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![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Aschamalmite Mineral Data
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General Aschamalmite Information
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Chemical Formula: |
Pb6Bi2S9 |
Composition: |
Molecular Weight = 1,949.75 gm |
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Bismuth 21.44 % Bi |
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Lead 63.76 % Pb |
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Sulfur 14.80 % S |
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______ |
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100.00 % |
Empirical Formula: |
Pb6Bi2S9 |
Environment: |
In alpine cleft veins, cutting gneiss. |
IMA Status: |
Approved IMA 1983 |
Locality: |
Ascham Alm, Untersulzbachtal, Austria. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Name Pronunciation: |
Aschamalmite + Pronunciation |
Synonym: |
Beegerite |
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Aschamalmite Image |
Images:
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Aschamalmite
Comments: Black metallic blades of aschamalmite associated with beige rhombic siderite.
Location: Costabella, Osiglia, SV, Italy.
Scale: Crystal Size: 1 mm.
© Carlo Guidarin |
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Images:
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Aschamalmite
Comments: Lead gray metallic prismatic aschamalmite crystals in veins in quartz.
Location: Ascham Alp, Untersulzbach Valley, Salzburg, Austria.
Scale: See Image.
© Rruff Database |
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Aschamalmite Crystallography
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Axial Ratios: |
a:b:c =3.352:1:7.6845 |
Cell Dimensions: |
a = 13.71, b = 4.09, c = 31.43, Z = 4; beta = 91° V = 1,762.13 Den(Calc)= 7.35 |
Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.426(1), 3.378(0.88), 2.941(0.54), |
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Physical Properties of Aschamalmite
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Cleavage: |
{001} Perfect |
Color: |
Lead gray, Gray. |
Density: |
7.27 |
Diaphaneity: |
Opaque |
Habit: |
Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape. |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Hardness: |
3.5 - Copper Penny |
Luminescence: |
Non-fluorescent. |
Luster: |
Metallic |
Magnetism: |
Nonmagnetic |
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Optical Properties of Aschamalmite
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RL Anisotrophism: |
Moderate, from gray to red-brown. |
RL Color: |
Creamy white. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Aschamalmite in Air
λ |
R1 |
R2 |
![](../images/Reflect_scale_v.gif) |
∑ R1(λ) |
∑ R2(λ) |
400 nm |
48.80 |
44.10 |
![](../images/400nm.BMP)
![](../images/400nm.BMP) |
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420 nm |
48.20 |
43.50 |
![](../images/420nm.BMP)
![](../images/420nm.BMP) |
440 nm |
47.50 |
43.00 |
![](../images/440nm.BMP)
![](../images/440nm.BMP) |
460 nm |
46.70 |
42.50 |
![](../images/460nm.BMP)
![](../images/460nm.BMP) |
480 nm |
46.40 |
42.10 |
![](../images/480nm.BMP)
![](../images/480nm.BMP) |
500 nm |
45.80 |
41.70 |
![](../images/500nm.BMP)
![](../images/500nm.BMP) |
520 nm |
44.80 |
41.10 |
![](../images/520nm.BMP)
![](../images/520nm.BMP) |
540 nm |
44.30 |
40.50 |
![](../images/540nm.BMP)
![](../images/540nm.BMP) |
546 nm |
44.00 |
40.10 |
![](../images/546nm.BMP)
![](../images/546nm.BMP) |
560 nm |
43.90 |
40.00 |
![](../images/560nm.BMP)
![](../images/560nm.BMP) |
580 nm |
43.80 |
39.70 |
![](../images/580nm.BMP)
![](../images/580nm.BMP) |
589 nm |
43.50 |
39.40 |
![](../images/589nm.BMP)
![](../images/589nm.BMP) |
600 nm |
43.50 |
39.30 |
![](../images/600nm.BMP)
![](../images/600nm.BMP) |
620 nm |
43.30 |
39.00 |
![](../images/620nm.BMP)
![](../images/620nm.BMP) |
640 nm |
43.20 |
38.80 |
![](../images/640nm.BMP)
![](../images/640nm.BMP) |
650 nm |
43.10 |
38.70 |
![](../images/650nm.BMP)
![](../images/650nm.BMP) |
660 nm |
43.00 |
38.70 |
![](../images/660nm.BMP)
![](../images/660nm.BMP) |
680 nm |
42.90 |
38.70 |
![](../images/680nm.BMP)
![](../images/680nm.BMP) |
700 nm |
42.90 |
38.40 |
![](../images/700nm.BMP)
![](../images/700nm.BMP) |
Calculated Relative Intensity Colors of Aschamalmite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
230% |
R1 |
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R2 |
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Calculated Properties of Aschamalmite
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Electron Density: |
Bulk Density (Electron Density)=6.05 gm/cc note: Specific Gravity of Aschamalmite =7.35 gm/cc. |
Fermion Index: |
Fermion Index = 0.14 Boson Index = 0.86 |
Photoelectric: |
PEAschamalmite =1,610.06 barns/electron U=PEAschamalmite x rElectron Density=9,735.42 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Aschamalmite is Not Radioactive |
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Aschamalmite Classification
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Dana Class: |
03.01.11.01 (03)Sulfides - Sulfosalts |
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(03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.01.11)Dana Group |
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03.01.11.01 Aschamalmite Pb6Bi2S9 C 2/m 2/m |
Strunz Class: |
02.JB.40b 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.40b Aschamalmite Pb6Bi2S9 C 2/m 2/m |
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02.JB.40b Eskimoite Ag7Pb10Bi15S36 Am m |
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02.JB.40b Heyrovskyite Pb10AgBi5S18 C mcm 2/m 2/m 2/m |
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Other Aschamalmite Information
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References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(CanMin, v 41, p 431) |
See Also: |
Links to other databases for Aschamalmite :
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 Aschamalmite Specimen Label here :
Aschamalmite
Pb6Bi2S9
Dana No: 03.01.11.01 Strunz No: 02.JB.40b
Locality:
Notes:
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