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Lazaridisite

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Stathis Lazaridhis (1953-2010)
Formula:
3CdSO4·8H2O
Colour:
colorless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.10
Crystal System:
Monoclinic
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).


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Classification of LazaridisiteHide

Approved
Approval Year:
2012

Physical Properties of LazaridisiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
colorless
Streak:
white
Hardness:
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 LazaridisiteHide

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 LazaridisiteHide

Formula:
3CdSO4·8H2O
IMA Formula:
(CdSO4)3 · 8H2O

Crystallography of LazaridisiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
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 V:
1655.1 ų
Z:
4

X-Ray Powder DiffractionHide

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 LazaridisiteHide

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.

Synonyms of LazaridisiteHide

Other Language Names for LazaridisiteHide

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 LazaridisiteHide

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

Localities for LazaridisiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
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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