Murunskite
A valid IMA mineral species
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About Murunskite
Formula:
K2(Cu,Fe)4S4
Colour:
Copper-red to pinchbeck-brown
Lustre:
Metallic
Hardness:
3
Specific Gravity:
3.86 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
Named for the Murunskii alkalic massif, the type locality.
Unique Identifiers
Mindat ID:
2814
Long-form identifier:
mindat:1:1:2814:7
GUID
(UUID V4):
(UUID V4):
664e38b7-19bd-4b00-9ff2-2e7d2bf2ca72
Classification of Murunskite
Approved
Type description reference:
2.BD.30
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
D : With Hg, Tl
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
D : With Hg, Tl
2.5.5.3
2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
3.0.6
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
0 : Sulphides etc. of the alkalis
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
0 : Sulphides etc. of the alkalis
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 |
---|---|---|
Mu | 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 Murunskite
Metallic
Transparency:
Opaque
Colour:
Copper-red to pinchbeck-brown
Comment:
iridescent
a fresh surface oxidizes to a sooty black film
Hardness:
3 on Mohs scale
Hardness:
VHN10=92 - 123 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
Imperfect.
Imperfect.
Density:
3.86 g/cm3 (Calculated)
Optical Data of Murunskite
Anisotropism:
Moderate, gray to brownish gray with a bluish tint.
Colour in reflected light:
grayish orange-cream
Chemical Properties of Murunskite
Formula:
K2(Cu,Fe)4S4
Elements listed:
Crystallography of Murunskite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Setting:
I4/mmm
Cell Parameters:
a = 3.8460(10) Å, c = 13.308(3) Å
Ratio:
a:c = 1 : 3.46
Unit Cell V:
196.85 ų (Calculated from Unit Cell)
Z:
1
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0017729 | Murunskite | Pekov I V, Zubkova N V, Lisitsyn D V, Pushcharovsky D Y (2009) Crystal chemistry of murunskite Doklady Earth Sciences 424 139-141 | 2009 | Murun pluton, Eastern Siberia, Russia | 0 | 293 | |
0014368 | Murunskite | Mujica C, Paez J, Llanos J (1994) Synthesis and crystal structure of layered chalcogenides [KCuFeS2 and KCuFeSe2] Materials Research Bulletin 29 263-268 | 1994 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
6.52 Å | (10) |
2.53 Å | (8) |
2.90 Å | (6) |
1.940 Å | (5) |
1.715 Å | (4) |
2.10 Å | (3) |
3.29 Å | (2) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
26 : Hadean detrital minerals | |
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Murunskite
General Appearance of Type Material:
very tiny grains, to 1 µm, and in aggregates
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia (81604)
Geological Setting of Type Material:
rocks that have undergone intensive potassium metasomatism
Associated Minerals at Type Locality:
Reference:
Dobrovolskaya M G, Tsepin A I, Evstigneeva T L, Vyal'sov L N, Zaozerina A O (1981) Kurunskite, K2Cu3FeS4 a new sulfide of potassium, copper, and iron. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 110: 468-473.
Synonyms of Murunskite
Other Language Names for Murunskite
Varieties of Murunskite
Thallium-bearing Murunskite | A variety of Murunskite containing up to 29% (w/w) of thallium. |
Relationship of Murunskite to other Species
Member of:
Other Members of this group:
Bukovite | Tl2(Cu,Fe)4Se4 | Tet. |
Sabatierite | TlCu6Se4 | Orth. |
Thalcusite | Tl2Cu3FeS4 | Tet. |
Related Minerals - Strunz-mindat Grouping
2.BD. | UM2004-33-S:AgCuHgSe | (Ag,Cu)8Hg3(S,Se)7 | |
2.BD. | Vrančiceite | Cu10Hg3S8 | Tric. 1 : P1 |
2.BD.05 | Imiterite | Ag2HgS2 | Mon. 2/m : P21/b |
2.BD.10 | Gortdrumite | Cu24Fe2Hg9S23 | Tric. 1 : P1 |
2.BD.15 | Balkanite | Cu9Ag5HgS8 | Mon. 2/m : P2/m |
2.BD.15 | Danielsite | (Cu,Ag)14HgS8 | Orth. |
2.BD.20 | Donharrisite | Ni3HgS3 | Mon. 2/m : B2/m |
2.BD.25 | Carlinite | Tl2S | Trig. 3 : R3 |
2.BD.30 | Bukovite | Tl2(Cu,Fe)4Se4 | Tet. |
2.BD.30 | Thalcusite | Tl2Cu3FeS4 | Tet. |
2.BD.35 | Rohaite | (Tl,Pb,K)2Cu8.7Sb2S4 | Orth. |
2.BD.40 | Chalcothallite | Tl2(Cu,Fe)6SbS4 | Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm |
2.BD.45 | Sabatierite | TlCu6Se4 | Orth. |
2.BD.50 | Crookesite | Cu7(Tl, Ag)Se4 | Tet. |
2.BD.55 | Brodtkorbite | Cu2HgSe2 | Mon. 2/m : P21/m |
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.
References for Murunskite
Reference List:
Localities for Murunskite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Jordan | |
| Sokol, E.V.; Kokh, S.N.; Seryotkin, Y.V.; Deviatiiarova, A.S.; Goryainov, S.V.; Sharygin, V.V.; Khoury, H.N.; Karmanov, N.S.; Danilovsky, V.A.; Artemyev, D.A. (2020) Ultrahigh-Temperature Sphalerite from Zn-Cd-Se-Rich Combustion Metamorphic Marbles, Daba Complex, Central Jordan: Paragenesis, Chemistry, and Structure. Minerals: 10(9): 822. |
Russia (TL) | |
| Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438. |
| Pekov, I.V., and Agakhanov, A.A. (2008): Geology of Ore Deposits 50(7), 583-589. |
| ZVMO 136(4),63-71(2007) |
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Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia