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Wurtzite Mineral Data

General Wurtzite Information

Chemical Formula:

(Zn,Fe)S

Composition:

Molecular Weight = 96.50 gm

Zinc 60.98 % Zn

Iron 5.79 % Fe

Sulfur 33.23 % S

______

100.00 %

Empirical Formula:

Zn_0.9Fe²⁺_0.1S

Environment:

Of hydrothermal origin in veins with other sulfides.

IMA Status:

Valid Species (Pre-IMA) 1861

Locality:

Pr�bram, Stredocesky kraj, Czech Republic Link to MinDat.org Location Data.

Name Origin:

Named after the French chemist, Charles A. Wurtze (1817-1884).

Name Pronunciation:

Wurtzite

Synonym:

Radial Blende

Wurtzite Image

Images:

Wurtzite Barite

Comments: Compact, dark, metallic crystals of wurtzite intermixed with galena crystals and white barite blades.
Location: Huanzala, Huanuco Dept., Peru. Scale: 5 x 4 x 2.5 cm.
© Isaias Casanova / IC Minerals

Wurtzite Crystallography

Axial Ratios:

a:c = 1:1.63874

Cell Dimensions:

a = 3.82, c = 6.26, Z = 2; V = 79.11 Den(Calc)= 4.05

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

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

By Intensity(I/I_o): 3.31(1), 3.13(0.86), 2.93(0.84),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Xu Y N , Ching W Y , Physical Review B , 48 (1993) p.4335-4351, Electronic, optical, and structural properties of some wurtzite crystals, Note: 2H polytype

Physical Properties of Wurtzite

Cleavage:

{1010} Good, {0001} Good

Color:

Brownish black, Orange brown, Reddish brown, Black.

Density:

3.98 - 4.08, Average = 4.03

Diaphaneity:

Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Colloform - Forming from a gel or colloidal mass.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luminescence:

Fluorescent, Long UV=orange red.

Luster:

Adamantine - Resinous

Magnetism:

Nonmagnetic

Streak:

light brown

Optical Properties of Wurtzite

Dichroism (e):

none.

Dichroism (w):

none.

Optical Data:

Uniaxial (+), w=2.356, e=2.378, bire=0.0220.

RL Color:

Deep reddish brown to dark brown to brown-black; yellow to dark brown internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Wurtzite in Air**
λ	R	∑ R(λ)
400 nm	19.20
420 nm	18.70
440 nm	18.20
460 nm	17.80
480 nm	17.40
500 nm	17.10
520 nm	16.90
540 nm	16.60
560 nm	16.40
580 nm	16.30
600 nm	16.20
620 nm	16.10
640 nm	16.10
660 nm	16.10
680 nm	16.00
700 nm	15.80

**Calculated Relative Intensity Colors of Wurtzite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%
R

Calculated Properties of Wurtzite

Electron Density:

Bulk Density (Electron Density)=3.83 gm/cc
note: Specific Gravity of Wurtzite =4.05 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Wurtzite= 34.43 barns/electron
U=PE_Wurtzite x rElectron Density= 131.76 barns/cc.

Radioactivity:

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

Wurtzite Classification

Dana Class:

02.08.07.01 (02)Sulfides - Including Selenides and Tellurides

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

(02.08.07)Wurtzite Group (Hexagonal: P63mc)

02.08.07.01 Wurtzite (Zn,Fe)S P 6₃mc 6mm

02.08.07.02 Greenockite CdS P 6₃mc 6mm

02.08.07.03 Cadmoselite CdSe P 6₃mc 6mm

02.08.07.04 Rambergite! MnS P 6₃mc 6mm

Strunz Class:

02.CB.45 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.45 Cadmoselite CdSe P 6₃mc 6mm

02.CB.45 Greenockite CdS P 6₃mc 6mm

02.CB.45 Rambergite! MnS P 6₃mc 6mm

02.CB.45 Wurtzite (Zn,Fe)S P 6₃mc 6mm

Other Wurtzite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Wurtzite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineral and Gemstone Kingdom
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

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Ask about Wurtzite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Print or Cut-and-Paste your Wurtzite Specimen Label here :

Wurtzite

(Zn,Fe)S
Dana No: 02.08.07.01 Strunz No: 02.CB.45
Locality:

Notes: