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Moƫloite
A valid IMA mineral species
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About Moƫloite
Dr. Yves Moƫlo
Formula:
Pb6Sb6S14(S3)
Colour:
Greyish-black
Lustre:
Metallic
Specific Gravity:
5.86 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Dr. Yves Moƫlo, Institut des MatƩriaux, CNRS - UniversitƩ de Nantes, France, a specialist of lead sulfosalt mineralogy. He first prepared and studied this compound.
A sulphosalt with a trisulphide anion.
Name Encoding
ASCII-7:
Moeloite
Unique Identifiers
Mindat ID:
27689
Long-form identifier:
mindat:1:1:27689:4
Similar Names
IMA Classification of Moƫloite
Approved
IMA Formula:
Pb2+6Sb3+6S2-14(S3)2-
Approval year:
1998
First published:
2002
Type description reference:
Orlandi, Paolo, Meerschaut, Alain, Palvadeau, Pierre, Merlino, Stefano (2002) Lead-antimony sulfosalts from Tuscany (Italy) V. Definition and crystal structure of moƫloite, Pb6Sb6S14(S3), a new mineral from the Ceragiola marble quarry. European Journal of Mineralogy, 14 (3) 599-606 doi:10.1127/0935-1221/2002/0014-0599
Classification of Moƫloite
2.HC.25
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
Mineral Symbols
As of 2021 there are now IMAāCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| MoĆ« | IMAāCNMNC | Warr, L.N. (2021). IMAāCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Moƫloite
Metallic
Transparency:
Opaque
Colour:
Greyish-black
Comment:
Brownish-red very thin fibers
Streak:
Brown
Tenacity:
Flexible
Density:
5.86 g/cm3 (Calculated)
Optical Data of Moƫloite
Anisotropism:
moderate
Reflectivity:
| Wavelength | R1 (%) | R2 (%) | imR1 (%) | imR2 (%) |
|---|---|---|---|---|
| 400nm | 37.0% | 40.0% | 26.7% | 29.3% |
| 420nm | 38.8% | 40.7% | 25.7% | 27.8% |
| 440nm | 39.2% | 40.8% | 25.3% | 27.6% |
| 460nm | 37.7% | 40.0% | 24.6% | 27.1% |
| 470nm | 37.8% | 40.0% | 24.2% | 26.6% |
| 480nm | 38.2% | 40.0% | 24.3% | 26.6% |
| 500nm | 38.2% | 40.1% | 23.6% | 25.9% |
| 520nm | 37.8% | 39.5% | 23.4% | 25.4% |
| 540nm | 37.1% | 39.2% | 22.8% | 25.0% |
| 546nm | 36.5% | 38.8% | 22.8% | 24.9% |
| 560nm | 36.8% | 38.5% | 22.2% | 24.4% |
| 580nm | 36.5% | 38.7% | 21.6% | 23.7% |
| 589nm | 36.7% | 38.6% | 21.4% | 23.4% |
| 600nm | 36.4% | 38.1% | 21.4% | 23.3% |
| 620nm | 34.5% | 36.9% | 21.0% | 22.2% |
| 640nm | 34.5% | 36.1% | 20.2% | 21.6% |
| 650nm | 34.7% | 36.5% | 20.1% | 21.2% |
| 660nm | 34.6% | 36.1% | 19.7% | 20.7% |
| 680nm | 33.6% | 34.6% | 19.6% | 20.2% |
| 700nm | 32.1% | 33.2% | 18.8% | 19.8% |
| 720nm | 32.2% | 33.0% | 18.1% | 19.2% |
| 740nm | 31.3% | 33.1% | 17.7% | 18.3% |
| 760nm | 29.6% | 31.3% | 17.0% | 17.6% |
| 780nm | 29.4% | 30.8% | 16.9% | 18.0% |
| 800nm | 27.5% | 30.8% | 17.0% | 17.7% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 40.8%.
R1 shown in black, R2 shown in red, imR1 shown in green, imR2 shown in blue
Colour in reflected light:
white
Pleochroism:
Non-pleochroic
Chemistry of Moƫloite
Mindat Formula:
Pb6Sb6S14(S3)
Element Weights:
Elements listed:
Crystallography of Moƫloite
Crystal System:
Orthorhombic
Class (H-M):
222 - Disphenoidal
Space Group:
P21212
Cell Parameters:
a = 15.328 Å, b = 4.04 Å, c = 23.054 Å
Ratio:
a:b:c = 3.794 : 1 : 5.706
Unit Cell V:
1427.6 Ć
Ā³
Z:
2
Madielle quarries, Madielle quarrying basin, Massa, Massa-Carrara Province, Tuscany, Italy