Mineralogy Database

Yarlongite Mineral Data

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General Yarlongite Information

Help on Chemical  Formula: Chemical Formula: (Cr4Fe4Ni)C4
Help on Composition: Composition: Molecular Weight = 538.11 gm
   Chromium  38.65 %  Cr
   Iron      41.51 %  Fe
   Nickel    10.91 %  Ni
   Carbon     8.93 %  C
            100.00 % 
Help on Empirical Formula: Empirical Formula: Cr4Fe0+4NiC4
Help on Environment: Environment: Hand picked from a large heavy mineral processed sample of chromitite ore.
Help on IMA Status: IMA Status: Approved IMA 2007 (Dana # Added)
Help on Locality: Locality: Luobusa mine, Qusong County, Tibet, China Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2007-035

Yarlongite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.23865
Help on Cell Dimensions: Cell Dimensions: a = 13.839, c = 4.496, Z = 11; V = 745.70 Den(Calc)= 13.18
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Pyramidal H-M Symbol (6mm) Space Group: P 63mc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.92(1), 2.023(0.98), 3.596(0.55),1.825(0.47), 1.798(0.45), 2.493(0.36), 4.53(0.35), 1.998(0.32),

Physical Properties of Yarlongite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Steel gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Metallic

Calculated Properties of Yarlongite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.66 gm/cc
note: Specific Gravity of Yarlongite =7.11 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEYarlongite = 26.19 barns/electron
U=PEYarlongite x rElectron Density= 174.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yarlongite is Not Radioactive

Yarlongite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.01)with metallic elements other than the platinum group
  (01.01.26)Dana Group Yarlongite! (Cr4Fe4Ni)C4 P 63mc 6mm
Help on  Strunz Class: Strunz Class: 01.BA.30 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.B - Metallic Carbides, Silicides, Nitrides and Phosphides
  01.BA -Carbides
01.BA.30 Yarlongite! (Cr4Fe4Ni)C4 P 63mc 6mm

Other Yarlongite Information

Help on References: References: PHYS. PROP.(ACTA GEOLOGICA SINICA)
Help on See Also: See Also: Links to other databases for Yarlongite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 01.BA.30