Ferdisilicite Mineral Data

Ferdisilicite Mineral Data +

General Ferdisilicite Information

Chemical Formula:

FeSi2

Composition:

Molecular Weight = 112.02 gm

Iron 49.86 % Fe

Silicon 50.14 % Si

______

100.00 %

Empirical Formula:

Fe⁰⁺Si₂

IMA Status:

Not Approved IMA

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 42562

PDF 35-822

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Ferdisilicite Crystallography

Axial Ratios:

a:c = 1:1.88847

Cell Dimensions:

a = 2.69, c = 5.08, Z = 1; V = 36.76 Den(Calc)= 5.06

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm

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

By Intensity(I/I_o): 1.089(1), 1.846(1), 2.371(0.9),

Physical Properties of Ferdisilicite

Cleavage:

None

Color:

Steel gray.

Density:

5.05

Diaphaniety:

Opaque

Fracture:

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

Hardness:

6.5 - Pyrite

Luster:

Metallic

Streak:

black

Calculated Properties of Ferdisilicite

Electron Density:

r_electron=4.88 gm/cc
note: r_{Ferdisilicite}=5.06 gm/cc.

Fermion Index

Fermion Index = 0.03398
Boson Index = 0.96602

Photoelectric:

PE_{Ferdisilicite}= 16.68 barns/electron
U=PE_{Ferdisilicite} x r_electron= 81.35 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferdisilicite is Not Radioactive

Ferdisilicite Classification

Dana Class:

2.0.0.0 (2)Sulfide Minerals

(2.0)Without Dana Classification Numbers

(Silicide)

Strunz Class:

I/A.12-60 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 Ferdisilicite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ferdisilicite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Ferdisilicite

FeSi2
Dana No: Unknown Strunz No: I/A.12-60
Locality:

Notes: