Mindat Logo

Mackinawite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
(Fe,Ni)
 
9
S
 
8
Also given as (Fe,Ni)1+xS (x = 0 to 0.11).
System:TetragonalColour:Bronze, White Gray
Hardness:
Name:Named after the discovery locality.


May be confused with valleriite.

Classification of Mackinawite

IMA status:Approved
Strunz 8th edition ID:2/B.17-10
Nickel-Strunz 10th (pending) edition ID:2.CC.25

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
Dana 7th edition ID:2.7.2.1
Dana 8th edition ID:2.7.2.1

2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8
Hey's CIM Ref.:3.9.6

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
9 : Sulphides etc. of Fe
mindat.org URL:http://www.mindat.org/min-2512.html
Please feel free to link to this page.

Type Occurrence of Mackinawite

Type Locality:Mackinaw Mine (Weden Creek Mine), Monte Cristo, Monte Cristo District, Snohomish Co., Washington, USA
Year of Discovery:1962

Physical Properties of Mackinawite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Bronze, White Gray
Streak:Black
Hardness (Mohs):
Cleavage:Perfect
Perfect on the {001}
Density (calculated):4.17 g/cm3

Crystallography of Mackinawite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:P4/nmm
Cell Parameters:a = 3.67Å, c = 5.03Å
Ratio:a:c = 1 : 1.371
Unit Cell Volume:V 68 ų
Z:2

Chemical Properties of Mackinawite

Formula:
(Fe,Ni)
 
9
S
 
8


Also given as (Fe,Ni)1+xS (x = 0 to 0.11).
Simplified for copy/paste:(Fe,Ni)9S8
Essential elements:Fe, S
All elements listed in formula:Fe, Ni, S
Common Impurities:Co,Cu,Ni

Relationship of Mackinawite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.CC.UM2007-26-S:CuFeIrNiPtRh
(Ir,Cu,Ni,Pt,Rh,Fe)
 
9
S
 
11
2.CC.05Achavalite
(Fe,Cu)Se
2.CC.05Breithauptite
NiSb
2.CC.05Freboldite
CoSe
2.CC.05Kotulskite
Pd(Te,Bi)
2.CC.05Langisite
(Co,Ni)As
2.CC.05Nickeline
NiAs
2.CC.05Sederholmite
beta-NiSe
2.CC.05Sobolevskite
Pd(Bi,Te)
2.CC.05Stumpflite
Pt(Sb,Bi)
2.CC.05Sudburyite
(Pd,Ni)Sb
2.CC.05Jaipurite
CoS
2.CC.05Zlatogorite
NiCuSb
 
2
2.CC.10Pyrrhotite
Fe
 
1-x
S (x = 0 to 0.17)
2.CC.10Smythite
(Fe,Ni)
 
3+x
S
 
4
(x=0-0.3)
2.CC.10Troilite
FeS
2.CC.15Cherepanovite
RhAs
2.CC.15Modderite
(Co,Fe)As
2.CC.15Ruthenarsenite
(Ru,Ni)As
2.CC.15Westerveldite
(Fe,Ni,Co)As
2.CC.20Millerite
NiS
2.CC.20Mäkinenite
γ-NiSe
2.CC.20UM1990-38-S:CuFeIrNiPtRh
(Ir,Pt,Ni,Fe)S
2.CC.30Hexatestibiopanickelite
(Pd,Ni)(Sb,Te)
2.CC.30Vavřínite
Ni
 
2
SbTe
 
2
2.CC.35aBraggite
(Pt,Pd,Ni)S
2.CC.35bCooperite
PtS
2.CC.35aVysotskite
(Pd,Ni)S
Related Minerals - Hey's Index Grouping:

- +
3.9.1Pyrrhotite
Fe
 
1-x
S (x = 0 to 0.17)
3.9.3Pyrite
FeS
 
2
3.9.4Marcasite
FeS
 
2
3.9.5Greigite
Fe
2+
 
Fe
3+
2
S
 
4
3.9.7Smythite
(Fe,Ni)
 
3+x
S
 
4
(x=0-0.3)
3.9.8Achavalite
(Fe,Cu)Se
3.9.9Ferroselite
FeSe
 
2
3.9.10Frohbergite
FeTe
 
2
3.9.11Löllingite
FeAs
 
2
3.9.12Arsenopyrite
FeAsS
3.9.13Gudmundite
FeSbS

Other Names for Mackinawite

Synonyms:
Kansite (of Meyer et al.)
Other Languages:
German:Mackinawit
Russian:Макинавит
Simplified Chinese:四方硫铁镍矿
四方硫铁矿
马基诺矿
Spanish:Mackinawita

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 Mackinawite

Reference List:

- +
American Mineralogist (1963): 48: 215.

Kouvo, Olavi, Vuorelainen, Yrjo, and Long, J.V.P. (1963): A tetragonal iron sulfide. American Mineralogist 48, 511-524.

Evans H T, Milton C, Chao E C T, Adler I, Mead C, Ingram B, Berner R A (1964): Valleriite and the new iron sulfide, mackinawite. U.S. Geological Survey Professional Paper, 475-D, 64-69.

Chemie der Erde (1981): 40: 237.

Krupp, R. E. (1994): Phase relations and phase transformations between the low-temperature iron sulfides mackinawite, greigite, and smythite. European Journal of Mineralogy, 6, 265-278.

American Mineralogist (1995): 80: 188.

Lennie A R, Redfern S A T, Schofield P F, Vaughan D J (1995): Synthesis and Rietveld crystal structure refinement of mackinawite, tetragonal FeS. Mineralogical Magazine, 59, 677-683.

Wolthers, M., Van Der Gaast, S.J., and Rickard, D. (2003) The structure of disordered mackinawite. American Mineralogist 88, 2007-2015.

Wolthers, M., Charlet, L., Van Der Linde, P.R., Rickard, D., and Vamn Der Weijden, C.H. (2005) Surface chemistry of disordered mackinawite (FeS). Geochemica et Cosmochimica Acta: 69: 3469-3481.

Internet Links for Mackinawite

Search Engines:
  • Look for Mackinawite on Google
  • Look for Mackinawite images on Google
  • External Links:
  • Look for Mackinawite on Webmineral
  • Look for Mackinawite on Athena Mineralogy
  • Look for Mackinawite on Wikipedia
  • Look for Mackinawite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mackinawite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • High-end worldwide specimens & outstanding customer service
  • Buy fine minerals and gemstones from Pala International
  • The Arkenstone - Fine Minerals
  • rare and unusual minerals mainly crystallized
  • Fine and rare minerals from mintreasure.com
  • Buy from Dave Bunk Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy minerals from YourMineralCollection
  • Buy RARE Minerals from Rocks of Africa
  • Buy from David K Joyce minerals
  • Fabre Minerals - search for Mackinawite specimens
  • Find Mackinawite on www.crystalclassics.co.uk
  • Localities for Mackinawite

    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.
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: October 24, 2014 07:45:32
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds