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Gortdrumite

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Gortdrum Mine, Monard, Co. Tipperary, Ireland
© Dr Stephen Moreton

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Formula:
(Cu,Fe)
 
6
Hg
 
2
S
 
5
System:OrthorhombicColour:Blackish lead-gray
Hardness:3½ - 4
Name:For the type locality
This page provides mineralogical data about Gortdrumite.

Classification of Gortdrumite

IMA status:Approved
Strunz 8th edition ID:2/B.02-20
Nickel-Strunz 10th (pending) edition ID:2.BD.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
D : With Hg, Tl
Dana 8th edition ID:2.16.14.1

2 : SULFIDES
16 : Miscellaneous
Hey's CIM Ref.:3.5.9

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
5 : Sulphides etc. of Hg and Tl
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Type Occurrence of Gortdrumite

Type Locality:Gortdrum Mine, Monard, Co. Tipperary, Ireland
Place of Conservation of Type Material:British Museum of Natural History
Year of Discovery:1983
Geological Setting of type material:Sulfide veins cutting dolomites
Associated Minerals at type locality:
ChalcopyriteBorniteChalcociteCinnabarDolomite
Baryte

Physical Properties of Gortdrumite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Blackish lead-gray
Hardness (Mohs):3½ - 4
Hardness (Vickers):VHN10=186 - 230 kg/mm2
Density (calculated):6.80 g/cm3

Crystallography of Gortdrumite

Crystal System:Orthorhombic
Cell Parameters:a = 14.96Å, b = 7.90Å, c = 24.1Å
Ratio:a:b:c = 1.894 : 1 : 3.051
Unit Cell Volume:V 2,848.23 ų (Calculated from Unit Cell)
Z:12
Morphology:Anhedral grains to 200 microns
Twinning:Fine lamellar

Optical Data of Gortdrumite

Type:Anisotropic
Anisotropism:Strong - colors from gratish white with bluish tint to blue

Chemical Properties of Gortdrumite

Formula:
(Cu,Fe)
 
6
Hg
 
2
S
 
5
Essential elements:Cu, Hg, S
All elements listed in formula:Cu, Fe, Hg, S

Relationship of Gortdrumite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.BD.UM2004-33-S:AgCuHgSe
(Ag,Cu)
 
8
Hg
 
3
(S,Se)
 
7
2.BD.05Imiterite
Ag
 
2
HgS
 
2
2.BD.15Balkanite
Cu
 
9
Ag
 
5
HgS
 
8
2.BD.15Danielsite
(Cu,Ag)
 
14
HgS
 
8
2.BD.20Donharrisite
Ni
 
8
Hg
 
3
S
 
9
2.BD.25Carlinite
Tl
 
2
S
2.BD.30Bukovite
Tl
 
2
(Cu,Fe)
 
4
Se
 
4
2.BD.30Murunskite
K
 
2
(Cu,Fe)
 
4
S
 
4
2.BD.30Thalcusite
Tl
 
2
Cu
 
3
FeS
 
4
2.BD.35Rohaite
(Tl,Pb,K)
 
2
Cu
 
8.7
Sb
 
2
S
 
4
2.BD.40Chalcothallite
Tl
 
2
(Cu,Fe)
 
6
SbS
 
4
2.BD.45Sabatierite
Cu
 
6
TlSe
 
4
2.BD.50Crookesite
Cu
 
7
(Tl, Ag)Se
 
4
2.BD.55Brodtkorbite
Cu
 
2
HgSe
 
2
Related Minerals - Hey's Index Grouping:

- +
3.5.1Cinnabar
HgS
3.5.2Hypercinnabar
HgS
3.5.3Metacinnabar
HgS
3.5.4Imiterite
Ag
 
2
HgS
 
2
3.5.5Tiemannite
HgSe
3.5.6Balkanite
Cu
 
9
Ag
 
5
HgS
 
8
3.5.7Danielsite
(Cu,Ag)
 
14
HgS
 
8
3.5.8Coloradoite
HgTe
3.5.10Polhemusite
(Zn,Hg)S
3.5.11Carlinite
Tl
 
2
S
3.5.12Crookesite
Cu
 
7
(Tl, Ag)Se
 
4
3.5.13Sabatierite
Cu
 
6
TlSe
 
4
3.5.14Picotpaulite
TlFe
 
2
S
 
3
3.5.15Raguinite
TlFeS
 
2
3.5.16Thalcusite
Tl
 
2
Cu
 
3
FeS
 
4
3.5.17Bukovite
Tl
 
2
(Cu,Fe)
 
4
Se
 
4
3.5.18Gallite
CuGaS
 
2
3.5.19Roquesite
CuInS
 
2
3.5.20Indite
FeIn
 
2
S
 
4

Other Names for Gortdrumite

Synonyms:
IMA1979-039
Other Languages:
German:Gortdrumit
Spanish:Gortdrumita

Other Information

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

References for Gortdrumite

Reference List:

- +
American Mineralogist: 69: 407.

Internet Links for Gortdrumite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Gortdrumite details from Handbook of Mineralogy (PDF)
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    • Localities for Gortdrumite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Salzburg
      • Saalfelden
        • Leogang
          • Hütten
            • Schwarzleograben
              • Schwarzleo District
    		Leblhuber, P. (2000): Lagerstättenkundliche Untersuchungen im Grubenrevier Schwarzleo-Mitte, Leogang, Salzburg. Unpubl. Diploma Thesis, University of Salzburg, xx pp.
    Ireland
     
    • Co. Tipperary
      • Monard
    		Min.Mag.(1983) 47, 35-36
    USA
     
    • Nevada
      • Eureka Co.
        • Lynn District
    		NBMG Spec. Pub. 31 Minerals of Nevada
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