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Greenockite

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Charles Murray Cathcart
Formula:
CdS
System:
Hexagonal
Colour:
Yellow to red.
Hardness:
3 - 3½
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 author of two papers: one on igneous rocks in Edinburgh, Scotland and one on coal in the 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").

Classification of Greenockite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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)
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First Recorded Occurrence of Greenockite

Year of Discovery:
1840

Occurrences of Greenockite

Geological Setting:
An uncommon mineral of sulfide deposits.

Physical Properties of Greenockite

Adamantine, Resinous
Diaphaneity (Transparency):
Translucent
Colour:
Yellow to red.
Streak:
Orange-yellow to brick red.
Hardness (Mohs):
3 - 3½
Hardness (Vickers):
VHN25=98 kg/mm2
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)

Crystallography of Greenockite

Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Cell Parameters:
a = 4.136Å, c = 6.713Å
Ratio:
a:c = 1 : 1.623
Unit Cell Volume:
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 Greenockite

Crystal Atlas:
Image Loading
Click on an icon to view
Greenockite - {100}, {00-1}, {00-1}, modified
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray 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)

Optical Data of Greenockite

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 Greenockite

Formula:
CdS
Essential elements:
All elements listed in formula:
Common Impurities:
Zn

Relationship of Greenockite to other Species

Member of:
Other Members of Group:
Buseckite(Fe,Zn,Mn)S
CadmoseliteCdSe
RambergiteMnS
Wurtzite(Zn,Fe)S
2.CB.05aColoradoiteHgTe
2.CB.05aHawleyiteCdS
2.CB.05aMetacinnabarHgS
2.CB.05cPolhemusite(Zn,Hg)S
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4
2.CB.05aSphaleriteZnS
2.CB.05aStilleiteZnSe
2.CB.05aTiemanniteHgSe
2.CB.05UM1998-15-S:CuFeZnCu2Fe3Zn5S10
2.CB.05aRudashevskyite(Fe,Zn)S
2.CB.10aChalcopyriteCuFeS2
2.CB.10aEskeborniteCuFeSe2
2.CB.10aGalliteCuGaS2
2.CB.10bHaycockiteCu4Fe5S8
2.CB.10aLenaiteAgFeS2
2.CB.10bMooihoekiteCu9Fe9S16
2.CB.10bPutoraniteCu9(Fe,Ni)9S16
2.CB.10aRoquesiteCuInS2
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16
2.CB.10aLaforêtiteAgInS2
2.CB.15aČernýiteCu2(Cd,Zn,Fe)SnS4
2.CB.15aFerrokësteriteCu2(Fe,Zn)SnS4
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4
2.CB.15aIdaiteCu5FeS6
2.CB.15aKësteriteCu2(Zn,Fe)SnS4
2.CB.15aKuramiteCu3SnS4
2.CB.15bMohiteCu2SnS3
2.CB.15aPirquitasiteAg2ZnSnS4
2.CB.15aStanniteCu2(Fe,Zn)SnS4
2.CB.15cStannoiditeCu6+Cu22+(Fe2+,Zn)3Sn2S12
2.CB.15aVelikiteCu2HgSnS4
2.CB.15cUM2006-11-S:CuFeGeZnCu8(Fe,Zn)3Ge2S12 (?)
2.CB.20ChatkaliteCu6FeSn2S8
2.CB.20MawsoniteCu6Fe2SnS8
2.CB.30ColusiteCu26V2(As,Sn,Sb)6S32
2.CB.30GermaniteCu13Fe2Ge2S16
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32
2.CB.30StibiocolusiteCu13V4(Sb,Sn,As)3S16
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32
2.CB.35aHemusiteCu6SnMoS8
2.CB.35aKiddcreekiteCu6SnWS8
2.CB.35aPolkovicite(Fe,Pb)3(Ge,Fe)1-xS4
2.CB.35aRenierite(Cu,Zn)11(Ge,As)2Fe4S16
2.CB.35aVincienniteCu7+Cu32+Fe22+Fe23+Sn(As,Sb)S16
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4
2.CB.35bCatamarcaiteCu6GeWS8
2.CB.40LautiteCuAsS
2.CB.45CadmoseliteCdSe
2.CB.45Wurtzite(Zn,Fe)S
2.CB.45RambergiteMnS
2.CB.45Buseckite(Fe,Zn,Mn)S
2.CB.55aCubaniteCuFe2S3
2.CB.55bIsocubaniteCuFe2S3
2.CB.60PicotpauliteTlFe2S3
2.CB.60RaguiniteTlFeS2
2.CB.65ArgentopyriteAgFe2S3
2.CB.65SternbergiteAgFe2S3
2.CB.70SulvaniteCu3VS4
2.CB.75VulcaniteCuTe
2.CB.80EmpressiteAgTe
2.CB.85MuthmanniteAuAgTe2
3.4.1Niningerite(Mg,Fe2+,Mn2+)S
3.4.2Oldhamite(Ca,Mg)S
3.4.3MátraiteZnS
3.4.4SphaleriteZnS
3.4.5Wurtzite(Zn,Fe)S
3.4.6StilleiteZnSe
3.4.8HawleyiteCdS
3.4.9CadmoseliteCdSe

Other Names for Greenockite

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

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Greenockite

Reference List:
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 Greenockite

Specimens:
The following Greenockite specimens are currently listed for sale on minfind.com.

Localities for Greenockite

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.
Mineral and/or Locality  
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