Namuwite Mineral Data

Namuwite Mineral Data
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General Namuwite Information

Help on Chemical Formula: Chemical Formula: (Zn,Cu)4(SO4)(OH)6•4(H2O)
Help on Composition: Composition: Molecular Weight = 528.04 gm
   Zinc      24.77 %  Zn   30.83 % ZnO
   Copper    24.07 %  Cu   30.13 % CuO
   Hydrogen   2.67 %  H    23.88 % H2O
   Sulfur     6.07 %  S    15.16 % SO3
   Oxygen    42.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn2Cu2(SO4)(OH)6•4(H2O)
Help on Environment: Environment: Encrusting hydrozincite.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Averllyn lead mine, Llanrwst mining district, northern Wales. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the country of origin, and the National Museum of Wales.
Help on Name Pronunciation: Name Pronunciation: Namuwite Say NAMUWITE
Help on Synonym: Synonym: ICSD 81353
  PDF 35-528
 

Namuwite Image

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Namuwite

Comments: Sky-blue, platy crystals of namuwite on matrix.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Namuwite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.26658
Help on Cell Dimensions: Cell Dimensions: a = 8.29, c = 10.5, Z = 2; V = 624.93 Den(Calc)= 2.81
Help on Crystal System: Crystal System: HexagonalSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.59(1), 2.71(0.42), 2.63(0.41),
Click Here for Large Namuwite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
I - Data Info
A - Atoms On/Off
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B - Bonds On/Off
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Groat L A , American Mineralogist , 81 (1996) p.238-243, The crystal structure of namuwite, a mineral with Zn in tetrahedral and, octahedral coordination, and its relationship to the synthetic basic zinc, sulfates, Note: U(1,2) for S has been changed to match symmetry constraints.

 

Physical Properties of Namuwite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Light green, Pale sea green.
Help on Density: Density: 2.77
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: pale green
 

Optical Properties of Namuwite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2053,KPDmeas= 0.2083,KC= 0.208
Ncalc = 1.58
Help on Optical Data: Optical Data: Uniaxial (?), b=1.577.
 

Calculated Properties of Namuwite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Namuwite =2.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENamuwite = 22.77 barns/electron
U=PENamuwite x rElectron Density= 62.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Namuwite is Not Radioactive
 

Namuwite Classification
Help on Dana Class: Dana Class: 31.04.07.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.04)where (A+ B++)4 (XO4) Zq·x(H2O)
  (31.04.07)Dana Group
 
31.04.07.01 Namuwite (Zn,Cu)4(SO4)(OH)6•4(H2O) Unk Hex
Help on Strunz Class: Strunz Class: 07.DD.50 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.50 Namuwite (Zn,Cu)4(SO4)(OH)6•4(H2O) Unk Hex
 

Other Namuwite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Namuwite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Namuwite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Namuwite

(Zn,Cu)4(SO4)(OH)6•4(H2O)
Dana No: 31.04.07.01 Strunz No: 07.DD.50
Locality:

 

Notes: