Siderazot
A valid IMA mineral species
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About Siderazot
Formula:
FeNx to Fe3N1.33
x ~ 0.25-0.5; the epsilon-type structure
Colour:
White, silver-white
Lustre:
Metallic
Specific Gravity:
3.147
Crystal System:
Hexagonal
Name:
From Greek "sideros", iron, plus "azoton", nitrogen, referring to its composition.
Modern confirmation of the chemical composition was lacking for a long time.
It was considered by some to be a "grandfathered" species, but very inadequately described (http://www.mindat.org/mesg-7-73751.html).
Redefined as a valid species by Bette et al. (2021) on a sample of vescicular lava from the Natural History Museum, London, UK, originally collected by Orazio Silvestri during the Etna eruption of 1874.
It was considered by some to be a "grandfathered" species, but very inadequately described (http://www.mindat.org/mesg-7-73751.html).
Redefined as a valid species by Bette et al. (2021) on a sample of vescicular lava from the Natural History Museum, London, UK, originally collected by Orazio Silvestri during the Etna eruption of 1874.
Unique Identifiers
Mindat ID:
3646
Long-form identifier:
mindat:1:1:3646:3
GUID
(UUID V4):
(UUID V4):
cd040c50-7999-4469-ac3c-71f2d1dcbb84
IMA Classification of Siderazot
Approved
IMA status notes:
Redefined by the IMA
IMA Formula:
Fe3N1.33
Approval history:
redefined in 2021 (Newsletter 61)
Classification of Siderazot
1.BC.10
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
C : Nitrides
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
C : Nitrides
Dana 7th ed.:
1.1.27.1
1.1.18.1
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
2.6
2 : Carbides, Nitrides, Silicides and Phosphides
2 : Carbides, Nitrides, Silicides and Phosphides
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Saz | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Siderazot
Metallic
Transparency:
Opaque
Colour:
White, silver-white
Density:
3.147 g/cm3 (Measured) 3.08 g/cm3 (Calculated)
Optical Data of Siderazot
Type:
Uniaxial
Chemistry of Siderazot
Mindat Formula:
FeNx to Fe3N1.33
x ~ 0.25-0.5; the epsilon-type structure
x ~ 0.25-0.5; the epsilon-type structure
Elements listed:
Crystallography of Siderazot
Crystal System:
Hexagonal
Class (H-M):
6 2 2 - Trapezohedral
Space Group:
P63 2 2
Cell Parameters:
a = 4.678 Å, c = 4.369 Å
Ratio:
a:c = 1 : 0.934
Unit Cell V:
82.80 ų (Calculated from Unit Cell)
Z:
1
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0010502 | Siderazot | Hendricks S B, Kosting P R (1930) The crystal structure of Fe2P, Fe2N, Fe3N and FeB Zeitschrift fur Kristallographie 74 511-533 |  | 1930 | synthetic | 0 | 293 |
| 0010503 | Siderazot | Hendricks S B, Kosting P R (1930) The crystal structure of Fe2P, Fe2N, Fe3N and FeB Zeitschrift fur Kristallographie 74 511-533 | | 1930 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.346 Å | (100) |
| 2.196 Å | (100) |
| 2.061 Å | (100) |
| 1.596 Å | (100) |
| 1.349 Å | (100) |
| 1.2355 Å | (100) |
| 1.1484 Å | (100) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Siderazot
Reference:
Silvestri, O. (1876) Das Vorkommen des Stickstoffeisens unter den Fumarolen-Producten des Aetna und Künstliche Darstellung dieser Verbindung. Annalen der Physik und Chemie: 157: 165-172.
Synonyms of Siderazot
Other Language Names for Siderazot
Related Minerals - Strunz-mindat Grouping
| 1.BC. | UM2007-16-N:Ti | Ti7N3 |
| 1.BC. | Qingsongite | BN |
| 1.BC. | Oreillyite | Cr2N |
| 1.BC.05 | Roaldite | (Fe,Ni)4N |
| 1.BC.15 | Carlsbergite | CrN |
| 1.BC.15 | Osbornite | TiN |
| 1.BC.15 | Uakitite | VN |
| 1.BC.20 | UM2006-34-N:Ga | GaN |
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 Siderazot
mindat.org URL:
https://www.mindat.org/min-3646.html
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Please feel free to link to this page.
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References for Siderazot
Reference List:
Localities for Siderazot
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - 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.
Iceland | |
| Färber (n.d.) |
Italy | |
| Russo M. |
| Russo M. |
| Russo et al. (2004) | |
| Russo +2 other references | |
| Pelloux (1927) +3 other references | |
| sintesi e analisi di un nuovo minerale ... +3 other references |
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Somma-Vesuvius Complex, Naples, Campania, Italy