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Moëloite

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Big Photo

Seravezza Quarries, Seravezza, Apuan Alps, Lucca Province, Tuscany, Italy
© Sandro Maggia

Show Moëloite Photos (5)



Formula:
Pb
 
6
Sb
 
6
S
 
14
(S
 
3
)
System:Orthorhombic
Name:For Dr. Y. Moëlo (Nantes, France), who first prepared this compound


A sulphosalt with a trisulphide anion

Classification of Moëloite

IMA status:Approved 1998
Nickel-Strunz 10th (pending) edition ID: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
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Type Occurrence of Moëloite

Type Locality:Seravezza Quarries, Seravezza, Apuan Alps, Lucca Province, Tuscany, Italy
General Appearance of Type Material:very thin needles and soft plumose aggregates of flexible thin fibres
Associated Minerals at type locality:
SulphurPyriteEnargite

Physical Properties of Moëloite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Density (calculated):5.86 g/cm3

Crystallography of Moëloite

Crystal System:Orthorhombic
Class (H-M):2 2 2 - Disphenoidal
Space Group:P21 21 2
Cell Parameters:a = 15.328Å, b = 4.04Å, c = 23.054Å
Ratio:a:b:c = 3.794 : 1 : 5.706
Unit Cell Volume:V 1427.6 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.724 (55)
3.427 (100)
3.047 (85)
2.844 (58)
2.779 (70)
2.753 (45)
2.017 (80)
1.733 (50)
Comments:Format: d/Å I (hkl)

Optical Data of Moëloite

Type:Anisotropic
Anisotropism:moderate
Reflectivity:
470 nmR1=40.0%R2=26.6%
546 nmR1=38.8%R2=24.9%
589 nmR1=38.6%R2=23.4%
650 nmR1=36.5%R2=21.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 40.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:white

Chemical Properties of Moëloite

Formula:
Pb
 
6
Sb
 
6
S
 
14
(S
 
3
)
All elements listed in formula:Pb, S, Sb

Relationship of Moëloite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HC.05bBaumhauerite-2a
Pb
 
11
Ag(As,Sb)
 
18
S
 
36
2.HC.05bBaumhauerite
Pb
 
3
As
 
4
S
 
9
2.HC.05eChabournéite
Tl
 
21-x
Pb
 
2x
(Sb,As)
 
91-x
S
 
147
 (x = 0-17.5)
2.HC.05dDufrénoysite
Pb
 
2
As
 
2
S
 
5
2.HC.05aGuettardite
Pb(Sb,As)
 
2
S
 
4
2.HC.05cLiveingite
Pb
 
9
As
 
13
S
 
28
2.HC.05fParapierrotite
Tl(Sb,As)
 
5
S
 
8
2.HC.05fPierrotite
Tl
 
2
Sb
 
6
As
 
4
S
 
16
2.HC.05dRathite
Pb
 
8
Pb
 
4-x
(Tl
 
2
As
 
2
)
 
x
(Ag
 
2
As
 
2
)As
 
16
S
 
40
2.HC.05aSartorite
PbAs
 
2
S
 
4
2.HC.05aTwinnite
Pb(Sb,As)
 
2
S
 
4
2.HC.05dVeenite
Pb
 
2
(Sb,As)
 
2
S
 
5
2.HC.05gMarumoite
Pb
 
32
As
 
40
S
 
92
2.HC.05eDalnegroite
(Tl
 
4
Pb
 
2
)(As
 
12
Sb
 
8
)S
 
34
2.HC.10aFülöppite
Pb
 
3
Sb
 
8
S
 
15
2.HC.10cHeteromorphite
Pb
 
7
Sb
 
8
S
 
19
2.HC.10bPlagionite
Pb
 
5
Sb
 
8
S
 
17
2.HC.10dRayite
Pb
 
8
(Ag,Tl)
 
2
Sb
 
8
S
 
21
2.HC.10dSemseyite
Pb
 
9
Sb
 
8
S
 
21
2.HC.15Boulangerite
Pb
 
5
Sb
 
4
S
 
11
2.HC.15Falkmanite
Pb
 
5.4
Sb
 
3.6
S
 
11
2.HC.15Plumosite
2.HC.20Robinsonite
Pb
 
4
Sb
 
6
S
 
13
2.HC.30Dadsonite
Pb
 
23
Sb
 
25
S
 
60
Cl
2.HC.35Owyheeite
Ag
 
3+x
Pb
 
10-2x
Sb
 
11+x
S
 
28
, -0.13 < x > +0.20
2.HC.35Zoubekite
AgPb
 
4
Sb
 
4
S
 
10
2.HC.40Parasterryite
Ag
 
4
Pb
 
20
Sb
 
14
As
 
10
S
 
58

Other Names for Moëloite

Synonyms:
IMA1998-045
Other Languages:
Russian:Моёлоит

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Moëloite

Reference List:

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

Internet Links for Moëloite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
  • Moëloite specimens for sale - minfind.com
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    • Localities for Moëloite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Seravezza
    		P. Orlandi et al.: Eur. J. Mineral., 14: 599-606 (2002); Orlandi, P. & Criscuolo, A. (2009). Minerali del marmo delle Alpi Apuane. Pacini editore, Pisa, 180 pp.
      • Massa-Carrara Province
        • Apuan Alps
    		Orlandi, P. & Criscuolo, A. (2009). Minerali del marmo delle Alpi Apuane. Pacini editore, Pisa, 180 pp.
    Favreau, G. (2008). Scoperta di moeloite alle cave di Valbona, Carrara. MICRO (notizie mineralogiche), 2008, 107-110
          • Massa
            • Casette
    		Orlandi, P. & Bellè, E. (2000): I minerali del marmo del bacino del Frigido, Massa. Comune della Città di Massa, Ed., 144 pp.
    Orlandi P., Bellé E., 2000. I minerali del marmo del bacino del Frigido, Massa. Comune della città di Massa; Orlandi, P. & Criscuolo, A. (2009). Minerali del marmo delle Alpi Apuane. Pacini editore, Pisa, 180 pp
    Switzerland
     
    • Wallis (Valais)
      • Sion (Sitten)
        • Granges (Lens)
    		Ansermet, S., Meisser, N. & Cuchet, S. (2011): Ein Hauch Carrara im Wallis - zur Mineralogie des Steinbruchs La Plâtrière in Lens. Schweizer Strahler 2/2011, 2-17 (in German/French).
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