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Millerite

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Formula:
NiS
Colour:
Pale brass-yellow, with an iridescent tarnish, and greenish-grey.
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
5.3 - 5.5
Crystal System:
Trigonal
Name:
Named by Wilhelm Haidinger in 1845 in honor of the English mineralogist, Professor William Hallowes Miller [April 6, 1801, Velindre, Wales, UK - May 20, 1880, Cambridge, England, UK], University of Cambridge, who first studied the crystals.
Commonly found as radiating and jackstraw clusters of shiny metallic acicular crystals, pale brass-yellow with an iridescent tarnish.

Compare 'UM1989-25-S:FeNi' - a representative of the Fe1-xS-Ni1-xS (Mss) solid solution.


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Classification of MilleriteHide

Approved, 'Grandfathered' (first described prior to 1959)
2.CC.20

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 ed.:
2.8.16.1
2.8.16.1

2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.11.3

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

Pronounciation of MilleriteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of MilleriteHide

Metallic
Transparency:
Opaque
Colour:
Pale brass-yellow, with an iridescent tarnish, and greenish-grey.
Streak:
Greenish black.
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN20=179 kg/mm2 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {1011} and {0112}.
Fracture:
Irregular/Uneven
Density:
5.3 - 5.5 g/cm3 (Measured)    5.374 g/cm3 (Calculated)

Optical Data of MilleriteHide

Type:
Anisotropic
Anisotropism:
Strong
Pleochroism:
Weak
Comments:
Weak in air stronger in oil
Pale yellow-brown to bright yellow

Chemical Properties of MilleriteHide

Formula:
NiS
Common Impurities:
Fe,Co,Cu

Crystallography of MilleriteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 9.607 Å, c = 3.143 Å
Ratio:
a:c = 1 : 0.327
Unit Cell V:
251.22 ų (Calculated from Unit Cell)
Z:
9
Morphology:
Acicular crystals in radiating or jackstraw clusters; also massive.
Twinning:
None reported.

Crystallographic forms of MilleriteHide

Crystal Atlas:
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Millerite - prismatic {100}
3d models and HTML5 code kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.81(60)
2.95(40)
2.78(100)
2.51(70)
2.23(60)
1.86(90)
1.82(50)
1.74(40)

Type Occurrence of MilleriteHide

Synonyms of MilleriteHide

Other Language Names for MilleriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite150 photos of Millerite associated with Calcite on mindat.org.
Quartz91 photos of Millerite associated with Quartz on mindat.org.
Chalcopyrite85 photos of Millerite associated with Chalcopyrite on mindat.org.
Dolomite69 photos of Millerite associated with Dolomite on mindat.org.
Sphalerite50 photos of Millerite associated with Sphalerite on mindat.org.
Siderite36 photos of Millerite associated with Siderite on mindat.org.
Chalcedony32 photos of Millerite associated with Chalcedony on mindat.org.
Pyrite31 photos of Millerite associated with Pyrite on mindat.org.
Galena30 photos of Millerite associated with Galena on mindat.org.
Marcasite19 photos of Millerite associated with Marcasite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

2.CC.UM2007-26-S:CuFeIrNiPtRh(Ir,Cu,Ni,Pt,Rh,Fe)9S11
2.CC.05Achávalite(Fe,Cu)SeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05BreithauptiteNiSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05FrebolditeCoSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05KotulskitePd(Te,Bi)Hex.
2.CC.05Langisite(Co,Ni)AsHex. 6 : P63
2.CC.05NickelineNiAsHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
2.CC.05Sederholmitebeta-NiSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.05SobolevskitePd(Bi,Te)Hex.
2.CC.05StumpflitePt(Sb,Bi)Hex.
2.CC.05Sudburyite(Pd,Ni)SbHex.
2.CC.05JaipuriteCoSHex.
2.CC.05ZlatogoriteNiCuSb2Trig.
2.CC.10PyrrhotiteFe7S8Mon.
2.CC.10Smythite(Fe,Ni)3+xS4 (x=0-0.3)Trig. 3m (3 2/m) : R3m
2.CC.10TroiliteFeSHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.15CherepanoviteRhAsOrth. mmm (2/m 2/m 2/m) : Pnma
2.CC.15Modderite(Co,Fe)AsOrth.
2.CC.15Ruthenarsenite(Ru,Ni)AsOrth.
2.CC.15Westerveldite(Fe,Ni,Co)AsOrth.
2.CC.20Mäkineniteγ-NiSeTrig.
2.CC.20UM1990-38-S:CuFeIrNiPtRh(Ni,Fe,Rh,Cu,Ir,Pt)S
2.CC.25Mackinawite(Fe,Ni)9S8Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
2.CC.30Hexatestibiopanickelite(Pd,Ni)(Sb,Te)Hex.
2.CC.30VavříniteNi2SbTe2Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
2.CC.35aBraggite(Pt,Pd,Ni)STet.
2.CC.35bCooperitePtSTet. 4/mmm (4/m 2/m 2/m) : P42/mmc
2.CC.35aVysotskite(Pd,Ni)STet.

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

2.8.16.2Mäkineniteγ-NiSeTrig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

3.11.1HeazlewooditeNi3S2Trig. 3 2 : R3 2
3.11.2Godlevskite(Ni,Fe)9S8Orth. 2 2 2 : C2 2 2
3.11.4PolydymiteNi2+Ni3+2S4Iso.
3.11.5VaesiteNiS2Iso. m3 (2/m 3) : Pa3
3.11.6ShanditeNi3Pb2S2Trig.
3.11.7DonharrisiteNi3HgS3Mon. 2/m : B2/m
3.11.8ViolariteFe2+Ni3+2S4Iso.
3.11.9Pentlandite(FexNiy)Σ9S8Iso. m3m (4/m 3 2/m) : Fm3m
3.11.10Bravoite(Fe,Ni)S2Iso. m3 (2/m 3) : Pa3
3.11.11SiegeniteCoNi2S4Iso. m3m (4/m 3 2/m) : Fd3m
3.11.12FletcheriteCu(Ni,Co)2S4Iso. m3m (4/m 3 2/m) : Fd3m
3.11.13Villamaninite(Cu,Ni,Co,Fe)S2
3.11.14Mäkineniteγ-NiSeTrig.
3.11.15Sederholmitebeta-NiSeHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.11.16TrüstedtiteNi3Se4Iso.
3.11.17WilkmaniteNi3Se4Mon.
3.11.18KulleruditeNiSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
3.11.19Penroseite(Ni,Co,Cu)Se2Iso. m3 (2/m 3) : Pa3
3.11.20TyrrelliteCu(Co3+,Ni3+)2Se4Iso. m3m (4/m 3 2/m) : Fd3m
3.11.21ImgreiteNiTe (?)Hex.
3.11.22MeloniteNiTe2Trig.
3.11.23KitkaiteNiTeSeTrig.
3.11.24Dienerite
3.11.25OrceliteNi5-xAs2, x ~ 0.25Hex. 6mm : P63mc
3.11.26MaucheriteNi11As8Tet. 4 2 2 : P41 21 2
3.11.27NickelineNiAsHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
3.11.28RammelsbergiteNiAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
3.11.29PararammelsbergiteNiAs2Orth.
3.11.30Nickelskutterudite(Ni,Co,Fe)As3Iso. m3 (2/m 3) : Im3
3.11.31OregoniteNi2FeAs2Hex.
3.11.32Westerveldite(Fe,Ni,Co)AsOrth.
3.11.33Langisite(Co,Ni)AsHex. 6 : P63
3.11.34GersdorffiteNiAsSIso. m3 (2/m 3) : Pa3
3.11.35JolliffeiteNiAsSeIso. m3 (2/m 3) : Pa3
3.11.36BreithauptiteNiSbHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.11.38UllmanniteNiSbSIso. 2 3 : P21 3
3.11.39Willyamite(Co,Ni)SbS

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.

References for MilleriteHide

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.: 239-241.
Canadian Mineralogist (1974) 12: 248-252, 253-257.
Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig, Vandall T. King (1997) Dana's New Mineralogy: The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 81.
Nesbitt, H.W., Schaufuss, A.G., Scaini, M., Bancroft, G.M., and Szargan, R. (2001) XPS measurement of fivefold and six-fold coordinated sulfur in pyrrhotites and evidence for millerite and pyrrhotite surface species. American Mineralogist: 86: 318-326.

Internet Links for MilleriteHide

Localities for MilleriteHide

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Locality ListShow

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