Yarlongite Mineral Data

General Yarlongite Information

Chemical Formula:

(Cr4Fe4Ni)C4

Composition:

Molecular Weight = 538.11 gm

Chromium 38.65 % Cr

Iron 41.51 % Fe

Nickel 10.91 % Ni

Carbon 8.93 % C

______

100.00 %

Empirical Formula:

Cr₄Fe⁰⁺₄NiC₄

Environment:

Hand picked from a large heavy mineral processed sample of chromitite ore.

IMA Status:

Approved IMA 2007 (Dana # Added)

Locality:

Luobusa mine, Qusong County, Tibet, China Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2007-035

Yarlongite Crystallography

Axial Ratios:

a:c = 1:0.23865

Cell Dimensions:

a = 13.839, c = 4.496, Z = 11; V = 745.70 Den(Calc)= 13.18

Crystal System:

Hexagonal - Dihexagonal Pyramidal H-M Symbol (6mm) Space Group: P 6₃mc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Cleavage:

{001} Perfect

Color:

Steel gray.

Diaphaneity:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Metallic

Calculated Properties of Yarlongite

Electron Density:

Bulk Density (Electron Density)=6.66 gm/cc
note: Specific Gravity of Yarlongite =7.11 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Yarlongite= 26.19 barns/electron
U=PE_Yarlongite x rElectron Density= 174.40 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yarlongite is Not Radioactive

Yarlongite Classification

Dana Class:

01.01.26.01 (01)Native Elements

(01.01)with metallic elements other than the platinum group

(01.01.26)Dana Group

01.01.26.01 Yarlongite! (Cr4Fe4Ni)C4 P 6₃mc 6mm

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

References:

PHYS. PROP.(ACTA GEOLOGICA SINICA)

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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Print or Cut-and-Paste your Yarlongite Specimen Label here :

Yarlongite

(Cr4Fe4Ni)C4
Dana No: 01.01.26.01 Strunz No: 01.BA.30
Locality:

Notes:

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