Gupeiite Mineral Data

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.

Name Pronunciation:

Gupeiite

Gupeiite Image

Images:

Gupeiite

Comments: BSE image of a gupeiite (1) nodule surrounded by TiO2 (2).
Location: Turishkino, Leningrad District, Russia. Scale: See Image.
© Diederik Visser

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

Diaphaneity:

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:

Bulk Density (Electron Density)=6.71 gm/cc
note: Specific Gravity of Gupeiite =7.13 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Gupeiite= 26.82 barns/electron
U=PE_Gupeiite x rElectron Density= 179.86 barns/cc.

Radioactivity:

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

Gupeiite Classification

Dana Class:

01.01.23.02 (01)Native Elements

(01.01)with metallic elements other than the platinum group

(01.01.23)Suessite Group silicides

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

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

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

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

01.01.23.05 Luobusaite! Fe0.83Si2 C mca 2/m 2/m 2/m

01.01.23.06 Mavlyanovite! Mn5Si3 P 6₃/mcm 6/m 2/m 2/m

01.01.23.07 Brownleeite! MnSi P 2₁3 2 3

Strunz Class:

01.BB.30 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)

01.B - Metallic Carbides, Silicides, Nitrides and Phosphides

01.BB -Silicides

01.BB.30 Gupeiite Fe3Si F m3m 4/m 3 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Gupeiite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Gupeiite

Fe3Si
Dana No: 01.01.23.02 Strunz No: 01.BB.30
Locality:

Notes: