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Marumoite Mineral Data
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General Marumoite Information
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 Chemical Formula: |
Pb32As40S92 |
| Composition: |
Molecular Weight = 12577.34 gm |
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Arsenic 23.83 % As |
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Lead 52.72 % Pb |
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Sulfur 23.46 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb32As40S92 |
| Environment: |
A member of the rathite (sartorite) group |
| IMA Status: |
Proposed IMA 1998 (Dana # Added) |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA1998-004 |
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Marumoite Crystallography
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| Axial Ratios: |
a:b:c =0.0722:1:0.0682 |
| Cell Dimensions: |
a = 8.368, b = 115.75, c = 7.903, Z = 2; beta = 90.11° V = 7,654.80 Den(Calc)= 5.46 |
| Crystal System: |
Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.978(1), 3.663(0.7), 2.339(0.65),2.735(0.6), 2.713(0.5), 2.872(0.48), 3.216(0.48), |
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Physical Properties of Marumoite
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| Color: |
Lead gray. |
| Diaphaneity: |
Opaque |
| Luster: |
Metallic |
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Calculated Properties of Marumoite
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| Electron Density: |
Bulk Density (Electron Density)=4.70 gm/cc
note: Specific Gravity of Marumoite =5.46 gm/cc.
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| Fermion Index: |
Fermion Index = 0.11
Boson Index = 0.89 |
| Photoelectric: |
PEMarumoite = 958.94 barns/electron
U=PEMarumoite x rElectron Density=4,509.24 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Marumoite is Not Radioactive |
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Marumoite Classification
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| Dana Class: |
03.07.08.04 (03)Sulfides - Sulfosalts |
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(03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.07.08)Sartorite Group |
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03.07.08.01 Sartorite PbAs2S4 P 21/c 2/m |
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03.07.08.02 Guettardite Pb(Sb,As)2S4 P 21/a 2/m |
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03.07.08.03 Twinnite Pb(Sb,As)2S4 P1 1 |
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03.07.08.04 Marumoite! Pb32As40S92 P 21 2 |
| Strunz Class: |
02.HC.05g 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HC -With only Pb |
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02.HC.05g Marumoite! Pb32As40S92 P 21 2 |
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Other Marumoite Information
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| References: |
NAME( CanMin, Vol 38) PHYS. PROP.(CanMin, Vol 38) |
| See Also: |
Links to other databases for Marumoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Marumoite Specimen Label here :
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Marumoite
Pb32As40S92
Dana No: 03.07.08.04 Strunz No: 02.HC.05g
Locality:
Notes:
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