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Ramdohrite Mineral Data
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General Ramdohrite Information
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 Chemical Formula: |
Ag3Pb6Sb11S24 |
| Composition: |
Molecular Weight = 3,675.64 gm |
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Silver 8.80 % Ag |
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Antimony 36.44 % Sb |
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Lead 33.82 % Pb |
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Sulfur 20.94 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Ag3Pb6Sb11S24 |
| Environment: |
Found in fine-grained quartz in a vein of hydrothermal origin. |
| IMA Status: |
Valid Species (Pre-IMA) 1930 |
| Locality: |
Chocaya la vieja, in Potosi, Bolovia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Paul Ramdohr (1890-1985), German mineralogist. |
| Name Pronunciation: |
Ramdohrite + Pronunciation  |
| Synonym: |
ICSD 31237 |
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PDF 42-1415 |
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Ramdohrite Crystallography
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| Axial Ratios: |
a:b:c =1.4709:1:0.6674 |
| Cell Dimensions: |
a = 19.24, b = 13.08, c = 8.73, Z = 2; beta = 90.28° V = 2,196.96 Den(Calc)= 5.56 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/n |
| X Ray Diffraction: |
By Intensity(I/Io): 3.33(1), 2.91(0.6), 3.45(0.4), |
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Physical Properties of Ramdohrite
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| Color: |
Bluish black gray. |
| Density: |
5.33 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Habit: |
Tabular - Form dimensions are thin in one direction. |
| Hardness: |
2 - Gypsum |
| Luster: |
Metallic |
| Streak: |
gray black |
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Optical Properties of Ramdohrite
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| Optical Data: |
NCalc= 1.36 - from Gladstone-Dale relationship (KC = 0.0643) where Ncalc=Dcalc*KC+1
NCalc= 1.34 - from Gladstone-Dale relationship (KC = 0.0643) where Ncalc=Dmeas*KC+1
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| RL Anisotrophism: |
Moderate. |
| RL Color: |
White. |
| RL Pleochroism: |
Very weak. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Ramdohrite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
39.30 |
43.10 |
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| 420 nm |
38.80 |
42.80 |
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| 440 nm |
38.30 |
42.50 |
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| 460 nm |
37.80 |
42.20 |
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| 480 nm |
37.40 |
42.00 |
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| 500 nm |
36.90 |
41.60 |
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| 520 nm |
36.50 |
41.20 |
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| 540 nm |
36.00 |
40.90 |
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| 560 nm |
35.70 |
40.50 |
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| 580 nm |
35.30 |
40.20 |
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| 600 nm |
34.80 |
39.70 |
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| 620 nm |
34.40 |
39.20 |
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| 640 nm |
34.00 |
38.70 |
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| 660 nm |
33.40 |
38.00 |
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| 680 nm |
32.80 |
37.30 |
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| 700 nm |
32.00 |
36.40 |
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Calculated Relative Intensity Colors of Ramdohrite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
260% |
| R1 |
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| R2 |
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Calculated Properties of Ramdohrite
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| Electron Density: |
Bulk Density (Electron Density)=4.77 gm/cc
note: Specific Gravity of Ramdohrite =5.56 gm/cc.
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| Fermion Index: |
Fermion Index = 0.07
Boson Index = 0.93 |
| Photoelectric: |
PERamdohrite = 754.12 barns/electron
U=PERamdohrite x rElectron Density=3,600.13 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ramdohrite is Not Radioactive |
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Ramdohrite Classification
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| Dana Class: |
03.04.15.06 (03)Sulfides - Sulfosalts |
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(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.04.15)Lillianite Group (Orthorhombic, AmBnS6 where A=Pb, Ag, Mn and B=Sb, Bi) |
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03.04.15.01 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m |
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03.04.15.02 Bursaite? Pb5Bi4S11 Bbmm 2/m 2/m 2/m |
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03.04.15.03 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m |
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03.04.15.04 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m |
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03.04.15.05 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m |
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03.04.15.06 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m |
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03.04.15.07 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m |
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03.04.15.08 Fizelyite Pb14Ag5Sb21S48(?) P 21/n 2/m |
| Strunz Class: |
02.JB.40a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JB -Galena derivatives, with Pb |
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02.JB.40a Fizelyite Pb14Ag5Sb21S48(?) P 21/n 2/m |
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02.JB.40a Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m |
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02.JB.40a Bursaite? Pb5Bi4S11 Bbmm 2/m 2/m 2/m |
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02.JB.40a Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m |
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02.JB.40a Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m |
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02.JB.40a Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m |
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02.JB.40a Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m |
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02.JB.40a Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m |
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02.JB.40a Xilingolite Pb3Bi2S6 C 2/m 2/m |
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02.JB.40a Treasurite Ag7Pb6Bi15S32 B2/m 2/m |
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02.JB.40a Vikingite Ag5Pb8Bi13S30 C 2/m 2/m |
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Other Ramdohrite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Ramdohrite :
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
14 - WWW-MINCRYST
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Print or Cut-and-Paste your Ramdohrite Specimen Label here :
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Ramdohrite
Ag3Pb6Sb11S24
Dana No: 03.04.15.06 Strunz No: 02.JB.40a
Locality:
Notes:
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