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Dr. Gerhard Niedermayr in the field
CdCu4(SO4)2(OH)6 · 4H2O
Bluish green, pale bluish
Named after HR Dr Gerhard Niedermayr (16 June 1941 - 17 July 2015), mineralogist and geologist, Naturhistorisches Museum, Vienna, Austria, compiler of the regional mineralogy of the eastern Alps. Known for his extensive work on Alpine-type minerals, the mineralogy of Carinthia, quartz and gemstones.
Structurally related to christelite and campigliaite.

Classification of Niedermayrite


7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra URL:
Please feel free to link to this page.

Type Occurrence of Niedermayrite

General Appearance of Type Material:
Tiny euhedral plates, commonly intergrown as green crusts up to several cm2 in size.
Place of Conservation of Type Material:
Institute of Mineralogy and Crystallography, University of Vienna, Vienna and Department of Mineralogy and Petrography, Natural History Museum, Vienna, Austria.
Associated Minerals at Type Locality:

Physical Properties of Niedermayrite

Bluish green, pale bluish
Hardness Data:
Could not be measured
on {010}
3.292 g/cm3 (Calculated)

Crystallography of Niedermayrite

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Space Group Setting:
Cell Parameters:
a = 5.543(1) Å, b = 21.995(4) Å, c = 6.079(1) Å
β = 92.04(3)°
a:b:c = 0.252 : 1 : 0.276
Unit Cell Volume:
V 740.7 ų
The predominant crystal form is {010}, additional forms are {100}, {001} as well as unindexed prisms.
No clear twinning was observed.
X-Ray Powder Diffraction Data:
11.02 (90)
5.874 (20)
5.496 (100)
5.322 (25)
4.079 (50)
3.660 (20)
3.437 (30)
3.243 (40)
2.470 (30)
2.425 (20)
2.205 (20)
1.897 (20)

Optical Data of Niedermayrite

Biaxial (-)
RI values:
nα = 1.599 - 1.619 nβ = 1.642 nγ = 1.661
Measured: 84° , Calculated: 64° to 82°
Max Birefringence:
δ = 0.062
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r > v strong

Chemical Properties of Niedermayrite

CdCu4(SO4)2(OH)6 · 4H2O
Essential elements:
All elements listed in formula:
Analytical Data:
Average of 7 electron-microprobe analyses; water content calculated by difference to 100%. Sample from the type locality.
CdO (16.5)
CuO (45.7)
ZnO (<0.1)
MnO (<0.1)
SO3 (21.6)
H2O (16.2)
Total (100.0)
Empirical Formula:
Cu4.29Cd0.96(SO4)2.01(OH)6.50 · 3.46H2O

Relationship of Niedermayrite to other Species

Structurally related to group(s):
7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2O
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2O
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
7.DD.20KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.35Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2O
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
7.DD.35Honessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35Hydrohonessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35Mountkeithite[(Mg1-xFex3+)(OH)2][SO4]x/2 · nH2O
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
7.DD.35WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35NikischeriteFe62+Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
7.DD.40Torreyite(Mg,Mn2+)72Mn22+Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
7.DD.50Namuwite(Zn,Cu)4(SO4)(OH)6 · 4H2O
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.80Guarinoite(Zn,Co,Ni)6(SO4)(OH,Cl)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.80Thérèsemagnanite(Co,Zn,Ni)6(SO4)(OH,Cl)10 · 8H2O
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2O

Other Names for Niedermayrite

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 Niedermayrite

Reference List:
Giester, G., Rieck, B. and Brandstätter, F. (1998): Niedermayrite, Cu4Cd(SO4)2(OH)6•4H2O, a new mineral from the Lavrion Mining District, Greece. Mineralogy and Petrology: 63: 19-34.

Internet Links for Niedermayrite

Localities for Niedermayrite

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.
  • New South Wales
    • Yancowinna Co.
      • Broken Hill
Peter Elliot pers. comm.
  • La Paz Department
    • Aroma Province
EDS analysis by Joy Desor,,11,359266,359548#msg-359548
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
Fritz Schreiber Collection
        • Lavrion (Laurion; Laurium)
Giester, G., Rieck, B. and Brandstätter, F. (1998): Niedermayrite, Cu4Cd(SO4)2(OH)6•4H2O, a new mineral from the Lavrion Mining District, Greece. Mineral. Petrol., 63, 19-34.; Hanke, H. & Jahn, S. (1998): Niedermayrit. Mineralien-Welt, 9 (5), 12; Hanke, H. (1998): Niedermayrit, Cu4Cd(SO4)2(OH)6•4H2O, ein neues Mineral aus dem Bergbaugebiet Laurion, Griechenland. Mineralien-Welt, 9 (5), 13.
        • Plaka
          • Villia
Lapis, 28/5 (May 2003)
        • Sounion area
          • Sounion Mines
Branko Rieck collection
  • Utah
    • Tooele Co.
      • Oquirrh Mts
        • Ophir District
          • Ophir Hill area
Twenty-seventh Annual New Mexico Mineral Sympsium (2006) abs.; Rocks & Minerals 83:1 pp 52-62
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