Suessite Mineral Data

Suessite Mineral Data +

General Suessite Information

Chemical Formula:

(Fe,Ni)3Si

Composition:

Molecular Weight = 197.76 gm

Iron 63.54 % Fe

Silicon 14.20 % Si

Nickel 22.26 % Ni

______

100.00 %

Empirical Formula:

Fe⁰⁺_2.25Ni_0.75Si

Environment:

Iron meteorites.

IMA Status:

Approved IMA 1982

Locality:

North Haig ureilite meteorite. Kurama ridge, Uzbekistan. Link to MinDat.org Location Data.

Name Origin:

Named for Hans E. Suess (1909-1957), U.S. Newspaper ppublisher and researcher on iron meteorites.

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Suessite Crystallography

Cell Dimensions:

a = 2.841, Z = 0.5; V = 22.93 Den(Calc)= 7.16

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): 2.005(1), 1.16(0.3), 1.41(0.1),

Physical Properties of Suessite

Cleavage:

None

Color:

Gray white.

Density:

7.08

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Luster:

Metallic

Magnetism:

Magnetic

Optical Properties of Suessite

Optical Data:

Isotropic.

RL Color:

Cream white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Suessite in Air**
λ	R	∑ R(λ)
470 nm	48.50
546 nm	51.60
589 nm	53.50
650 nm	50.00

**Calculated Relative Intensity Colors of Suessite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R

Calculated Properties of Suessite

Electron Density:

r_electron=6.77 gm/cc
note: r_Suessite=7.16 gm/cc.

Fermion Index

Fermion Index = 0.02261
Boson Index = 0.97739

Photoelectric:

PE_Suessite= 29.02 barns/electron
U=PE_Suessite x r_electron= 196.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Suessite is Not Radioactive

Suessite Classification

Dana Class:

1.1.23.1 (1)Native Elements

(1.1)with metallic elements other than the platinum group

(1.1.23)Dana Group

1.1.23.1 Suessite (Fe,Ni)3Si I m3m 4/m 3 2/m

1.1.23.2 Gupeiite Fe3Si F m3m 4/m 3 2/m

1.1.23.3 Xifengite Fe5Si3 P 6₃/mcm 6/m 2/m 2/m

1.1.23.4 Hapkeite! Fe2Si P m3m 4/m 3 2/m

Strunz Class:

I/A.12-20 I - Elements

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

I/A.12 - Perryite-Ferdisilicite series

I/A.12-10 Perryite (Ni,Fe)8(Si,P)3 R 3c 3m

I/A.12-20 Suessite (Fe,Ni)3Si I m3m 4/m 3 2/m

I/A.12-30 Gupeiite Fe3Si F m3m 4/m 3 2/m

I/A.12-35 Hapkeite! Fe2Si P m3m 4/m 3 2/m

I/A.12-40 Xifengite Fe5Si3 P 6₃/mcm 6/m 2/m 2/m

I/A.12-50 Fersilicite* FeSi P 2₁3 2 3

I/A.12-60 Ferdisilicite* FeSi2 P 4/mmm 4/m 2/m 2/m

Other Suessite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

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

Suessite

(Fe,Ni)3Si
Dana No: 1.1.23.1 Strunz No: I/A.12-20
Locality:

Notes: