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Drobecite

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Erich Drobec
Formula:
CdSO4 · 4H2O
System:
Monoclinic
Colour:
Colourless to light blue
Lustre:
Vitreous
Name:
Named after the mineral collector Obermedizinalrat Dr. med. Dr. phil. Erich Drobec who was born on 25 February 1919 in Vienna and died on 2 November 2004. He received his doctor's degree in medicine in 1942 and in ethnology in 1950. In the late 1950s he was a pioneer in ethnic medicine and published several ground-breaking papers. He was a serious mineral collector specialising in systematic mineralogy. His collection is now on public display.
The higher hydrate counterpart of voudourisite and lazaridisite. Compare also Unnamed (Cd sulfate).


Classification of Drobecite

Approved
Approval Year:
2002
7.CB.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations

Physical Properties of Drobecite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless to light blue

Optical Data of Drobecite

Type:
Uniaxial (-)
RI values:
nα = 1.430 nβ = 1.454 nγ = 1.470
2V:
Measured: 70° , Calculated: 77°
Max Birefringence:
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Drobecite

Formula:
CdSO4 · 4H2O
Elements listed in formula:

Crystallography of Drobecite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 6.5859 Å, b = 14.329 Å, c = 8.5712 Å
β = 91.51°
Ratio:
a:b:c = 0.46 : 1 : 0.598
Unit Cell Volume:
V 808.58 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.98(85)
4.84(70)
3.146(85)
2.967(85)
2.708(75)
2.654(100)
Comments:
From Type Description.

Type Occurrence of Drobecite

Relationship of Drobecite to other Species

7.CB.05Dwornikite(Ni,Fe)SO4 · H2O
7.CB.05GunningiteZnSO4 · H2O
7.CB.05KieseriteMgSO4 · H2O
7.CB.05Poitevinite(Cu,Fe,Zn)SO4 · H2O
7.CB.05SzmikiteMnSO4 · H2O
7.CB.05SzomolnokiteFeSO4 · H2O
7.CB.05CobaltkieseriteCoSO4 · H2O
7.CB.07SanderiteMgSO4 · 2H2O
7.CB.10BonattiteCuSO4 · 3H2O
7.CB.15Aplowite(Co,Mn,Ni)SO4 · 4H2O
7.CB.15Boyleite(Zn,Mg)SO4 · 4H2O
7.CB.15Ilesite(Mn,Zn,Fe)SO4 · 4H2O
7.CB.15RozeniteFeSO4 · 4H2O
7.CB.15StarkeyiteMgSO4 · 4H2O
7.CB.15CranswickiteMgSO4 · 4H2O
7.CB.20ChalcanthiteCuSO4 · 5H2O
7.CB.20JôkokuiteMnSO4 · 5H2O
7.CB.20PentahydriteMgSO4 · 5H2O
7.CB.20SiderotilFeSO4 · 5H2O
7.CB.25Bianchite(Zn,Fe)SO4 · 6H2O
7.CB.25Chvaleticeite(Mn,Mg)SO4 · 6H2O
7.CB.25FerrohexahydriteFeSO4 · 6H2O
7.CB.25HexahydriteMgSO4 · 6H2O
7.CB.25Moorhouseite(Co,Ni,Mn)SO4 · 6H2O
7.CB.25Nickelhexahydrite(Ni,Mg,Fe)SO4 · 6H2O
7.CB.30RetgersiteNiSO4 · 6H2O
7.CB.35BieberiteCoSO4 · 7H2O
7.CB.35BoothiteCuSO4 · 7H2O
7.CB.35MallarditeMnSO4 · 7H2O
7.CB.35MelanteriteFeSO4 · 7H2O
7.CB.35Zincmelanterite(Zn,Cu,Fe)SO4 · 7H2O
7.CB.35Alpersite(Mg,Cu)[SO4] · 7H2O
7.CB.40EpsomiteMgSO4 · 7H2O
7.CB.40GoslariteZnSO4 · 7H2O
7.CB.40MorenositeNiSO4 · 7H2O
7.CB.45AlunogenAl2(SO4)3 · 17H2O
7.CB.45Meta-alunogenAl2(SO4)3 · 12H2O
7.CB.50AluminocoquimbiteFeAl(SO4)3 · 9H2O
7.CB.55CoquimbiteFe2-xAlx(SO4)3 · 9H2O, x ~0.5
7.CB.55ParacoquimbiteFe2(SO4)3 · 9H2O
7.CB.55Rhomboclase(H5O2)Fe3+(SO4)2 · 2H2O
7.CB.60KorneliteFe2(SO4)3 · 7H2O
7.CB.65QuenstedtiteFe2(SO4)3 · 11H2O
7.CB.70LauseniteFe2(SO4)3·5H2O
7.CB.75LishizheniteZnFe2(SO4)4 · 14H2O
7.CB.75RömeriteFe2+Fe23+(SO4)4 · 14H2O
7.CB.80RansomiteCuFe2(SO4)4 · 6H2O
7.CB.85ApjohniteMn2+Al2(SO4)4 · 22H2O
7.CB.85BíliniteFe2+Fe23+(SO4)4 · 22H2O
7.CB.85Dietrichite(Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2O
7.CB.85HalotrichiteFeAl2(SO4)4 · 22H2O
7.CB.85PickeringiteMgAl2(SO4)4 · 22H2O
7.CB.85Redingtonite(Fe2+,Mg,Ni)(Cr,Al)2(SO4)4·22H2O
7.CB.85Wupatkiite(Co,Mg,Ni)Al2(SO4)4·22H2O
7.CB.90MeridianiiteMgSO4 · 11H2O

Other Names for Drobecite

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 Drobecite

Reference List:
Giester, G. & Rieck, B. (2010): Drobecite, a novel mineral from the Lavrion, Greece, deposit. 20th General Meeting of IMA (IMA2010) August 21 – 27, 2010, Budapest, Hungary (poster).

Internet Links for Drobecite

mindat.org URL:
https://www.mindat.org/min-26376.html
Please feel free to link to this page.

Localities for Drobecite

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)
Giester, G. & Rieck, B. (2010): Drobecite, a novel mineral from the Lavrion, Greece, deposit. 20th General Meeting of IMA (IMA2010) August 21 – 27, 2010, Budapest, Hungary (poster).
Mineral and/or Locality  
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