Marumoite Mineral Data

Marumoite Mineral Data

General Marumoite Information

Chemical Formula:

Pb32As40S92

Composition:

Molecular Weight = 12577.34 gm

Arsenic 23.83 % As

Lead 52.72 % Pb

Sulfur 23.46 % S

______

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 and Mineral Names (CNMMN)

Synonym:

IMA1998-004

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Marumoite Crystallography

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 - SphenoidalH-M Symbol (2) Space Group: P 2₁

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Physical Properties of Marumoite

Color:

Lead gray.

Diaphaniety:

Opaque

Luster:

Metallic

Calculated Properties of Marumoite

Fermion Index

Fermion Index = 0.11826
Boson Index = 0.88174

Photoelectric:

PE_Marumoite= 958.94 barns/electron
U=PE_Marumoite x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Marumoite is Not Radioactive

Marumoite Classification

Dana Class:

3.7.8.4 (3)Sulfides - Sulfosalts

(3.7)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.7.8)Dana Group

3.7.8.1 Sartorite PbAs2S4 P 2₁/c 2/m

3.7.8.2 Guettardite Pb(Sb,As)2S4 P 2₁/a 2/m

3.7.8.3 Twinnite Pb(Sb,As)2S4 P1 1

3.7.8.4 Marumoite ! Pb32As40S92 P 2₁ 2

Strunz Class:

II/X.00-00 II - Sulfides and sulphosalts

II/X - Unclassified Strunz Sulfides and sulphosalts

II/X.00 - Sulfosalt - As

Other Marumoite Information

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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Marumoite Specimen Label here :

Marumoite

Pb32As40S92
Dana No: 3.7.8.4 Strunz No: II/X.00-00
Locality:

Notes: