登录注册
主页关于 MindatMindat手册Mindat的历史版权Who We Are联系我们于 Mindat.org刊登广告
捐赠给 MindatCorporate Sponsorship赞助板页已赞助的板页在 Mindat刊登 广告的广告商于 Mindat.org刊登广告
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe Elements书籍及杂志
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
搜索:
矿物名称:
地区产地名称:
关键字:
 
Mindat手册添加新照片Rate Photos产区编辑报告Coordinate Completion Report添加词汇表项目
Mining Companies统计会员列表Mineral Museums矿物展及活动The Mindat目录表设备设置
照片搜索Photo Galleries今天最新的照片昨天最新的照片用户照片相集过去每日精选照片相集Mineral Photography

Chalcocite

This page kindly sponsored by Mark Kucera
Hide all sections | Show all sections

About ChalcociteHide

Formula:
Cu2S
Colour:
Blue black, gray, black, black gray, or steel gray
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
5.5 - 5.8
Crystal System:
Monoclinic
Name:
Named chalcosine in 1832 by François Sulpice Beudant from Greek, "chalkos", copper. This mineral was known by a wide variety of names previously. In 1868, James D. Dana and George J. Brush renamed this material "chalcocite".
Chalcocite-Yarrowite Series.

A secondary mineral in or near the oxidized zone of copper sulfide deposits. Hexagonal above 105°C ('High-chalcocite').
Easily confused with djurleite.

Small amounts of the Cu2S phase may deposit from supersaturated volcanic gas, as shown in an experiment (Africano et al., 2002; 300-700oC deposition range for this particular experiment).


Classification of ChalcociteHide

Approved, 'Grandfathered' (first described prior to 1959)
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
2.4.7.1

2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
3.1.1

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

Pronounciation of ChalcociteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of ChalcociteHide

Metallic
Transparency:
Opaque
Colour:
Blue black, gray, black, black gray, or steel gray
Streak:
Blackish lead gray
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN100=84 - 87 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Indistinct on (110)
Fracture:
Conchoidal
Comment:
Somewhat sectile
Density:
5.5 - 5.8 g/cm3 (Measured)    5.8 g/cm3 (Calculated)

Optical Data of ChalcociteHide

Type:
Anisotropic
Anisotropism:
Weak

Chemical Properties of ChalcociteHide

Formula:
Cu2S
Common Impurities:
Fe

Crystallography of ChalcociteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 15.246(4) Å, b = 11.884(2) Å, c = 13.494(3) Å
β = 116.35(1)°
Ratio:
a:b:c = 1.283 : 1 : 1.135
Unit Cell V:
2,190.86 ų (Calculated from Unit Cell)
Twinning:
Common on {110} yielding pseudohexagonal stellate forms. Also on {032}, {112}.
Comment:
May be point group m and space group Pc; other monoclinic cell given: a = 11.82, b = 27.05, c = 13.43, β = 90°.

Crystallographic forms of ChalcociteHide

Crystal Atlas:
Image Loading
Click on an icon to view
Chalcocite no.48 - Goldschmidt (1913-1926)
Chalcocite - Penetration twin on {032}
Chalcocite - Multiple twin on {110}
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indices | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.276 Å(35)
2.7256 Å(35)
2.4074 Å(50)
2.4030 Å(70)
1.9746 Å(70)
1.8811 Å(70)
1.8800 Å(100)
Comments:
Similar to djurleite.

Synonyms of ChalcociteHide

Other Language Names for ChalcociteHide

Varieties of ChalcociteHide

Argentiferous ChalcociteA silver-bearing variety of chalcocite.
Probably a mixture.
DucktowniteBlackish chalcocite coating or enclosing crystals or grains of Pyrite.
Originally described from Ducktown mine, Ducktown, Ducktown District, Polk Co., Tennessee, USA.
Harrisite (of Dana)Pseudomorph of chalcocite after galena.
At the Osarizawa mine, Japan, djurleite pseudos after galena were also called "harrisite" (Alfredo Petrov).
Para-KupferglanzParamorphs of Chalcocite after High-Chalcocite

Relationship of Chalcocite to other SpeciesHide

Other Members of this group:
DigeniteCu9S5Trig. 3m (3 2/m) : R3m
DjurleiteCu31S16Mon. 2/m
RoxbyiteCu9S5Tric. 1 : P1
YarrowiteCu9S8Trig.
Structurally related to group(s):
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
111 photos of Chalcocite associated with CalciteCaCO3
98 photos of Chalcocite associated with QuartzSiO2
92 photos of Chalcocite associated with BorniteCu5FeS4
85 photos of Chalcocite associated with MalachiteCu2(CO3)(OH)2
79 photos of Chalcocite associated with ChalcopyriteCuFeS2
51 photos of Chalcocite associated with DjurleiteCu31S16
46 photos of Chalcocite associated with PyriteFeS2
31 photos of Chalcocite associated with ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
28 photos of Chalcocite associated with CovelliteCuS
18 photos of Chalcocite associated with SilverAg

Related Minerals - Nickel-Strunz GroupingHide

2.BA.AlburniteAg8GeTe2S4Iso.
2.BA.DzierżanowskiteCaCu2S2Trig. 3m (3 2/m) : P3m1
2.BA.05DjurleiteCu31S16Mon. 2/m
2.BA.05GeeriteCu8S5Trig. 3
2.BA.05RoxbyiteCu9S5Tric. 1 : P1
2.BA.10AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.10DigeniteCu9S5Trig. 3m (3 2/m) : R3m
2.BA.15BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
2.BA.20BellidoiteCu2SeTet. 4/m : P42/n
2.BA.20BerzelianiteCu2SeIso. m3m (4/m 3 2/m) : Fm3m
2.BA.25AthabascaiteCu5Se4Orth.
2.BA.25UmangiteCu3Se2Tet.
2.BA.30RickarditeCu7Te5Orth.
2.BA.30WeissiteCu2-xTeHex.
2.BA.35AcanthiteAg2SMon. 2/m : P21/m
2.BA.40MckinstryiteAg5-xCu3+xS4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.40StromeyeriteAgCuSOrth. mmm (2/m 2/m 2/m)
2.BA.40dUM2003-13-S:AgAuCuAg6AuCu2S5
2.BA.45JalpaiteAg3CuS2Tet.
2.BA.45SelenojalpaiteAg3CuSe2Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
2.BA.50EucairiteAgCuSeOrth.
2.BA.55AguilariteAg4SeSMon. 2/m
2.BA.55NaumanniteAg2SeOrth. 2 2 2 : P21 21 21
2.BA.60CervelleiteAg4TeSMon. 2/m
2.BA.60HessiteAg2TeMon. 2/m : P21/b
2.BA.60ChenguodaiteAg9Fe3+Te2S4Orth.
2.BA.65Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40 Iso. m3m (4/m 3 2/m) : Fd3c
2.BA.65StütziteAg5-xTe3, x = 0.24-0.36Hex. 6 : P6
2.BA.70ArgyroditeAg8GeS6Orth. mm2 : Pna21
2.BA.70CanfielditeAg8SnS6Orth. mm2
2.BA.70Putzite(Cu4.7Ag3.3)GeS6Iso. 4 3m : F4 3m
2.BA.75FischesseriteAg3AuSe2Iso. 4 3 2 : I41 3 2
2.BA.75Penzhinite(Ag,Cu)4Au(S,Se)4Hex.
2.BA.75PetrovskaiteAuAgSMon.
2.BA.75PetziteAg3AuTe2Iso. 4 3 2 : I41 3 2
2.BA.75UytenbogaardtiteAg3AuS2Trig. 3m (3 2/m) : R3c
2.BA.80Bezsmertnovite(Au,Ag)4Cu(Te,Pb)Orth.
2.BA.80BilibinskitePbCu2Au3Te2Iso.
2.BA.80Bogdanovite(Au,Te,Pb)3(Cu,Fe)Iso.

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

2.4.7.2DjurleiteCu31S16Mon. 2/m
2.4.7.3DigeniteCu9S5Trig. 3m (3 2/m) : R3m
2.4.7.4RoxbyiteCu9S5Tric. 1 : P1
2.4.7.5AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
2.4.7.7SpionkopiteCu39S28Trig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.1.2DjurleiteCu31S16Mon. 2/m
3.1.3DigeniteCu9S5Trig. 3m (3 2/m) : R3m
3.1.4AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
3.1.5RoxbyiteCu9S5Tric. 1 : P1
3.1.6SpionkopiteCu39S28Trig.
3.1.7GeeriteCu8S5Trig. 3
3.1.8CovelliteCuSHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.1.9BerzelianiteCu2SeIso. m3m (4/m 3 2/m) : Fm3m
3.1.10BellidoiteCu2SeTet. 4/m : P42/n
3.1.11UmangiteCu3Se2Tet.
3.1.12YarrowiteCu9S8Trig.
3.1.13AthabascaiteCu5Se4Orth.
3.1.14KlockmanniteCuSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.1.15Krut'aiteCuSe2Iso. m3 (2/m 3) : Pa3
3.1.16WeissiteCu2-xTeHex.
3.1.17RickarditeCu7Te5Orth.
3.1.18VulcaniteCuTeOrth.
3.1.19BambollaiteCu(Se,Te)2Tet.
3.1.20LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
3.1.21MgriiteCu3AsSe3
3.1.22CubaniteCuFe2S3Orth. mmm (2/m 2/m 2/m)
3.1.23BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
3.1.24FukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
3.1.25ChalcopyriteCuFeS2Tet. 4 2m : I4 2d
3.1.26MooihoekiteCu9Fe9S16Tet.
3.1.27HaycockiteCu4Fe5S8Orth. 2 2 2
3.1.28IsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
3.1.29IdaiteCu5FeS6Hex.
3.1.30NukundamiteCu3.33Fe0.66S4Trig. 3m (3 2/m) : P3m1
3.1.31PutoraniteCu1.1Fe1.2S2Iso.
3.1.32Orickite2CuFeS2 · H2OHex.
3.1.33EskeborniteCuFeSe2Tet.
3.1.34Chaméanite(Cu,Fe)4As(Se,S)4Iso.
3.1.35TalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m

Other InformationHide

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

Chalcocite in petrologyHide

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

References for ChalcociteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.: 187-190.
Zeitschrift für Kristallographie 150, 299-320.
Cook, W.R. (1972) Instability of chalcocite. Mineralogical Record 3, 15.
Pósfai, M. & Buseck, P. R. (1994) Djurleite, digenite, and chalcocite: Intergrowths and transformations. American Mineralogist, 79, 308-315.
Africano, F., Van Rompaey, G., Bernard, A., Le Guern, F. (2002) Deposition of trace elements from high temperature gases of Satsuma-Iwojima volcano. Earth Planets Space: 54: 275-286.

Internet Links for ChalcociteHide

Localities for ChalcociteHide

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

This section is currently hidden. Click the show button to view.