Carrollite Mineral Data

Carrollite Mineral Data +

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General Carrollite Information

Chemical Formula:

Cu(Co,Ni)2S4

Composition:

Molecular Weight = 309.55 gm

Cobalt 28.56 % Co

Copper 20.53 % Cu

Nickel 9.48 % Ni

Sulfur 41.43 % S

______

100.00 %

Empirical Formula:

CuCo_1.5Ni_0.5S₄

Environment:

In hydrothermal vein deposits.

IMA Status:

Valid Species (Pre-IMA) 1852

Locality:

In the USA, in the Patapsco mine, Finksburg, and the Mineral Hill mine, Sykesville, Carroll Co., Maryland. Link to MinDat.org Location Data.

Name Origin:

For its occurrence in Carroll Co., Maryland, USA.

Synonym:

ICSD 31107

PDF 42-1450

Carrollite Image

Images:

Carrollite

Comments: Carrollite crystal with minor attached matrix.
Location: Komoto-Frond in the Democratic Republic of the Congo. Scale: 1.2 cm.
© John Veevaert

Carrollite Crystallography

Cell Dimensions:

a = 9.477, Z = 8; V = 851.16 Den(Calc)= 4.83

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.86(1), 1.674(0.8), 1.825(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Williamson D P , Grimes N W , Journal of Physics D: Applied Physics , 7 (1974) p.1-6, An X-ray diffraction investigation of sulphide spinels

View Additional jPOWD Structure files for Carrollite
[1] [2]

Physical Properties of Carrollite

Cleavage:

[001] Indistinct

Color:

Gray, Gray, Copper red, Light gray, Steel.

Density:

4.5 - 4.8, Average = 4.65

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

4.5-5.5 - Near Apatite

Luster:

Metallic

Optical Properties of Carrollite

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Carrollite in Air**
λ	R	∑ R(λ)
400 nm	40.50
420 nm	40.60
440 nm	40.70
460 nm	40.70
480 nm	40.80
500 nm	40.90
520 nm	41.20
540 nm	41.80
560 nm	41.80
580 nm	41.90
600 nm	42.10
620 nm	42.70
640 nm	43.30
660 nm	43.90
680 nm	44.60
700 nm	45.00

**Calculated Relative Intensity Colors of Carrollite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R

Calculated Properties of Carrollite

Electron Density:

r_electron=4.60 gm/cc
note: r_Carrollite=4.83 gm/cc.

Fermion Index

Fermion Index = 0.00417
Boson Index = 0.99583

Photoelectric:

PE_Carrollite= 24.99 barns/electron
U=PE_Carrollite x r_electron= 115.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Carrollite is Not Radioactive

Carrollite Classification

Dana Class:

2.10.1.2 (2)Sulfides - Including Selenides and Tellurides

(2.10)where Am Bn Xp, with (m+n):p=3:4

(2.10.1)Linnaeite Group (Isometric: Fd3m)

2.10.1.1 Linnaeite CoCo2S4 F d3m 4/m 3 2/m

2.10.1.2 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m

2.10.1.3 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m

2.10.1.4 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m

2.10.1.5 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m

2.10.1.6 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m

2.10.1.7 Polydymite NiNi2S4 F d3m 4/m 3 2/m

2.10.1.8 Violarite FeNi2S4 F d3m 4/m 3 2/m

2.10.1.9 Trustedtite Ni3Se4 F d3m 4/m 3 2/m

2.10.1.10 Greigite FeFe2S4 F d3m 4/m 3 2/m

2.10.1.11 Daubreelite FeCr2S4 F d3m 4/m 3 2/m

2.10.1.12 Indite FeIn2S4 F d3m 4/m 3 2/m

2.10.1.13 Kalininite ZnCr2S4 F d3m 4/m 3 2/m

2.10.1.14 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m

2.10.1.15 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m

2.10.1.16 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m

2.10.1.17 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m

2.10.1.18 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m

2.10.1.19 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m

Strunz Class:

II/D.01-40 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.01 - Linneite group and related compounds

II/D.01-10 Greigite FeFe2S4 F d3m 4/m 3 2/m

II/D.01-20 Linnaeite CoCo2S4 F d3m 4/m 3 2/m

II/D.01-30 Polydymite NiNi2S4 F d3m 4/m 3 2/m

II/D.01-40 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m

II/D.01-50 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m

II/D.01-60 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m

II/D.01-70 Violarite FeNi2S4 F d3m 4/m 3 2/m

II/D.01-80 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m

II/D.01-90 Indite FeIn2S4 F d3m 4/m 3 2/m

II/D.01-95 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m

II/D.01-100 Daubreelite FeCr2S4 F d3m 4/m 3 2/m

II/D.01-110 Kalininite ZnCr2S4 F d3m 4/m 3 2/m

II/D.01-120 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m

II/D.01-130 Trustedtite Ni3Se4 F d3m 4/m 3 2/m

II/D.01-140 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m

Other Carrollite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AmMin)

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Print or Cut-and-Paste your Carrollite Specimen Label here :

Carrollite

Cu(Co,Ni)2S4
Dana No: 2.10.1.2 Strunz No: II/D.01-40
Locality:

Notes: