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Millerite

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Formula:
NiS
System:TrigonalColour:Pale brass-yellow, with ...
Lustre:MetallicHardness:3 - 3½
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 jack-straw clusters of shiny metallic acicular crystals, pale brass-yellow with an iridescent tarnish.

Classification of Millerite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/C.21-30
Nickel-Strunz 10th (pending) edition ID: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 edition ID:2.8.16.1
Dana 8th edition ID:2.8.16.1

2 : SULFIDES
8 : AmXp, with m:p = 1:1
Hey's CIM Ref.: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
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Type Occurrence of Millerite

Type Locality:Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mtns (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
Year of Discovery:1845

Occurrences of Millerite

Geological Setting:A low-temperature mineral which occurs in sulfidic limestones and dolostones, and as a late-forming mineral in nickel sulfide deposits.

Physical Properties of Millerite

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

Crystallography of Millerite

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 9.607Å, c = 3.143Å
Ratio:a:c = 1 : 0.327
Unit Cell Volume:V 251.22 ų (Calculated from Unit Cell)
Z:9
Morphology:Acicular crystals in radiating or jack-straw clusters; also massive.
Twinning:None reported.
Crystal Atlas:
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Millerite - prismatic {100}

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are 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 Diffraction:
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)

Optical Data of Millerite

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

Chemical Properties of Millerite

Formula:
NiS
Essential elements:Ni, S
All elements listed in formula:Ni, S
Common Impurities:Fe,Co,Cu

Relationship of Millerite 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.20Mäkinenite
γ-NiSe
2.CC.20UM1990-38-S:CuFeIrNiPtRh
(Ir,Pt,Ni,Fe)S
2.CC.25Mackinawite
(Fe,Ni)
 
9
S
 
8
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:

- +
3.11.1Heazlewoodite
Ni
 
3
S
 
2
3.11.2Godlevskite
(Ni,Fe)
 
9
S
 
8
3.11.4Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
3.11.5Vaesite
NiS
 
2
3.11.6Shandite
Ni
 
3
Pb
 
2
S
 
2
3.11.7Donharrisite
Ni
 
8
Hg
 
3
S
 
9
3.11.8Violarite
Fe
2+
 
Ni
3+
2
S
 
4
3.11.9Pentlandite
(Fe,Ni)
 
9
S
 
8
3.11.10Bravoite
(Fe,Ni)S
 
2
3.11.11Siegenite
CoNi
 
2
S
 
4
-NiCo
 
2
S
 
4
3.11.12Fletcherite
Cu(Ni,Co)
 
2
S
 
4
3.11.13Villamaninite
(Cu,Ni,Co,Fe)S
 
2
3.11.14Mäkinenite
γ-NiSe
3.11.15Sederholmite
beta-NiSe
3.11.16Trüstedtite
Ni
 
3
Se
 
4
3.11.17Wilkmanite
Ni
 
3
Se
 
4
3.11.18Kullerudite
NiSe
 
2
3.11.19Penroseite
(Ni,Co,Cu)Se
 
2
3.11.20Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
3.11.21Imgreite
NiTe (?)
3.11.22Melonite
NiTe
 
2
3.11.23Kitkaite
NiTeSe
3.11.24Dienerite
3.11.25Orcelite
Ni
 
5-x
As
 
2
3.11.26Maucherite
Ni
 
11
As
 
8
3.11.27Nickeline
NiAs
3.11.28Rammelsbergite
NiAs
 
2
3.11.29Pararammelsbergite
NiAs
 
2
3.11.30Nickelskutterudite
NiAs
 
2-3
3.11.31Oregonite
Ni
 
2
FeAs
 
2
3.11.32Westerveldite
(Fe,Ni,Co)As
3.11.33Langisite
(Co,Ni)As
3.11.34Gersdorffite
NiAsS
3.11.35Jolliffeite
NiAsSe
3.11.36Breithauptite
NiSb
3.11.38Ullmannite
NiSbS
3.11.39Willyamite
(Co,Ni)SbS
Related Minerals - Dana Grouping):

- +
2.8.16.1Mäkinenite
γ-NiSe

Other Names for Millerite

Synonyms:
ArchiseCapillary PyritesCapilloseHair PyritesNickel Pyrite
Trichopyrite
Other Languages:
Basque:Millerita
Finnish:Milleriitti
German:Millerit
Gelbnickelkies
Haarkies
Trichopyrit
Italian:Millerite
Polish:Milleryt
Russian:Миллерит
Simplified Chinese:针镍矿
硫化镍
针硫镍矿
Spanish:Millerita
Trichopyrita

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 Millerite

Reference List:

- +
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.

Best Localities for Millerite

Best of Species:Millerite

Internet Links for Millerite

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    Localities for Millerite

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