Gupeiite Mineral Data

Gupeiite Mineral Data +

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General Gupeiite Information

Chemical Formula:

Fe3Si

Composition:

Molecular Weight = 195.63 gm

Iron 85.64 % Fe

Silicon 14.36 % Si

______

100.00 %

Empirical Formula:

Fe⁰⁺₃Si

Environment:

Innermost in spheres, surrounded by nickel-iron minerals and their oxidation products, apparently of extraterrestrial origin, found in placers.

IMA Status:

Approved IMA 1984

Locality:

Yanshan area, Hebei Province, China Link to MinDat.org Location Data.

Name Origin:

Named for the eastern passageway, Gupeikou, of the Great Wall of China.

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Gupeiite Crystallography

Cell Dimensions:

a = 5.67, Z = 4; V = 182.28 Den(Calc)= 7.13

Crystal System:

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

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

By Intensity(I/I_o): 1.156(1), 2(0.9), 1.003(0.7),

Physical Properties of Gupeiite

Cleavage:

None

Color:

Steel gray, Black.

Density:

7.15

Diaphaniety:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

5 - Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Gupeiite

RL Color:

Grayish white with a yellow tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Gupeiite in Air**
λ	R	∑ R(λ)
402 nm	48.20
439 nm	48.40
480 nm	51.00
495 nm	51.20
546 nm	53.50
590 nm	53.40
624 nm	53.90
644 nm	54.00
657 nm	54.30

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

Calculated Properties of Gupeiite

Electron Density:

r_electron=6.71 gm/cc
note: r_Gupeiite=7.13 gm/cc.

Fermion Index

Fermion Index = 0.02486
Boson Index = 0.97514

Photoelectric:

PE_Gupeiite= 26.82 barns/electron
U=PE_Gupeiite x r_electron= 179.86 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gupeiite is Not Radioactive

Gupeiite Classification

Dana Class:

1.1.23.2 (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.12-30 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 Gupeiite Information

References:

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

See Also:

Links to other databases for Gupeiite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Gupeiite

Fe3Si
Dana No: 1.1.23.2 Strunz No: I/A.12-30
Locality:

Notes: