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Dr. Gerhard Niedermayr in the field
Cu4Cd(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

Physical Properties of Niedermayrite

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

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

IMA Formula:
Cu4Cd(SO4)2(OH)6 · 4H2O
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)

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)

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.
Empirical Formula:
Cu4.29Cd0.96(SO4)2.01(OH)6.50 · 3.46H2O
Associated Minerals at Type Locality:

Relationship of Niedermayrite to other Species

Structurally related to group(s):
7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4SO4(OH)6 · 2H2O
7.DD.10PosnjakiteCu4SO4(OH)6 · H2O
7.DD.10WroewolfeiteCu4SO4(OH)6 · 2H2O
7.DD.15SpangoliteCu6AlSO4(OH)12Cl · 3H2O
7.DD.20Ktenasite(Cu,Zn)5(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteZn3Cu2(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteCu4Mn2+(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6 · 4H2O
7.DD.35Carrboydite(Ni1-xAlx)(SO4)x/2(OH)2 · nH2O (x<0.5, n>3x/2)
7.DD.35GlaucoceriniteZn1-xAlx(SO4)x/2(OH)2 · nH2O (x<0.5, n>3x/2)
7.DD.35Honessite(Ni1-xFex3+)(SO4)x/2(OH)2 · nH2O (x < 0.5, n < 3x/2)
7.DD.35Hydrohonessite(Ni1-xFex3+)(SO4)x/2(OH)2 · nH2O (x < 0.5, n > 3x/2)
7.DD.35Motukoreaite[Mg6Al3(OH)18][Na0.6(SO4,CO3)2 · 12H2O]
7.DD.35MountkeithiteMg11Fe33+(SO4)3.5(OH)24 · 11H2O
7.DD.35ShigaiteNaAl3Mn62+(SO4)2(OH)18 · 12H2O
7.DD.35WermlanditeMg8Al2(OH)18(SO4)2 · 12H2O
7.DD.35Woodwardite(Cu,Al)9(SO4)2(OH)18 · nH2O
7.DD.35Zincaluminite(Zn,Al)9(SO4)2(OH)18 · nH2O
7.DD.35Hydrowoodwardite(Cu1-xAlx)(SO4)x/2(OH)2 · nH2O (x < 0.5, n > 3x/2)
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2(SO4)x/2 · nH2O (x=0.32-0.50)
7.DD.40LawsonbaueriteMn92+Zn4(SO4)2(OH)22 · 8H2O
7.DD.40TorreyiteMg9Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg15(SO4)2(OH)26 · 8H2O
7.DD.50NamuwiteZn4SO4(OH)6 · 4H2O
7.DD.60RamsbeckiteCu15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6SO4(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4SO4(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.75KyrgyzstaniteZnAl4SO4(OH)12 · 3H2O
7.DD.80GuarinoiteZn6SO4(OH)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2O
7.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl · 6H2O
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 URL:
Please feel free to link to this page.

Localities for Niedermayrite

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.
  • 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
Joy Desor specimen. EDS analyzed.
  • 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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