Iron Mineral Data

Iron Mineral Data +

General Iron Information

Chemical Formula:

Composition:

Molecular Weight = 55.85 gm

Iron 100.00 % Fe

______

100.00 %

Empirical Formula:

Fe⁰⁺

Environment:

In meteorites and rarely basalts that have intruded carbon-rich sediments.

IMA Status:

Valid Species (Pre IMA) 900 BC (Dana # Added)

Locality:

Asteroid fragments and in German and Greenland basalts. Link to MinDat.org Location Data.

Name Origin:

Probably Anglo-Saxon in origin.

Synonym:

Eisen

Fer

ICSD 64795

PDF 6-696

Iron Image

Images:

Iron

Comments: Specimen of volcanic rock containing dark gray grains of native Iron. This locality is one of the very few known localities for terrestrial native iron.
Location: Disko Island, Greenland. Scale: Picture size 1 cm.
© John Veevaert

Iron Crystallography

Cell Dimensions:

a = 2.874, Z = 2; V = 23.74 Den(Calc)= 7.81

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I m3m

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

By Intensity(I/I_o): 2.0268(1), 1.1702(0.3), 1.4332(0.2),

Crystal Structure:

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Wilburn D R , Bassett W A , American Mineralogist , 63 (1978) p.591-596, Hydrostatic compression of iron and related compounds: An overview, P = 1 Kbar

View Additional jPOWD Structure files for Iron
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [30] [31] [32] [33] [34] [35] [36] [37] [4] [5] [6] [7] [8] [9]

Physical Properties of Iron

Cleavage:

[001] Perfect, [010] Perfect, [100] Perfect

Color:

Iron black, Dark gray, Steel gray.

Density:

7.3 - 7.9, Average = 7.6

Diaphaniety:

Opaque

Fracture:

Hackly - Jagged, torn surfaces, (e.g. fractured metals).

Habit:

Disseminated - Occurs in small, distinct particles dispersed in matrix.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4-5 - Fluorite-Apatite

Luminescence:

None.

Luster:

Metallic

Magnetism:

Naturally strong

Streak:

gray

Optical Properties of Iron

RL Color:

White.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Iron in Air**
λ	R	∑ R(λ)
400 nm	51.30
420 nm	52.20
440 nm	53.10
460 nm	54.00
480 nm	54.80
500 nm	55.60
520 nm	56.20
540 nm	56.80
560 nm	57.30
580 nm	57.80
600 nm	58.40
620 nm	59.00
640 nm	59.60
660 nm	60.20
680 nm	61.00
700 nm	61.80

**Calculated Relative Intensity Colors of Iron in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	170%
R

Calculated Properties of Iron

Electron Density:

r_electron=7.27 gm/cc
note: r_Iron=7.81 gm/cc.

Fermion Index

Fermion Index = 0.0212
Boson Index = 0.9788

Photoelectric:

PE_Iron= 31.03 barns/electron
U=PE_Iron x r_electron= 225.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Iron is Not Radioactive

Iron Classification

Dana Class:

1.1.11.0 (1)Native Elements

(1.1)with metallic elements other than the platinum group

(1.1.11)Iron-Nickel group

1.1.11.0 Iron ! Fe I m3m 4/m 3 2/m

1.1.11.1 Kamacite alpha-(Fe,Ni) F m3m 4/m 3 2/m

1.1.11.2 Taenite gamma-(Fe,Ni) F m3m 4/m 3 2/m

1.1.11.3 Tetrataenite FeNi P 4/mmm 4/m 2/m 2/m

1.1.11.4 Awaruite Ni2FetoNi3Fe P m3m 4/m 3 2/m

1.1.11.5 Nickel Ni F m3m 4/m 3 2/m

1.1.11.6 Wairauite CoFe P m3m 4/m 3 2/m

Strunz Class:

I/A.07-10 I - Elements

I/A - Metallic and intermetallic compounds, Carbides, Nitrides, Phosphides and Silicides

I/A.07 - Iron series

I/A.07-10 Iron Fe I m3m 4/m 3 2/m

I/A.07-20 Kamacite alpha-(Fe,Ni) F m3m 4/m 3 2/m

I/A.07-30 Wairauite CoFe P m3m 4/m 3 2/m

Other Iron Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

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Iron

Fe
Dana No: 1.1.11.0 Strunz No: I/A.07-10
Locality:

Notes: