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Viaeneite

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About ViaeneiteHide

Willy Viaene (1940-2000)
Formula:
(Fe,Pb)4S8O
Colour:
Yellow
Lustre:
Metallic
Hardness:
3½ - 4½
Crystal System:
Monoclinic
Name:
Named after Professor Willy A. Viaene (born 22 January 1940 in Staden, Belgium - died 13 March 2000), Katholieke Universiteit Leuven, Belgium.
An unusual species characterised by mixed sulphur valencies. Many similar (intermediate/mixed-valence) species, usually Fe-dominant, are known from carbonate-hosted Zn-Pb deposits; compare especially 'UM1995-35-SO:FePb'; Unnamed (Fe Pyrosulphite), Unnamed (Fe Sulphoxylane), Unnamed (Fe Sulphite), Unnamed (Fe Subsulphite); thiosulphates: UM1995-34-SO:Fe and Unnamed (Fe Thiosulphate II). Compare also Unnamed (Fe Oxysulphide).

When viaeneite is exposed to air it tarnishes within a few weeks.

Compare also albertiniite - another mineral with untypical S valence.


Classification of ViaeneiteHide

Approved
Approval Year:
1993
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 ed.:
2.3.4.1

Physical Properties of ViaeneiteHide

Metallic
Transparency:
Opaque
Colour:
Yellow
Hardness:
3½ - 4½ on Mohs scale

Chemical Properties of ViaeneiteHide

Formula:
(Fe,Pb)4S8O

Crystallography of ViaeneiteHide

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 V:
462.22 ų (Calculated from Unit Cell)
Comment:
Probable primitive.

Type Occurrence of ViaeneiteHide

Synonyms of ViaeneiteHide

Other Language Names for ViaeneiteHide

German:Viaeneit
Spanish:Viaeneita

Related Minerals - Nickel-Strunz GroupingHide

2.FD.UKI-2004-(OS:BiCuPb)PbCu4Bi4S2O16 (?)Tet.
2.FD.05KermesiteSb2S2OTric. 1 : P1
2.FD.20ErditeNaFeS2 · 2H2OMon. 2/m : B2/b
2.FD.25CoyoteiteNaFe3S5 · 2H2OTric.
2.FD.30Haapalaite(Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22Hex.
2.FD.30Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6Hex.
2.FD.30Yushkinite(Mg,Al)V4+S2(OH)2Hex.
2.FD.35TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
2.FD.40WilhelmramsayiteCu3FeS3·2H2OOrth. mmm (2/m 2/m 2/m) : Pmmm
2.FD.45VyalsoviteFeCaAlS(OH)5Orth.
2.FD.50BazhenoviteCa8S2(S3)(S2O3)(OH)12 · 20H2OMon. 2/m : P21/b

Other InformationHide

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

References for ViaeneiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 ViaeneiteHide

Localities for ViaeneiteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Belgium (TL)
 
  • Liège Province
    • Engis
European Journal of Mineralogy(1996) 8, 93-102
Mineral and/or Locality  
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