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Djurleite

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Formula:
Cu31S16
"Extended" formula varies from Cu+60Cu2+2S32 to Cu+62Cu2+2S32 (Goble, 1985).
System:
Monoclinic
Colour:
Black, gray in reflected ...
Lustre:
Metallic
Hardness:
2½ - 3
Name:
Named in 1962 by Eugene Holloway Roseboom, Jr. in honor of Dr. Seved Djurle [August 18, 1928 Sweden – October 4, 2000 Sweden], professor of chemistry at University of Uppsala, Sweden who first synthesized the synthetic equivalent before the mineral was discovered. {Note: Seved Djurle's birth year is frequently given as 1918 as various websites merely copy numbers without verification.}
Chalcocite-Digenite Group.
A copper sulphide closely related to chalcocite and easily confused with the latter.
Identification requires XRD or other suitable methods.


Classification of Djurleite

Approved
2.BA.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au
2.4.7.2

2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
3.1.2

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

Physical Properties of Djurleite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Black, gray in reflected light
Hardness (Mohs):
2½ - 3
Hardness (Vickers):
VHN100=65 - 85 kg/mm2
Density:
5.749 g/cm3 (Calculated)

Optical Data of Djurleite

Type:
Anisotropic
Anisotropism:
Weak
Colour in reflected light:
Gray

Chemical Properties of Djurleite

Formula:
Cu31S16

"Extended" formula varies from Cu+60Cu2+2S32 to Cu+62Cu2+2S32 (Goble, 1985).
Elements listed in formula:
Common Impurities:
Ag,Fe

Crystallography of Djurleite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 26.897 Å, b = 15.745 Å, c = 13.565 Å
β = 90.13°
Ratio:
a:b:c = 1.708 : 1 : 0.862
Unit Cell Volume:
V 5,744.67 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Short, prismatic, thick tabular, massive compact.
Twinning:
Common on {110}
Comment:
Space group P21/n.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.386 (50)
3.282 (30)
3.192 (30)
2.387 (90)
1.964 (90)
1.957 (90)
1.871 (100)
Comments:
Similar to chalcocite.

Occurrences of Djurleite

Type Occurrence of Djurleite

Relationship of Djurleite to other Species

Structurally related to group(s):
2.BA.05ChalcociteCu2S
2.BA.05GeeriteCu8S5
2.BA.05RoxbyiteCu9S5
2.BA.10AniliteCu7S4
2.BA.10DigeniteCu9S5
2.BA.15BorniteCu5FeS4
2.BA.20BellidoiteCu2Se
2.BA.20BerzelianiteCu2Se
2.BA.25AthabascaiteCu5Se4
2.BA.25UmangiteCu3Se2
2.BA.30RickarditeCu7Te5
2.BA.30WeissiteCu2-xTe
2.BA.35AcanthiteAg2S
2.BA.40MckinstryiteAg5-xCu3+xS4
2.BA.40StromeyeriteAgCuS
2.BA.40dUM2003-13-S:AgAuCuAg6AuCu2S5
2.BA.45JalpaiteAg3CuS2
2.BA.45SelenojalpaiteAg3CuSe2
2.BA.50EucairiteAgCuSe
2.BA.55AguilariteAg4SeS
2.BA.55NaumanniteAg2Se
2.BA.60CervelleiteAg4TeS
2.BA.60HessiteAg2Te
2.BA.60ChenguodaiteAg9Fe3+Te2S4
2.BA.65Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40
2.BA.65StütziteAg5-xTe3, x = 0.24-0.36
2.BA.70ArgyroditeAg8GeS6
2.BA.70CanfielditeAg8SnS6
2.BA.70Putzite(Cu4.7Ag3.3)GeS6
2.BA.75FischesseriteAg3AuSe2
2.BA.75Penzhinite(Ag,Cu)4Au(S,Se)4
2.BA.75PetrovskaiteAuAg(S,Se)
2.BA.75PetziteAg3AuTe2
2.BA.75UytenbogaardtiteAg3AuS2
2.BA.80Bezsmertnovite(Au,Ag)4Cu(Te,Pb)
2.BA.80BilibinskitePbCu2Au3Te2
2.BA.80Bogdanovite(Au,Te,Pb)3(Cu,Fe)
3.1.1ChalcociteCu2S
3.1.3DigeniteCu9S5
3.1.4AniliteCu7S4
3.1.5RoxbyiteCu9S5
3.1.6SpionkopiteCu39S28
3.1.7GeeriteCu8S5
3.1.8CovelliteCuS
3.1.9BerzelianiteCu2Se
3.1.10BellidoiteCu2Se
3.1.11UmangiteCu3Se2
3.1.12YarrowiteCu9S8
3.1.13AthabascaiteCu5Se4
3.1.14KlockmanniteCuSe
3.1.15Krut'aiteCuSe2
3.1.16WeissiteCu2-xTe
3.1.17RickarditeCu7Te5
3.1.18VulcaniteCuTe
3.1.19BambollaiteCu(Se,Te)2
3.1.20LautiteCuAsS
3.1.21MgriiteCu3AsSe3
3.1.22CubaniteCuFe2S3
3.1.23BorniteCu5FeS4
3.1.24FukuchiliteCu3FeS8
3.1.25ChalcopyriteCuFeS2
3.1.26MooihoekiteCu9Fe9S16
3.1.27HaycockiteCu4Fe5S8
3.1.28IsocubaniteCuFe2S3
3.1.29IdaiteCu5FeS6
3.1.30NukundamiteCu3.4Fe0.6S4
3.1.31PutoraniteCu1.1Fe1.2S2
3.1.32Orickite2CuFeS2 · H2O
3.1.33EskeborniteCuFeSe2
3.1.34Chaméanite(Cu,Fe)4As(Se,S)4
3.1.35TalnakhiteCu9(Fe,Ni)8S16

Other Names for Djurleite

Name in Other Languages:
German:Djurleit
Simplified Chinese:久辉铜矿
Spanish:Djurleita
Traditional Chinese:久輝銅礦

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.
Industrial Uses:
Copper ore

References for Djurleite

Reference List:
Roseboom, E.H. (1962) Djurleite, Cu1.96S, a new mineral. American Mineralogist: 47: 1181-1184.

American Mineralogist: 48: 215.

Zeitschrift für Kristallographie: 150: 299-320.

Goble, R.J. (1985): The relationship between crystal structure, bonding and cell dimensions in the copper sulfides. Canadian Mineralogist, 23, 61-76.

Pósfai, M. & Buseck, P. R. (1994): Djurleite, digenite, and chalcocite: Intergrowths and transformations. American Mineralogist, 79, 308-315.

Internet Links for Djurleite

mindat.org URL:
https://www.mindat.org/min-1300.html
Please feel free to link to this page.
Specimens:
The following Djurleite specimens are currently listed for sale on minfind.com.

Localities for Djurleite

Mineral and/or Locality  
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