Moeloite Mineral Data

Moeloite Mineral Data

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General Moeloite Information

Chemical Formula:

Pb6Sb6S14(S3)

Composition:

Molecular Weight = 2,518.82 gm

Antimony 29.00 % Sb

Lead 49.36 % Pb

Sulfur 21.64 % S

______

100.00 %

Empirical Formula:

Pb₆Sb₆S₁₇

Environment:

Small cavities in marble.

IMA Status:

Approved IMA 2002, Dana # Added

Locality:

Ceragiola marble quarry near Seravezza, Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Yves Moelo who synthesized and characterized the synthetic material prior to the discovery of the mineral.

Synonym:

IMA1998-045

Moeloite Image

Images:

Moeloite

Comments: Dark gray, metallic grains of moelite on white dolomite.
Location: Cava Ceragiola, Seravezza, Lucca, Italy. Scale: Picture size 2 cm.
© Dave Barthelmy

Moeloite Crystallography

Axial Ratios:

a:b:c =3.794:1:5.7064

Cell Dimensions:

a = 15.328, b = 4.04, c = 23.054, Z = 2; V = 1,427.62 Den(Calc)= 5.86

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁221

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

By Intensity(I/I_o): 3.427(1)(403), 2.017(0.8)(614,020), 2.753(0.75),2.779(0.75)(016,314), 2.844(0.75)(503,215), 3.047(0.75)(312,214), 3.724(0.75)(106,112), 1.733(0.5)(0.1.12,618,2.02.422(0.5),

Crystal Structure:

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Orlandi P , Meerschaut A , Palvadeau P , Merlino S , European Journal of Mineralogy , 14 (2002) p.599-606, Lead-antimony sulfosalts from Tuscany (Italy). V. Definition and crystal, structure of moeloite, Pb6Sb6S14(S3), a new mineral from the Ceragiola, marble quarry, Locality: Tuscany, Italy

Physical Properties of Moeloite

Color:

Grayish black, Brownish red.

Diaphaniety:

Opaque

Fracture:

Flexible - Flexible fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Plumose - "Mica-like" minerals forming aggregates of plume-like forms.

Luster:

Metallic

Streak:

brown

Optical Properties of Moeloite

RL Anisotrophism:

Moderate.

RL Bireflectance:

Weak.

RL Color:

White with rare red internal reflections in oil.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Moeloite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	40.00	37.80
546 nm	38.80	36.50
589 nm	38.60	36.70
650 nm	36.50	34.70

**Standardized Intensity (100%) Reflection Spectra of Moeloite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	26.60	24.20
546 nm	24.90	22.80
589 nm	23.40	21.40
650 nm	21.20	20.10

**Calculated Relative Intensity Colors of Moeloite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	250%
R₁
R₂

**Calculated Relative Intensity Colors of Moeloite in Oil**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	420%
R₁
R₂

Calculated Properties of Moeloite

Electron Density:

r_electron=4.98 gm/cc
note: r_Moeloite=5.86 gm/cc.

Fermion Index

Fermion Index = 0.1107
Boson Index = 0.8893

Photoelectric:

PE_Moeloite= 993.49 barns/electron
U=PE_Moeloite x r_electron=4,946.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Moeloite is Not Radioactive

Moeloite Classification

Dana Class:

3.4.8.3 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.8)Dana Group

3.4.8.1 Wittichenite Cu3BiS3 P 2₁2₁2₁ 2 2 2

3.4.8.2 Skinnerite Cu3SbS3 P 2₁/c 2/m

3.4.8.3 Moeloite ! Pb6Sb6S14(S3) P 2₁221 2 2 2

Strunz Class:

II/E.19-42 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with predominant Antimon x = 3.0 - 1.9

II/E.19 - Falkmanite - Jaskolskiite series

II/E.19-10 Falkmanite Pb5Sb4S11 Mono

II/E.19-20 Ardaite Pb19Sb13S35Cl7 Unk Mono

II/E.19-30 Boulangerite Pb5Sb4S11 Unk Ortho

II/E.19-40 Plumosite* Pb2Sb2S5 Mono

II/E.19-42 Moeloite Pb6Sb6S14(S3) P 2₁221 2 2 2

II/E.19-45 Pillaite! Pb9Sb10S23ClO0.5 C 2/m 2/m

II/E.19-50 Jaskolskiite Pb2xCux(Sb,Bi)2-xS5,x=0.2 Pbnm 2/m 2/m 2/m

Other Moeloite Information

References:

NAME( AmMin, Vol 88, p 477) PHYS. PROP.(AmMin, Vol 88, p 477) OPTIC PROP.(AmMin, Vol 88, p 477)

See Also:

Links to other databases for Moeloite :
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 Moeloite Specimen Label here :

Moeloite

Pb6Sb6S14(S3)
Dana No: 3.4.8.3 Strunz No: II/E.19-42
Locality:

Notes: