Mückeite
A valid IMA mineral species
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About Mückeite
Arno Mücke
Formula:
NiCu(Bi,Sb)S3
Colour:
Light gray with an orange tint
Lustre:
Metallic
Hardness:
3½
Specific Gravity:
5.88
Crystal System:
Orthorhombic
Member of:
Name:
Named by G. Schnorrer-Köhler, U. Neumann, and T. Doering in 1989 in honor of Arno Mücke (b. 1937), Professor at the Mineralogical-Petrological Institute, University of Göttingen, Göttingen, Germany, for his work in systematic and ore mineralogy.
Name Encoding
ASCII-7:
Muckeite
Unique Identifiers
Mindat ID:
2803
Long-form identifier:
mindat:1:1:2803:1
Similar Names
| Makite | |
| Micaite | A rock classification type |
| Mookaite | A rock subtype |
| Muckite | A variety of 'Retinite' |
IMA Classification of Mückeite
Approved
IMA Formula:
Cu1+Ni2+Bi3+S2-3
Approval year:
1988
First published:
1989
Classification of Mückeite
2.GA.25
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
3.4.4.2
3 : SULFOSALTS
4 : ø = 3
3 : SULFOSALTS
4 : ø = 3
5.8.18
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
8 : Sulpharsenites etc. of Mn, Fe, Co and Ni
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
8 : Sulpharsenites etc. of Mn, Fe, Co and Ni
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Müc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Mückeite
Metallic
Transparency:
Opaque
Colour:
Light gray with an orange tint
Streak:
Gray-black
Hardness:
3½ on Mohs scale
Hardness:
VHN100=136 - 165 kg/mm2 - Vickers
Hardness Data:
Measured
Cleavage:
Very Good
Very good {010}, good {001}
Very good {010}, good {001}
Density:
5.88 g/cm3 (Measured) 6.07 g/cm3 (Calculated)
Comment:
Measured value is low due to intergrown sulfides.
Optical Data of Mückeite
Anisotropism:
Weak in air, stronger in oil
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 470nm | 35.7% | 36.4% |
| 546nm | 34.1% | 39.0% |
| 589nm | 39.8% | 40.2% |
| 650nm | 40.9% | 42.3% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 42.3%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Creamy gray to light gray with a yellow-brown tint in air, olive-tinted gray to yellow-brown in oil.
Pleochroism:
Visible
Comments:
Distinct in air and strong in oil.
Chemistry of Mückeite
Mindat Formula:
NiCu(Bi,Sb)S3
Element Weights:
Crystallography of Mückeite
Crystal System:
Orthorhombic
Class (H-M):
222 - Disphenoidal
Space Group:
P212121
Cell Parameters:
a = 7.51 Å, b = 12.55 Å, c = 4.88 Å
Ratio:
a:b:c = 0.598 : 1 : 0.389
Unit Cell V:
459.94 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Tabular {010}, elongate [100], showing {100}, {010}, {001}, {101}, and another (hk0).
Comment:
Ranges given are: a = 7.509(2)-7.514(3), b = 12.551(2)-12.557(6), c = 4.877(1)-4.8880(2) Å.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.177 Å | (80) |
| 2.975 Å | (100) |
| 2.895 Å | (40) |
| 2.232 Å | (30) |
| 2.159 Å | (30) |
| 2.087 Å | (60) |
| 1.863 Å | (50) |
| 1.837 Å | (70) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Mückeite
General Appearance of Type Material:
Subhedral to euhedral crystals up to 1 mm long.
Place of Conservation of Type Material:
Göttingen University, Göttingen, Germany.
Tübingen University, Tübingen, Germany.
Tübingen University, Tübingen, Germany.
Geological Setting of Type Material:
In dump material at a polymetallic hydrothermal deposit, topotactically relacing lapieite.
Associated Minerals at Type Locality:
Synonyms of Mückeite
Other Language Names for Mückeite
Relationship of Mückeite to other Species
Member of:
Other Members of Lapieite Group:
| Lapieite | NiCuSbS3 | Orth. 222 : P212121 |
| Lisiguangite | PtCuBiS3 | Orth. 222 : P212121 |
| Malyshevite | PdCuBiS3 | Orth. mmm(2/m2/m2/m) : Pmmm |
| Roterbärite | PdBiCuSe3 | Orth. 222 : P212121 |
Common Associates
Associations Based on Photo Data:
| 1 photo of Mückeite associated with Millerite | NiS |
| 1 photo of Mückeite associated with Polydymite | Ni2+Ni3+2S4 |
Related Minerals - Strunz-mindat Grouping
| 2.GA. | Pyradoketosite | Ag3SbS3 |
| 2.GA. | Arsiccioite | AgHg2Tl(As,Sb)2S6 |
| 2.GA. | Eckerite | Ag2CuAsS3 |
| 2.GA.05 | Proustite | Ag3AsS3 |
| 2.GA.05 | Pyrargyrite | Ag3SbS3 |
| 2.GA.10 | Xanthoconite | Ag3AsS3 |
| 2.GA.10 | Pyrostilpnite | Ag3SbS3 |
| 2.GA.15 | Samsonite | Ag4MnSb2S6 |
| 2.GA.20 | Bytízite | Cu3SbSe3 |
| 2.GA.20 | Skinnerite | Cu3SbS3 |
| 2.GA.20 | Wittichenite | Cu3BiS3 |
| 2.GA.25 | Lapieite | NiCuSbS3 |
| 2.GA.25 | Lisiguangite | PtCuBiS3 |
| 2.GA.25 | Malyshevite | PdCuBiS3 |
| 2.GA.25 | Roterbärite | PdBiCuSe3 |
| 2.GA.30 | Aktashite | Cu6Hg3As4S12 |
| 2.GA.30 | Nowackiite | Cu6Zn3As4S12 |
| 2.GA.30 | Zhengminghuaite | Cu6Fe3As4S12 |
| 2.GA.30 | Gruzdevite | Cu6Hg3Sb4S12 |
| 2.GA.35 | Laffittite | AgHgAsS3 |
| 2.GA.40 | 'Unnamed (Ag-Fe endmember of Routhierite Group)' | AgFe2TlAs2S6 |
| 2.GA.40 | Routhierite | Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6 |
| 2.GA.40 | Stalderite | Tl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6 |
| 2.GA.40 | Ralphcannonite | AgZn2TlAs2S6 |
| 2.GA.40 | Ferrostalderite | CuFe2TlAs2S6 |
| 2.GA.45 | Erniggliite | Tl2SnAs2S6 |
| 2.GA.50 | Cerromojonite | CuPbBiSe3 |
| 2.GA.50 | Seligmannite | PbCuAsS3 |
| 2.GA.50 | Součekite | CuPbBi(S,Se)3 |
| 2.GA.50 | 'Unnamed (Pb-Cu-Bi Selenide)' | PbCuBiSe3 |
| 2.GA.50 | Bournonite | PbCuSbS3 |
| 2.GA.55 | Eldragónite | Cu6BiSe4(Se2) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Mückeite
mindat.org URL:
https://www.mindat.org/min-2803.html
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References for Mückeite
Reference List:
Localities for Mückeite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Germany (TL) | |
| Schnorrer-Köhler et al. (1989) +2 other references |
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Grüneau Mine, Schutzbach, Daaden-Herdorf, Altenkirchen, Rhineland-Palatinate, Germany