Mineralogy Database

Roaldite Mineral Data

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General Roaldite Information

Help on Chemical  Formula: Chemical Formula: (Fe,Ni)4N
Help on Composition: Composition: Molecular Weight = 237.96 gm
   Iron      89.18 %  Fe
   Nickel     4.93 %  Ni
   Nitrogen   5.89 %  N
            100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+3.8Ni0.2N
Help on Environment: Environment: Platelets in kamacite phase of coarse octahedrites.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Jerslev meteorite, Sjaelland, Denmark and Youndegin meteorite, Avon, Western Australia, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1981 for Roald Nielsen (b.1928), Danish metallurgist.
Help on Name Pronunciation: Name Pronunciation: Roaldite Say ROALDITE
Help on Synonym: Synonym: ICSD 79980
  PDF 6-627

Roaldite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 3.79, Z = 1; V = 54.44 Den(Calc)= 7.26
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.191(1), 1.144(0.85), 1.897(0.75),

Physical Properties of Roaldite

Help on Color: Color: Tin white.
Help on Density: Density: 7.21
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 5.5-6.5 - Knife Blade-Pyrite
Help on Luster: Luster: Metallic

Calculated Properties of Roaldite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.80 gm/cc
note: Specific Gravity of Roaldite =7.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PERoaldite = 29.58 barns/electron
U=PERoaldite x rElectron Density= 201.06 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Roaldite is Not Radioactive

Roaldite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.01)with metallic elements other than the platinum group
  (01.01.18)Dana Group Siderazot Fe5N2 P 6322 6 2 2 Roaldite (Fe,Ni)4N P 43m 4 3m
Help on  Strunz Class: Strunz Class: 01.BC.05 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.B - Metallic Carbides, Silicides, Nitrides and Phosphides
  01.BC -Nitrides
01.BC.05 Roaldite (Fe,Ni)4N P 43m 4 3m

Other Roaldite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Roaldite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 01.BC.05