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Voudourisite

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Professor Dr. Panagiotis Voudouris
Formula:
CdSO4·H2O
Colour:
colorless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.80
Crystal System:
Monoclinic
Name:
The name is in honour of Professor Panagiotis Voudouris (b. 1962), Department of Mineralogy and Petrology, Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, in recognition of his ground-breaking work on the Lavrion deposits.
Voudourisite is related to the kieserite group of minerals. It is the lower hydrate counterpart of drobecite, but higher one when compared to lazaridisite. Compare also Unnamed (Cd sulfate).

The mineral formed through the oxidation of Pb-Zn ores (galena, sphalerite), and includes an assemblage of secondary Cd minerals. It was found at the type locality for niedermayrite.


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Classification of VoudourisiteHide

Approved
Approval Year:
2012

Physical Properties of VoudourisiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
colorless
Streak:
white
Hardness:
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
None observed
Density:
3.80(5) g/cm3 (Measured)    3.693 g/cm3 (Calculated)

Optical Data of VoudourisiteHide

Type:
Biaxial (-)
RI values:
nα = 1.580(5) nβ = 1.624(5) nγ = 1.640(5)
2V:
Measured: 70° , Calculated: 61°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
n.o.
Pleochroism:
Non-pleochroic

Chemical Properties of VoudourisiteHide

Formula:
CdSO4·H2O
IMA Formula:
Cd(SO4) · H2O
Common Impurities:
Cu,Fe,Mg

Crystallography of VoudourisiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 7.633(1) Å, b = 7.458(1) Å, c = 6.623(1) Å
β = 115.41(1)°
Ratio:
a:b:c = 1.023 : 1 : 0.888
Unit Cell V:
391.97 ų
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.460 (3)
5.066 (10)
4.881 (65)
4.075 (2)
3.729 (26)
3.574 (100)
3.448 (3)
3.388 (5)
3.279 (14)
3.226 (44)
3.128 (13)
2.961 (4)
2.753 (3)
2.663 (1)
2.531 (32)
2.504 (1)
2.440 (8)
2.397 (29)
2.319 (16)
2.166 (2)
2.150 (2)
2.122 (13)
2.091 (6)
2.066 (10)
2.038 (5)
2.015 (3)
1.964 (4)
1.943 (3)
1.900 (4)
1.879 (5)
1.863 (4)
1.842 (6)
1.814 (1)
1.787 (5)
1.772 (6)
1.722 (5)
1.693 (6)
1.676 (3)
1.640 (6)
1.625 (6)
1.612 (2)
1.575 (2)
1.563 (5)

Type Occurrence of VoudourisiteHide

General Appearance of Type Material:
Glassy colourless grains on open surfaces
Place of Conservation of Type Material:
Type material is deposited in the collections of the Institut für Mineralogie und Kristallographie, University of Vienna, Althanstraße 14, 1090 Wien, Austria, catalogue number HS13.077.

Synonyms of VoudourisiteHide

Relationship of Voudourisite to other SpeciesHide

Structurally related to group(s):
Kieserite GroupM2+SO4 · H2O

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 VoudourisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bregeault, J.M. and Herpin, P. (1970) Crystal structure of CdSO4.H2O. Bull. Soc. franç. Minéral. Cristallogr. 93, 37-42 (in French).
Sejkora, J. and Kotrlý, M. (1998) A new cadmium sulfate natural phase from Radvanice near Trutnov (Czech Republic). Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.). 73, 321-326.
Rieck, B. and Giester, G. (2012) Voudourisite, IMA 2012-042. CNMNC Newsletter No. 14, October 2012, page 1287; Mineralogical Magazine, 76, 1281-1288.
Chatphorn Theppitak and Kittipong Chainok (2015) Crystal structure of CdSO4(H2O): a redetermination. Acta Crystallographica E71, i8-i9.

Internet Links for VoudourisiteHide

Localities for VoudourisiteHide

ⓘ - 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.
Czech Republic
 
  • Hradec Králové Region
    • Trutnov (Trautenau)
      • Radvanice
Sejkora, J. & Kotrlý, M. (1998): A new cadmium sulfate natural phase from Radvanice near Trutnov (Czech Republic). Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.). 73, 321-326.
Greece (TL)
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
      • Lavrion District Mines
        • Lavrion (Laurion; Laurium)
Rieck, B. and Giester, G. (2012) Voudourisite, IMA 2012-042. CNMNC Newsletter No. 14, October 2012, page 1287; Mineralogical Magazine, 76, 1281-1288; Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).
        • Sounion area
          • Sounion Mines
Branko Rieck (2012) Neue Minerale aus dem Lagerstätten-Bezirk Lavrion/Griechenland und den Kalahari Mangan Feldern/Republik Südafrika. PhD Thesis (unpubl.) 183pp. (in German)
Mineral and/or Locality  
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