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Greenockite

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Charles Murray Cathcart
Formula:
CdS
Colour:
Yellow to red.
Lustre:
Adamantine, Resinous
Hardness:
3 - 3½
Specific Gravity:
4.8 - 4.9
Crystal System:
Hexagonal
Member of:
Name:
Named in 1840 by Henry James Brooke and Arthur Connell for Lord Greenock - later Earl Charles Murray Cathcart, 2nd Earl Cathcart [December 21, 1783, Walton-on-the-Naze, Essex, England, UK - July 16, 1859, St Leonards-on-Sea, Hastings, England, UK]. Earl Charles Murray Cathcart was a general in the British army and served as Governor of the Province of Canada. He was also the author of two papers: one on igneous rocks in Edinburgh, Scotland and one on coal in southern Scotland.
Dimorph of:
Typically found as yellow to red hemimorphic pyramidal crystals and earthy coatings. Caution should be used in sight identifying yellow cadmium sulfide coatings as hawleyite (dimorph of greenockite) is not a very rare species and occurs in identical appearing coatings and identical environments; furthermore some of these coatings can be X-ray amorphous ("xanthochroite").


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Classification of GreenockiteHide

Approved, 'Grandfathered' (first described prior to 1959)
2.CB.45

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
Dana 7th ed.:
2.6.4.2
2.8.7.2

2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.4.7

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
4 : Sulphides etc. of Group II metals other than Hg (Mg, Ca, Zn, Cd)

Pronounciation of GreenockiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of GreenockiteHide

Adamantine, Resinous
Transparency:
Translucent
Colour:
Yellow to red.
Streak:
Orange-yellow to brick red.
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN25=98 kg/mm2 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct on {1122}, imperfect on {0001}.
Fracture:
Conchoidal
Density:
4.8 - 4.9 g/cm3 (Measured)    4.824 g/cm3 (Calculated)

Optical Data of GreenockiteHide

Type:
Uniaxial (-)
RI values:
nω = 2.529 nε = 2.506
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Weak
Comments:
Uniaxial + for wavelengths red to blue-green

Chemical Properties of GreenockiteHide

Formula:
CdS
Common Impurities:
Zn

Crystallography of GreenockiteHide

Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 4.136 Å, c = 6.713 Å
Ratio:
a:c = 1 : 1.623
Unit Cell V:
99.45 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals hemimorphic pyramidal. Earthy coatings (sphalerite)
Twinning:
Twin plane {1122} rare forming trillings.

Crystallographic forms of GreenockiteHide

Crystal Atlas:
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Greenockite - {100}, {00-1}, {00-1}, modified
3d models and HTML5 code kindly provided by www.smorf.nl.

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Transparency
Opaque | Translucent | Transparent

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X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.58(80)
3.37(60)
3.16(100)
2.45(30)
2.07(60)
1.90(40)
1.79(20)
1.76(50)

Type Occurrence of GreenockiteHide

Synonyms of GreenockiteHide

Other Language Names for GreenockiteHide

Catalan:Greenockita
German:Greenockit
Italian:Greenockite
Polish:Grenokit
Simplified Chinese:硫镉矿
Slovak:Greenockit
Spanish:Greenockita
Traditional Chinese:硫鎘礦

Varieties of GreenockiteHide

Zincian GreenockiteA zinc-bearing variety of greenockite.

Relationship of Greenockite to other SpeciesHide

Member of:
Other Members of this group:
Buseckite(Fe,Zn,Mn)SHex. 6mm : P63mc
CadmoseliteCdSeHex. 6mm : P63mc
RambergiteMnSHex. 6mm : P63mc
Wurtzite(Zn,Fe)SHex. 6mm : P63mc

