Fletcherite Mineral Data

Advertisment

WE BUY COLLECTIONS & SINGLE IMPORTANT SPECIMENS

General Fletcherite Information

Chemical Formula:

Cu(Ni,Co)2S4

Composition:

Molecular Weight = 309.31 gm

Cobalt 9.53 % Co

Copper 20.54 % Cu

Nickel 28.46 % Ni

Sulfur 41.47 % S

______

100.00 %

Empirical Formula:

CuNi_1.5Co_0.5S₄

Environment:

Found disseminated in copper sulfides, in copper-rich pods replacing dolostone.

IMA Status:

Approved IMA 1977

Locality:

At the Fletcher mine, Reynolds Co., Missouri, USA. Link to MinDat.org Location Data.

Name Origin:

For the Fletcher mine, Reynolds Co., Missouri, USA.

Name Pronunciation:

Fletcherite + Pronunciation

Fletcherite Image

Images:

Fletcherite

Comments: Small black crystals of fletcherite in halite. Very unusual association, from a hydrothermal vein cutting a halite deposit.
Location: Bernburg, Saxony-Anhalt, Germany. Scale: Picture size 1.2 mm.
© Thomas Witzke

Fletcherite Crystallography

Cell Dimensions:

a = 9.52, Z = 8; V = 862.80 Den(Calc)= 4.76

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): 1.68(1), 1.83(0.6), 2.87(0.5),

Physical Properties of Fletcherite

Color:

Steel gray.

Diaphaneity:

Opaque

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Fletcherite

RL Color:

Creamy white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Fletcherite in Air**
λ	R	∑ R(λ)
420 nm	36.40
460 nm	40.90
500 nm	42.50
546 nm	43.40
589 nm	45.30
640 nm	43.80

**Calculated Relative Intensity Colors of Fletcherite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	230%
R

Calculated Properties of Fletcherite

Electron Density:

Bulk Density (Electron Density)=4.57 gm/cc
note: Specific Gravity of Fletcherite =4.76 gm/cc.

Fermion Index:

Fermion Index = 0.0063262273
Boson Index = 0.9936737727

Photoelectric:

PE_Fletcherite= 26.00 barns/electron
U=PE_Fletcherite x rElectron Density= 118.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fletcherite is Not Radioactive

Fletcherite Classification

Dana Class:

02.10.01.03 (02)Sulfides - Including Selenides and Tellurides

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

(02.10.01)Linnaeite Group (Isometric: Fd3m)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Strunz Class:

02.DA.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DA -M:S = 3:4

02.DA.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m

02.DA.05 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m

02.DA.05 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m

02.DA.05 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m

02.DA.05 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m

02.DA.05 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m

02.DA.05 Dayingite* CuCoPtS4 F m3m 4/m 3 2/m

02.DA.05 Daubreelite FeCr2S4 F d3m 4/m 3 2/m

02.DA.05 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m

02.DA.05 Greigite FeFe2S4 F d3m 4/m 3 2/m

02.DA.05 Indite FeIn2S4 F d3m 4/m 3 2/m

02.DA.05 Linnaeite CoCo2S4 F d3m 4/m 3 2/m

02.DA.05 Kalininite ZnCr2S4 F d3m 4/m 3 2/m

02.DA.05 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m

02.DA.05 Polydymite NiNi2S4 F d3m 4/m 3 2/m

02.DA.05 Violarite FeNi2S4 F d3m 4/m 3 2/m

02.DA.05 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m

02.DA.05 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m

02.DA.05 Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 F d3m 4/m 3 2/m

02.DA.05 Trustedtite Ni3Se4 F d3m 4/m 3 2/m

02.DA.05 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m

Other Fletcherite Information

References:

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

See Also:

Links to other databases for Fletcherite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Fletcherite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Fletcherite :

A Bijoux Google Search for Fletcherite
Dakota Matrix Minerals Google Search for Fletcherite
John Betts Fine Minerals Search for Fletcherite
McDougall Minerals Google Search for Fletcherite
Rock and Mineral Shows Google Search for Fletcherite
Weinrich Minerals, Inc. Google Search for Fletcherite

Ask about Fletcherite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Fletcherite

Cu(Ni,Co)2S4
Dana No: 02.10.01.03 Strunz No: 02.DA.05
Locality:

Notes: