Niedermayrite Mineral Data

General Niedermayrite Information

Chemical Formula:

Cu4Cd(SO4)2(OH)6•4(H2O)

Composition:

Molecular Weight = 732.83 gm

Cadmium 15.34 % Cd 17.52 % CdO

Copper 34.69 % Cu 43.42 % CuO

Hydrogen 1.93 % H 17.21 % H₂O

Sulfur 8.75 % S 21.85 % SO₃

Oxygen 39.30 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₄Cd(SO₄)₂(OH)₆•4(H₂O)

Environment:

In brecciated marble. The cadmium dominant analogue of campigliaite.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

An abandoned adit in the Km3 area, Lavrion mining district, Attica peninsula, Greece. Link to MinDat.org Location Data.

Name Origin:

Named after Gerhard Niedermayr (b. 1941), mineralogist and geologist, Naturhistorisches Museum, Vienna, Austria, compiler of the regional mineralogy of the eastern Alps.

Name Pronunciation:

Niedermayrite + Pronunciation

Synonym:

IMA1997-024

Niedermayrite Crystallography

Axial Ratios:

a:b:c =0.252:1:0.2763

Cell Dimensions:

a = 5.543, b = 21.995, c = 6.079, Z = 2; beta = 92.033° V = 740.67 Den(Calc)= 3.29

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.496(1), 11.02(0.9), 4.079(0.5),

Physical Properties of Niedermayrite

Cleavage:

{010} Perfect

Color:

Bluish green.

Density:

3.36

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Niedermayrite

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1937,KPDmeas= 0.1897,KC= 0.1938
Ncalc = 1.64 - 1.65

Optical Data:

Biaxial (-), a=1.599-1.619, b=1.642, g=1.661, bire=0.0420-0.0620, 2V(Calc)=64-82, 2V(Meas)=84. Dispersion r > v strong.

Calculated Properties of Niedermayrite

Electron Density:

Bulk Density (Electron Density)=3.18 gm/cc
note: Specific Gravity of Niedermayrite =3.29 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Niedermayrite}= 53.99 barns/electron
U=PE_{Niedermayrite} x rElectron Density= 171.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Niedermayrite is Not Radioactive

Niedermayrite Classification

Dana Class:

31.06.06.02 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.06)where (A+ B++)5 (XO4)2 Zqï¿½x(H2O)

(31.06.06)Dana Group

31.06.06.01 Campigliaite Cu4Mn(SO4)2(OH)6•4(H2O) C 2 2

31.06.06.02 Niedermayrite! Cu4Cd(SO4)2(OH)6•4(H2O) P 2₁/m 2/m

Strunz Class:

07.DD.30 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DD -With only medium-sized cations; sheets of edge-sharing octahedra

07.DD.30 Campigliaite Cu4Mn(SO4)2(OH)6•4(H2O) C 2 2

07.DD.30 Devilline CaCu4(SO4)2(OH)6•3(H2O) P 2₁/c 2/m

07.DD.30 Orthoserpierite Ca(Cu,Zn)4(SO4)2(OH)6•3(H2O) P ca2₁ mm2

07.DD.30 Niedermayrite! Cu4Cd(SO4)2(OH)6•4(H2O) P 2₁/m 2/m

07.DD.30 Serpierite Ca(Cu,Zn)4(SO4)2(OH)6•3(H2O) C 2/c 2/m

Other Niedermayrite Information

References:

NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.10,1998) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Niedermayrite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Niedermayrite Specimen Label here :

Niedermayrite

Cu4Cd(SO4)2(OH)6•4(H2O)
Dana No: 31.06.06.02 Strunz No: 07.DD.30
Locality:

Notes:

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