URL:
https://www.mindat.org/min-51708.html
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References for Unnamed (Iron Nitride II)
Localities for Unnamed (Iron Nitride II)
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Brazil | |
| Kaminsky et al. (2017) +1 other reference |
