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Lazaridisite

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Stathis Lazaridhis (1953-2010)
Formula:
3CdSO4·8H2O
System:
Monoclinic
Colour:
colorless
Lustre:
Vitreous
Hardness:
3
Name:
The mineral is named after Stathis Lazaridis (1953-2010), a mineral collector from Lavrion, who has contributed significantly to the understanding of the paragenetic sequences at the Lavrion deposits.
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.

This is the lowest hydrate of cadmium sulfate currently known to exist in nature; the higher hydrates are voudourisite and drobecite. Compare also Unnamed (Cd sulfate).


Classification of Lazaridisite

Approved
Approval Year:
2012

Physical Properties of Lazaridisite

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
colorless
Streak:
white
Hardness (Mohs):
3
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.10(5) g/cm3 (Measured)    3.005 g/cm3 (Calculated)

Optical Data of Lazaridisite

Type:
Biaxial (-)
RI values:
nα = 1.552(5) nβ = 1.561(5) nγ = 1.570(5)
2V:
Measured: 90° , Calculated: 90°
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
n.o.
Pleochroism:
Non-pleochroic

Chemical Properties of Lazaridisite

Formula:
3CdSO4·8H2O
IMA Formula:
(CdSO4)3 · 8H2O
Elements listed in formula:
Analytical Data:
CdO (44.45)
SO3 (31.98)
CuO (3.02)
FeO (1.19)
MgO (0.16)
H2O (19.26)

Crystallography of Lazaridisite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Space Group Setting:
C2/c
Cell Parameters:
a = 14.813(3) Å, b = 11.902(2) Å, c = 9.466(2) Å
β = 97.38(3)°
Ratio:
a:b:c = 1.245 : 1 : 0.795
Unit Cell Volume:
V 1655.1 ų
Z:
4
X-Ray Powder Diffraction Data:
d-spacingIntensity
7.346 (15)
6.874 (100)
6.338 (69)
5.953 (75)
5.027 (13)
4.695 (7)
4.624 (12)
4.529 (57)
4.330 (34)
4.283 (31)
4.209 (5)
4.056 (6)
4.022 (29)
3.745 (72)
3.673 (7)
3.589 (75)
3.507 (34)
3.472 (5)
3.437 (16)
3.169 (36)
3.126 (10)
3.092 (75)
3.068 (18)
3.003 (51)
2.977 (10)
2.895 (42)
2.831 (10)
2.758 (19)
2.744 (16)
2.732 (7)
2.729 (17)
2.640 (10)
2.613 (20)
2.514 (8)
2.501 (3)
2.481 (6)
2.450 (3)
2.431 (7)
2.386 (25)
2.348 (5)
2.348 (9)
2.331 (8)
2.326 (7)
2.315 (9)
2.290 (8)
2.266 (13)
2.264 (9)
2.238 (21)
2.234 (8)
2.194 (4)
2.165 (8)
2.142 (10)
2.121 (9)
2.119 (6)
2.101 (21)
1.990 (13)
1.988 (21)
1.987 (14)
1.984 (10)
1.891 (10)
1.813 (8)
1.793 (8)
1.791 (5)
1.754 (5)
1.747 (9)
1.698 (9)
1.690 (9)
1.670 (5)
1.666 (10)
1.659 (10)
1.619 (5)
1.618 (5)
1.596 (4)

Type Occurrence of Lazaridisite

General Appearance of Type Material:
Vitreous 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:
3(Cd0.86Cu0.09Fe0.04Mg0.01)Σ1.00S1.00O4·8H2O

Other Names for Lazaridisite

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 Lazaridisite

Reference List:
Rieck, B. and Giester, G. (2012) Lazaridisite, IMA 2012-043. CNMNC Newsletter No. 14, October 2012, page 1287; Mineralogical Magazine, 76, 1281-1288.

Internet Links for Lazaridisite

mindat.org URL:
https://www.mindat.org/min-43257.html
Please feel free to link to this page.

Localities for Lazaridisite

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.
Greece (TL)
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Lavrion (Laurion; Laurium)
Rieck, B. and Giester, G. (2012) Lazaridisite, IMA 2012-043. 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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