Common AssociatesHide

PrehniteCa2Al2Si3O10(OH)2
SmithsoniteZnCO3
SphaleriteZnS
Zeolite GroupA group name for a large number of framework alumosilicates (and, rarely, beryllosilicates, zincosilicates, ...
Associated Minerals Based on Photo Data:
Sphalerite52 photos of Greenockite associated with Sphalerite on mindat.org.
Smithsonite21 photos of Greenockite associated with Smithsonite on mindat.org.
Prehnite21 photos of Greenockite associated with Prehnite on mindat.org.
Fluorite19 photos of Greenockite associated with Fluorite on mindat.org.
Galena16 photos of Greenockite associated with Galena on mindat.org.
Calcite15 photos of Greenockite associated with Calcite on mindat.org.
Pyrite14 photos of Greenockite associated with Pyrite on mindat.org.
Quartz13 photos of Greenockite associated with Quartz on mindat.org.
Hemimorphite12 photos of Greenockite associated with Hemimorphite on mindat.org.
Gypsum8 photos of Greenockite associated with Gypsum on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.CB.AgmantiniteAg2MnSnS4Orth.
2.CB.05aColoradoiteHgTeIso. m3m (4/m 3 2/m)
2.CB.05aHawleyiteCdSIso. 4 3m : F4 3m
2.CB.05aMetacinnabarHgSIso. 4 3m : F4 3m
2.CB.05cPolhemusite(Zn,Hg)STet.
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4 Iso.
2.CB.05aSphaleriteZnSIso. 4 3m : F4 3m
2.CB.05aStilleiteZnSe
2.CB.05aTiemanniteHgSe
2.CB.05UM1998-15-S:CuFeZnCu2Fe3Zn5S10
2.CB.05aRudashevskyite(Fe,Zn)SIso. 4 3m : F4 3m
2.CB.10aChalcopyriteCuFeS2Tet. 4 2m : I4 2d
2.CB.10aEskeborniteCuFeSe2Tet.
2.CB.10aGalliteCuGaS2Tet. 4 2m : I4 2d
2.CB.10bHaycockiteCu4Fe5S8Orth. 2 2 2
2.CB.10aLenaiteAgFeS2Tet. 4 2m : I4 2d
2.CB.10bMooihoekiteCu9Fe9S16Tet.
2.CB.10bPutoraniteCu1.1Fe1.2S2Iso.
2.CB.10aRoquesiteCuInS2Tet. 4 2m : I4 2d
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m
2.CB.10aLaforêtiteAgInS2Tet. 4 2m : I4 2d
2.CB.15aČernýiteCu2(Cd,Zn,Fe)SnS4Tet. 4 2m : I4 2m
2.CB.15aFerrokesteriteCu2(Fe,Zn)SnS4Tet. 4 : I4
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4Tet. 4 2m : I4 2m
2.CB.15aIdaiteCu5FeS6Hex.
2.CB.15aKesterite Cu2ZnSnS4Tet. 4 : I4
2.CB.15aKuramiteCu3SnS4Tet.
2.CB.15bMohiteCu2SnS3Mon.
2.CB.15aPirquitasiteAg2ZnSnS4Tet. 4 : I4
2.CB.15aStanniteCu2FeSnS4Tet. 4 2m : I4 2m
2.CB.15cStannoiditeCu+6Cu2+2(Fe2+,Zn)3Sn2S12Orth.
2.CB.15aVelikiteCu2HgSnS4Tet.
2.CB.15cUM2006-11-S:CuFeGeZnCu8(Fe,Zn)3Ge2S12 (?)
2.CB.20ChatkaliteCu6FeSn2S8Tet. 4 2m : P4m2
2.CB.20MawsoniteCu6Fe2SnS8Tet. 4 2m : P4m2
2.CB.30ColusiteCu12VAs3S16Iso. 4 3m : P4 3n
2.CB.30GermaniteCu13Fe2Ge2S16Iso. 4 3m : P4 3n
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32Iso.
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32Iso.
2.CB.30StibiocolusiteCu13V(Sb,Sn,As)3S16Iso.
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32Iso.
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32
2.CB.35aHemusiteCu6SnMoS8Iso.
2.CB.35aKiddcreekiteCu6SnWS8Iso. 4 3m : F4 3m
2.CB.35aPolkovicite(Fe,Pb)3(Ge,Fe)1-xS4Iso.
2.CB.35aRenierite(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16Tet. 4 2m : P4 2c
2.CB.35aVincienniteCu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16Tet.
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4Iso.
2.CB.35bCatamarcaiteCu6GeWS8Hex. 6mm : P63mc
2.CB.40LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
2.CB.45CadmoseliteCdSeHex. 6mm : P63mc
2.CB.45Wurtzite(Zn,Fe)SHex. 6mm : P63mc
2.CB.45RambergiteMnSHex. 6mm : P63mc
2.CB.45Buseckite(Fe,Zn,Mn)SHex. 6mm : P63mc
2.CB.55aCubaniteCuFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.55bIsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
2.CB.60PicotpauliteTlFe2S3Orth. mmm (2/m 2/m 2/m) : Cmcm
2.CB.60RaguiniteTlFeS2Orth.
2.CB.65ArgentopyriteAgFe2S3Mon. 2/m
2.CB.65SternbergiteAgFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.70SulvaniteCu3VS4Iso.
2.CB.75VulcaniteCuTeOrth.
2.CB.80EmpressiteAgTeOrth. mmm (2/m 2/m 2/m)
2.CB.85MuthmanniteAuAgTe2Mon. 2/m : P2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

2.8.7.1Wurtzite(Zn,Fe)SHex. 6mm : P63mc
2.8.7.3CadmoseliteCdSeHex. 6mm : P63mc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.4.1Niningerite(Mg,Fe2+,Mn2+)SIso.
3.4.2Oldhamite(Ca,Mg)SIso. m3m (4/m 3 2/m) : Fm3m
3.4.3MátraiteZnSTrig.
3.4.4SphaleriteZnSIso. 4 3m : F4 3m
3.4.5Wurtzite(Zn,Fe)SHex. 6mm : P63mc
3.4.6StilleiteZnSe
3.4.8HawleyiteCdSIso. 4 3m : F4 3m
3.4.9CadmoseliteCdSeHex. 6mm : P63mc

Other InformationHide

Health Risks:
Contains cadmium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

Greenockite in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

References for GreenockiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Brooke, J. & Connell, A. (1840) Der Greenockit, ein neues Mineral, Annalen der Physik und Chemie, 127, 274-275.
Breithaupt, A. (1840) Greenockit, ein neues Mineral, Annalen der Physik und Chemie, 127, 507-510.
Palache, Charles, Harry Berman & Clifford Frondel (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 228-230.
American Mineralogist (1961) 46: 1382.
Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (1997) Dana's New Mineralogy: The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 73.
Deore, S. and Navrotsky, A. (2006) Oxide melt solution calorimetry of sulfides: Enthalpy of formation of sphalerite, galena, greenockite, and hawleyite. American Mineralogist: 91: 400-403.

Internet Links for GreenockiteHide

Localities for GreenockiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListShow

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