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Radhakrishnaite Mineral Data
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General Radhakrishnaite Information
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 Chemical Formula: |
PbTe3(Cl,S)2 |
| Composition: |
Molecular Weight = 657.52 gm |
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Tellurium 58.22 % Te |
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Lead 31.51 % Pb |
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Sulfur 4.88 % S |
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Chlorine 5.39 % Cl |
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______ |
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100.00 % |
| Empirical Formula: |
PbTe3ClS |
| Environment: |
A primary mineral, in a hydrothermal gold-quartz vein containing sulfides and tellurides. |
| IMA Status: |
Approved IMA 1987 |
| Locality: |
Champion Reef mine, Kolar gold fields, Karnataka, India. Link to MinDat.org Location Data. |
| Name Origin: |
Named after B. P. Radhakrishna (1918-), Indian mineralogist. |
| Name Pronunciation: |
Radhakrishnaite + Pronunciation  |
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Radhakrishnaite Image |
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Images:
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Radhakrishnaite Kolarite
Comments: Kolarite (1) and radhakrishnaite (2), replacing altaite (white) in galena (ight grey). (CanMin, v23:501).
Location: 1500 m level, Kolar gold deposit, India.
Scale: Scale Bar 0.02 mm.
© Canadian Mineralogist |
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Images:
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Radhakrishnaite
Comments: Polished Section image of radhakrishnaite (Rad) with bluish to brownish tarnishing colors.
Location: Oktyabrsky Mine, Norilsk, Russia.
Scale: Picture Size 0.16 mm.
© Thomas Witzke |
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Radhakrishnaite Crystallography
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| Axial Ratios: |
a:c = 1:0.66024 |
| Cell Dimensions: |
a = 5.71, c = 3.77, Z = 1; V = 122.92 Den(Calc)= 8.88 |
| Crystal System: |
Tetragonal Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 3.16(1), 3.78(0.6), 1.92(0.5), |
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Physical Properties of Radhakrishnaite
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| Color: |
Gray, Reddish brown. |
| Diaphaneity: |
Opaque |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Luster: |
Metallic |
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Optical Properties of Radhakrishnaite
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| RL Anisotrophism: |
Distinct. |
| RL Color: |
Rose-brown. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Radhakrishnaite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
23.70 |
24.30 |
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| 420 nm |
24.70 |
25.20 |
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| 440 nm |
25.60 |
26.10 |
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| 460 nm |
26.60 |
27.10 |
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| 480 nm |
27.60 |
28.20 |
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| 500 nm |
28.60 |
29.20 |
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| 520 nm |
29.60 |
30.10 |
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| 540 nm |
30.30 |
31.00 |
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| 560 nm |
31.10 |
31.80 |
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| 580 nm |
31.80 |
32.40 |
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| 600 nm |
32.40 |
32.90 |
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| 620 nm |
32.70 |
33.30 |
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| 640 nm |
33.00 |
33.50 |
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| 660 nm |
33.20 |
33.60 |
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| 680 nm |
33.20 |
33.60 |
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| 700 nm |
33.20 |
33.60 |
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Calculated Relative Intensity Colors of Radhakrishnaite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
340% |
| R1 |
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| R2 |
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Calculated Properties of Radhakrishnaite
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| Electron Density: |
Bulk Density (Electron Density)=7.32 gm/cc
note: Specific Gravity of Radhakrishnaite =8.88 gm/cc.
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| Fermion Index: |
Fermion Index = 0.11
Boson Index = 0.89 |
| Photoelectric: |
PERadhakrishnaite = 804.20 barns/electron
U=PERadhakrishnaite x rElectron Density=5,886.64 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Radhakrishnaite is Not Radioactive |
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Radhakrishnaite Classification
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| Dana Class: |
02.15.04.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.15)(Chlorides) |
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(02.15.04)Dana Group |
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02.15.04.01 Radhakrishnaite PbTe3(Cl,S)2 Unk Tetra |
| Strunz Class: |
03.AA.50 03 - HALIDES |
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03.A - Simple Halides, Without H2O |
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03.AA -M:X = 1:1, 2:3, 3:5, etc. |
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03.AA.50 Radhakrishnaite PbTe3(Cl,S)2 Unk Tetra |
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Other Radhakrishnaite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Radhakrishnaite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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Radhakrishnaite
PbTe3(Cl,S)2
Dana No: 02.15.04.01 Strunz No: 03.AA.50
Locality:
Notes:
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