General Moeloite Information
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Chemical Formula: |
Pb6Sb6S14(S3) |
Composition: |
Molecular Weight = 2,518.82 gm |
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Antimony 29.00 % Sb |
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Lead 49.36 % Pb |
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Sulfur 21.64 % S |
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______ |
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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 |
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Moeloite Image |
Images:
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Moeloite
Comments: Dark gray, metallic grains of moelite on white dolomite.
Location: Cava Ceragiola, Seravezza, Lucca, Italy.
Scale: Picture size 2 cm.
© Dave Barthelmy |
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Moeloite Crystallography
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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 |
X Ray Diffraction: |
By Intensity(I/Io): 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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drag2 - RMB Resize/Rotate
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Help on Above
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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
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Physical Properties of Moeloite
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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 |
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Optical Properties of Moeloite
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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 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
40.00 |
37.80 |

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| 546 nm |
38.80 |
36.50 |

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| 589 nm |
38.60 |
36.70 |

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| 650 nm |
36.50 |
34.70 |

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Standardized Intensity (100%) Reflection Spectra of Moeloite in Oil
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
26.60 |
24.20 |

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| 546 nm |
24.90 |
22.80 |

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| 589 nm |
23.40 |
21.40 |

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| 650 nm |
21.20 |
20.10 |

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Calculated Relative Intensity Colors of Moeloite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
250% |
| R1 |
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Calculated Relative Intensity Colors of Moeloite in Oil
Relative Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
420% |
| R1 |
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| R2 |
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Calculated Properties of Moeloite
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Electron Density: |
relectron=4.98 gm/cc note: rMoeloite =5.86 gm/cc. |
Fermion Index |
Fermion Index = 0.1107 Boson Index = 0.8893 |
Photoelectric: |
PEMoeloite = 993.49 barns/electron U=PEMoeloite x relectron=4,946.28 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Moeloite is Not Radioactive |
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Moeloite Classification
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Dana Class: |
3.4.8.3 (3)Sulfides - Sulfosalts |
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(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(3.4.8)Dana Group |
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3.4.8.1 Wittichenite Cu3BiS3 P 212121 2 2 2 |
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3.4.8.2 Skinnerite Cu3SbS3 P 21/c 2/m |
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3.4.8.3 Moeloite ! Pb6Sb6S14(S3) P 21221 2 2 2 |
Strunz Class: |
II/E.19-42 II - Sulfides and sulphosalts |
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II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with predominant Antimon x = 3.0 - 1.9 |
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II/E.19 - Falkmanite - Jaskolskiite series |
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II/E.19-10 Falkmanite Pb5Sb4S11 Mono |
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II/E.19-20 Ardaite Pb19Sb13S35Cl7 Unk Mono |
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II/E.19-30 Boulangerite Pb5Sb4S11 Unk Ortho |
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II/E.19-40 Plumosite* Pb2Sb2S5 Mono |
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II/E.19-42 Moeloite Pb6Sb6S14(S3) P 21221 2 2 2 |
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II/E.19-45 Pillaite! Pb9Sb10S23ClO0.5 C 2/m 2/m |
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II/E.19-50 Jaskolskiite Pb2xCux(Sb,Bi)2-xS5,x=0.2 Pbnm 2/m 2/m 2/m |
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Other Moeloite Information
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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 :
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Moeloite
Pb6Sb6S14(S3)
Dana No: 3.4.8.3 Strunz No: II/E.19-42
Locality:
Notes:
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