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Namuwite

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Big Photo

Serpieri Mine, Kamariza Mines (Kamareza Mines), Agios Konstantinos [St Constantine] (Kamariza), Lavrion District Mines, Lavrion District (Laurion; Laurium), Attikí Prefecture (Attica; Attika), Greece
© Brent thorne

Show Namuwite Photos (40)



Formula:
(Zn,Cu)
 
4
(SO
 
4
)(OH)
 
6
 · 4H
 
2
O
Measured Zn:Cu ratios in samples from different localities: 2.5:1.5; 2.3:1.7; 3.3:0.8.
System:TrigonalColour:Sea green
Lustre:PearlyHardness:2
Name:
An acronym for the NAtional MUseum of Wales.


Compare the closely related (but Cu-free) Unnamed (Basic Zinc Sulphate Hydrate).

Note: Well-developed, tabular "Namuwite" crystals from some slag localities in the Hartz mountains, Germany, are in fact Unnamed (Gordaite-related Ca-Zn Sulphate Chloride Hydrate) (U. Kolitsch, unpubl. data).

May appear visually similar to schulenbergite and minohlite.

Classification of Namuwite

IMA status:Approved
Strunz 8th edition ID:6/D.03-40
Nickel-Strunz 10th (pending) edition ID:7.DD.50

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
Dana 8th edition ID:31.4.7.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
4 : (AB)4(XO4)Zq·xH2O
Hey's CIM Ref.:25.5.3

25 : Sulphates
5 : Sulphates of Zn and Hg
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Type Occurrence of Namuwite

Type Locality:Aberllyn Mine, Betws-y-coed, Gwydyr Forest area, Conwy (Gwynedd; Caernarvonshire), Wales, UK
Year of Discovery:1982

Physical Properties of Namuwite

Lustre:Pearly
Colour:Sea green
Streak:Pale green
Hardness (Mohs):2
Cleavage:Perfect
(0001)
Density (measured):2.77 g/cm3
Density (calculated):2.81 g/cm3

Crystallography of Namuwite

Crystal System:Trigonal
Class (H-M):3 - Rhombohedral
Space Group:P3
Cell Parameters:a = 8.330(1) Å, c = 10.540(2) Å
Ratio:a:c = 1 : 1.265
Unit Cell Volume:V 633.38 ų (Calculated from Unit Cell)
Z:2
Morphology:60 micron hexagonal plates.
X-Ray Powder Diffraction:
d-spacingIntensity
10.59 (100)
4.15 (25)
2.71 (42)
2.63 (41)
2.41 (22)
1.57 (23)
1.55 (20)

Optical Data of Namuwite

Type:Uniaxial
Comments:Crystal form did not allow for accurate measure of refractive index of extraordinary ray.

Chemical Properties of Namuwite

Formula:
(Zn,Cu)
 
4
(SO
 
4
)(OH)
 
6
 · 4H
 
2
O


Measured Zn:Cu ratios in samples from different localities: 2.5:1.5; 2.3:1.7; 3.3:0.8.
Essential elements:H, O, S, Zn
All elements listed in formula:Cu, H, O, S, