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Voudourisite

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Professor Dr. Panagiotis Voudouris
Formula:
CdSO4·H2O
System:
Monoclinic
Colour:
colorless
Lustre:
Vitreous
Hardness:
3
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.


Classification of Voudourisite

Approved
Approval Year:
2012

Physical Properties of Voudourisite

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
colorless
Streak:
white
Hardness (Mohs):
3
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 Voudourisite

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 Voudourisite

Formula:
CdSO4·H2O
IMA Formula:
CdSO4 · H2O
Elements listed in formula:
Analytical Data:
CdO (47.91)
SO3 (36.43)
CuO (5.98)
FeO (1.27)
MgO (0.22)
H2O (8.28)
Common Impurities:
Cu,Fe,Mg

Crystallography of Voudourisite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Space Group 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 Volume:
V 391.97 ų
Z:
4
X-Ray 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 Voudourisite

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.
Empirical Formula:
(Cd0.81Cu0.16Fe0.04Mg0.01)Σ1.02S0.99O4·H2O

Relationship of Voudourisite to other Species

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

Other Names for Voudourisite

Name in Other Languages:

Other Information

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 Voudourisite

Reference List:
Bregeault, J. M. & Herpin, P. (1970): Crystal structure of CdSO4.H2O. Bull. Soc. franç. Minéral. Cristallogr. 93, 37-42 (in French).

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.

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 Voudourisite

mindat.org URL:
https://www.mindat.org/min-43255.html
Please feel free to link to this page.

Localities for Voudourisite

This 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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • 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)
      • 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.
        • 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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