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Murunskite Mineral Data
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General Murunskite Information
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 Chemical Formula: |
K2Cu3FeS4 |
| Composition: |
Molecular Weight = 452.95 gm |
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Potassium 17.26 % K |
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Iron 12.33 % Fe |
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Copper 42.09 % Cu |
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Sulfur 28.32 % S |
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______ |
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100.00 % |
| Empirical Formula: |
K2Cu3Fe2+S4 |
| Environment: |
In rocks that have undergone intensive potassium metasomatism. |
| IMA Status: |
Approved IMA 1981 |
| Locality: |
Murunskii massif, between the Charo and Tokko Rivers, Olekminsk, Aldan, Yakutia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Murunskite + Pronunciation  |
| Synonym: |
ICSD 75578 |
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PDF 33-1005 |
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Murunskite Crystallography
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| Axial Ratios: |
a:c = 1:3.37628 |
| Cell Dimensions: |
a = 3.88, c = 13.1, Z = 1; V = 197.21 Den(Calc)= 3.81 |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm |
| X Ray Diffraction: |
By Intensity(I/Io): 6.52(1), 2.53(0.8), 2.9(0.6), |
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Physical Properties of Murunskite
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| Cleavage: |
{???} Indistinct |
| Color: |
Blue gray, Copper brown, Black. |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
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Optical Properties of Murunskite
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| RL Anisotrophism: |
Moderate, gray to brownish gray white a bluish tint. |
| RL Color: |
Grayish orange cream. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Murunskite in Air
| λ |
R |
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∑ R(λ) |
| 440 nm |
15.00 |
 |
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| 460 nm |
15.60 |
 |
| 480 nm |
16.60 |
 |
| 500 nm |
17.40 |
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| 520 nm |
18.20 |
 |
| 540 nm |
19.20 |
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| 560 nm |
20.00 |
 |
| 580 nm |
21.00 |
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| 600 nm |
21.80 |
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| 620 nm |
22.60 |
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| 640 nm |
23.30 |
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| 660 nm |
24.00 |
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| 680 nm |
24.60 |
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| 700 nm |
25.40 |
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Calculated Relative Intensity Colors of Murunskite in Air
Relative
Intensity |
0% |
60% |
100% |
120% |
180% |
240% |
300% |
360% |
420% |
480% |
540% |
550% |
| R |
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Calculated Properties of Murunskite
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| Electron Density: |
Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Murunskite =3.81 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0047584522
Boson Index = 0.9952415478 |
| Photoelectric: |
PEMurunskite = 25.74 barns/electron
U=PEMurunskite x relectron= 93.11 barns/cc.
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| Radioactivity: |
GRapi = 236.48 (Gamma Ray American Petroleum Institute Units)
Concentration of Murunskite per GRapi unit = 0.42 (%)
Estimated Radioactivity from Murunskite  - barely detectable
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Murunskite Classification
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| Dana Class: |
02.05.05.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.05)where Am Bn Xp, with (m+n):p=3:2 |
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(02.05.05)Thalcusite Group |
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02.05.05.01 Thalcusite TlCu3FeS4 I 4/mmm 4/m 2/m 2/m |
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02.05.05.02 Bukovite Tl2Cu3FeSe4 I 4/mmm 4/m 2/m 2/m |
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02.05.05.03 Murunskite K2Cu3FeS4 I 4/mmm 4/m 2/m 2/m |
| Strunz Class: |
02.BD.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
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02.BD -With Hg, Tl |
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02.BD.30 Bukovite Tl2Cu3FeSe4 I 4/mmm 4/m 2/m 2/m |
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02.BD.30 Murunskite K2Cu3FeS4 I 4/mmm 4/m 2/m 2/m |
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02.BD.30 Thalcusite TlCu3FeS4 I 4/mmm 4/m 2/m 2/m |
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Other Murunskite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Murunskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Murunskite Specimen Label here :
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Murunskite
K2Cu3FeS4
Dana No: 02.05.05.03 Strunz No: 02.BD.30
Locality:
Notes:
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