Stilleite Mineral Data

General Stilleite Information

Chemical Formula:

ZnSe

Composition:

Molecular Weight = 144.35 gm

Zinc 45.30 % Zn

Selenium 54.70 % Se

______

100.00 %

Empirical Formula:

ZnSe

Environment:

Included in linnaeite and intermixed with other selenides.

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

Kasolo (Shinkolobwe), Katanga (Shaba), Congo (Zaire). Link to MinDat.org Location Data.

Name Origin:

Named for Hans Stille (1876-1966), distinguished German geologist.

Name Pronunciation:

Stilleite + Pronunciation

Synonym:

ICSD 67791

PDF 37-1463

Stilleite Crystallography

Cell Dimensions:

a = 5.67, Z = 4; V = 182.28 Den(Calc)= 5.26

Crystal System:

Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: F43m

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

By Intensity(I/I_o): 3.273(1), 2.003(0.7), 1.707(0.44),

Physical Properties of Stilleite

Color:

Gray.

Density:

5.42

Diaphaneity:

Translucent to Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Stilleite

Optical Data:

Isotropic, n=2.5.

RL Color:

Resembles tetrahedrite without the olive-brown or greenish blue hues.

Calculated Properties of Stilleite

Electron Density:

Bulk Density (Electron Density)=4.66 gm/cc
note: Specific Gravity of Stilleite =5.26 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Stilleite= 67.66 barns/electron
U=PE_Stilleite x rElectron Density= 315.57 barns/cc.

Radioactivity:

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

Stilleite Classification

Dana Class:

02.08.02.02 (02)Sulfides - Including Selenides and Tellurides

(02.08)where Am Bn Xp, with (m+n):p=1:1

(02.08.02)Sphalerite Group (Isometric: F4-3m)

02.08.02.01 Sphalerite (Zn,Fe)S F43m 4 3m

02.08.02.02 Stilleite ZnSe F43m 4 3m

02.08.02.03 Metacinnabar HgS F43m 4 3m

02.08.02.04 Tiemannite HgSe F43m 4 3m

02.08.02.05 Coloradoite HgTe F43m 4 3m

02.08.02.06 Hawleyite CdS F43m 4 3m

02.08.02.07 Rudashevskyite! (Fe,Zn)S F43m 4 3m

Strunz Class:

02.CB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CB -With Zn, Fe, Cu, Ag, Au, etc

02.CB.05a Hawleyite CdS F43m 4 3m

02.CB.05a Coloradoite HgTe F43m 4 3m

02.CB.05a Metacinnabar HgS F43m 4 3m

02.CB.05a Sphalerite (Zn,Fe)S F43m 4 3m

02.CB.05a Tiemannite HgSe F43m 4 3m

02.CB.05a Stilleite ZnSe F43m 4 3m

02.CB.05a Rudashevskyite! (Fe,Zn)S F43m 4 3m

Other Stilleite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Stilleite :
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
15 - WWW-MINCRYST

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

Stilleite

ZnSe
Dana No: 02.08.02.02 Strunz No: 02.CB.05a
Locality:

Notes:

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