Roaldite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Fe,Ni)4N
Colour:
Tin-white
Lustre:
Metallic
Hardness:
5½ - 6½
Specific Gravity:
7.21 (Calculated)
Crystal System:
Isometric
Name:
Named after Roald Norbach Nielsen (1928 - ), Danish electron-microprobe specialist.
This page provides mineralogical data about Roaldite.
Unique Identifiers
Mindat ID:
3430
Long-form identifier:
mindat:1:1:3430:8
GUID
(UUID V4):
(UUID V4):
ad4626dd-b395-4df7-827c-89310e452fa0
IMA Classification of Roaldite
Approved
First published:
1981
Classification of Roaldite
1.BC.05
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.:
1.1.27.2
1.1.18.2
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
2.12
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 |
|---|---|---|
| Roa | 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 Roaldite
Metallic
Colour:
Tin-white
Hardness:
5½ - 6½ on Mohs scale
Tenacity:
Malleable
Density:
7.21 g/cm3 (Calculated)
Comment:
synthetic
Chemistry of Roaldite
Mindat Formula:
(Fe,Ni)4N
Elements listed:
Common Impurities:
Ni
Crystallography of Roaldite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Pm3n
Cell Parameters:
a = 3.79(4) Å
Unit Cell V:
54.44 ų (Calculated from Unit Cell)
Z:
1
Comment:
synthetic Fe4N is P_43m
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0005250 | Roaldite | Bayliss P (1990) Revised unit cell dimensions, space group, and chemical formula of some metallic minerals The Canadian Mineralogist 28 751-755 |  | 1990 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.684 Å | (20) |
| 2.191 Å | (100) |
| 1.897 Å | (75) |
| 1.342 Å | (65) |
| 1.144 Å | (85) |
| 1.095 Å | (40) |
| 0.949 Å | (45) |
Comments:
Synthetic.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 5 : Primary asteroid phases | 4.566–4.560 |
Type Occurrence of Roaldite
General Appearance of Type Material:
As planar foils, to 2 µm thick but many mm long, forming bursts embedded in kamacite.
Place of Conservation of Type Material:
University of Copenhagen, Copenhagen, Denmark, 1977,540.
Geological Setting of Type Material:
Iron meteorite
Associated Minerals at Type Locality:
Reference:
Buchwald, V.F., Nielsen, H.P. (1981) Roaldite, a new nitride in iron meteorites. Proceedings of Lunar and Planetary Science: 12B: 1343-1348.
Synonyms of Roaldite
Other Language Names for Roaldite
Related Minerals - Strunz-mindat Grouping
| 1.BC. | UM2007-16-N:Ti | Ti7N3 |
| 1.BC. | Qingsongite | BN |
| 1.BC. | Oreillyite | Cr2N |
| 1.BC.10 | Siderazot | FeNx to Fe3N1.33 |
| 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 Roaldite
mindat.org URL:
https://www.mindat.org/min-3430.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Roaldite
Localities for Roaldite
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.
Australia (TL) | |
| |
Denmark | |
| |
Portugal | |
| |
USA | |
|
Quick NavTopUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
