Mineralogy Database

Greenockite Mineral Data

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General Greenockite Information

Help on Chemical  Formula: Chemical Formula: CdS
Help on Composition: Composition: Molecular Weight = 144.48 gm
   Cadmium  77.81 %  Cd
   Sulfur   22.19 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: CdS
Help on Environment: Environment: Traprock cavities and ore veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1840
Help on Locality: Locality: Greenock, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Lord Greenock (Ch. M. Cathcart 1783-1859).
Help on Name Pronunciation: Name Pronunciation: Greenockite + Pronunciation Say GREENOCKITE
Help on Synonym: Synonym: ICSD 60629
  PDF 41-1049

Greenockite Image

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Comments: Brown, equant crystal of greenockite on prehnite.
Location: Summit, Union County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Greenockite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.63874
Help on Cell Dimensions: Cell Dimensions: a = 3.82, c = 6.26, Z = 2; V = 79.11 Den(Calc)= 6.06
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Pyramidal H-M Symbol (6mm) Space Group: P 63mc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.16(1), 3.58(0.75), 3.36(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 2 0 3) ( 1 0 4) ( 1 0 2) ( 1 0 2) ( 0 1 0) ( 0 0 1)

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Physical Properties of Greenockite

Help on Cleavage: Cleavage: {1120} Distinct, {0001} Imperfect
Help on Color: Color: Honey yellow, Citron yellow, Orange yellow.
Help on Density: Density: 3.98 - 5, Average = 4.49
Help on Diaphaneity: Diaphaneity: Opaque to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Colloform - Forming from a gel or colloidal mass.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine - Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: orange yellow

Optical Properties of Greenockite

Help on Dichroism (e): Dichroism (e): red or bluish green.
Help on Dichroism (w): Dichroism (w): blue green or blue.
Help on Optical Data: Optical Data: Uniaxial (+/-), a=2.506, b=2.529, bire=0.0230.
Help on RL Color: RL Color: Very light lemon yellow to red-browns and blood red.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Greenockite in Air
λ R  ∑ R(λ) 
 400 nm   21.10   
 420 nm   21.00 
 440 nm   21.90 
 460 nm   22.20 
 480 nm   21.80 
 500 nm   20.70 
 520 nm   20.00 
 540 nm   19.60 
 560 nm   19.10 
 580 nm   18.70 
 600 nm   18.50 
 620 nm   18.20 
 640 nm   18.00 
 660 nm   17.80 
 680 nm   17.70 
 700 nm   17.50 
Calculated Relative Intensity Colors of Greenockite in Air
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450% 480%

Calculated Properties of Greenockite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.37 gm/cc
note: Specific Gravity of Greenockite =6.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.19
Boson Index = 0.81
Help on Photoelectric: Photoelectric: PEGreenockite = 212.93 barns/electron
U=PEGreenockite x rElectron Density=1,143.19 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Greenockite is Not Radioactive

Greenockite Classification

Help on  Dana Class: Dana Class: (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) Wurtzite (Zn,Fe)S P 63mc 6mm Greenockite CdS P 63mc 6mm Cadmoselite CdSe P 63mc 6mm Rambergite! MnS P 63mc 6mm
Help on  Strunz Class: 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 Greenockite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Greenockite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - Franklin Minerals(Palache)
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 02.CB.45





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