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Viaeneite

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La Mallieue, Engis, Liège Province, Belgium




Formula:
(Fe,Pb)
 
4
S
 
8
O
System:MonoclinicColour:Yellow
Lustre:MetallicHardness:3½ - 4½
Name:
Named after Professor Willy A. Viaene (1940-2000), Katholieke Universiteit Leuven, Belgium


An unusual species characterised by mixed sulphur valencies.
When viaeneite is exposed to air it tarnishes within a few weeks.

Classification of Viaeneite

IMA status:Approved 1993
Strunz 8th edition ID:2/F.12-05
Nickel-Strunz 10th (pending) edition ID:2.FD.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
D : With O, OH, H2O
Dana 7th edition ID:2.3.4.1
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Type Occurrence of Viaeneite

Type Locality:La Mallieue, Engis, Liège Province, Belgium

Physical Properties of Viaeneite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Yellow
Hardness (Mohs):3½ - 4½

Crystallography of Viaeneite

Crystal System:Monoclinic
Cell Parameters:a = 9.717 (8) Å, b = 7.280 (6) Å, c = 6.559 (7) Å
β = 95.00(3)°
Ratio:a:b:c = 1.335 : 1 : 0.901
Unit Cell Volume:V 462.22 ų (Calculated from Unit Cell)
Comment:Probable primitive.

Chemical Properties of Viaeneite

Formula:
(Fe,Pb)
 
4
S
 
8
O
Essential elements:Fe, O, S
All elements listed in formula:Fe, O, Pb, S

Relationship of Viaeneite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FD.UKI-2004-(OS:BiCuPb)
PbCu
 
4
Bi
 
4
S
 
2
O
 
16
 (?)
2.FD.05Kermesite
Sb
 
2
S
 
2
O
2.FD.20Erdite
NaFeS
 
2
 · 2H
 
2
O
2.FD.25Coyoteite
NaFe
 
3
S
 
5
 · 2H
 
2
O
2.FD.30Haapalaite
(Fe
2+
 
,Ni)
 
2
(Mg,Fe
2+
 
)
 
1.61
S
 
2
(OH)
 
3.22
2.FD.30Valleriite
(Fe
2+
 
,Cu)
 
4
(Mg,Al)
 
3
S
 
4
(OH,O)
 
6
2.FD.30Yushkinite
(Mg,Al)V
4+
 
S
 
2
(OH)
 
2
2.FD.35Tochilinite
Fe
2+
5-6
(Mg,Fe
2+
 
)
 
5
S
 
6
(OH)
 
10
2.FD.40Wilhelmramsayite
Cu
 
3
FeS
 
3
·2H
 
2
O
2.FD.45Vyalsovite
FeCaAlS(OH)
 
5
2.FD.50Bazhenovite
Ca
 
8
S
 
2
(S
 
3
)(S
 
2
O
 
3
)(OH)
 
12
 · 20H
 
2
O

Other Names for Viaeneite

Synonyms:
IMA1993-051
Other Languages:
German:Viaeneit
Spanish:Viaeneita

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 Viaeneite

Reference List:

- +
Kucha, H., Osuch, W. & Elsen, J. (1995): Calculation and refinement of cell parameters of viaeneite from electron diffraction patterns. N. Jb. Mineral. Mh., 1995, 433-443.

Mineralogical Record: 28: 224.

Kucha, H., Osuch, W. & Elsen, J. (1996): Viaeneite, (Fe,Pb)4S8O, a new mineral with mixed sulphur valencies from Engis, Belgium. European Journal of Mineralogy, 8, 93-102.

Internet Links for Viaeneite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Viaeneite details from Handbook of Mineralogy (PDF)
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    • Localities for Viaeneite

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    (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.
    Belgium
     
    • Liège Province
      • Engis
    		Eur.J.Min.(1996) 8, 93-102
    Mineral and/or Locality
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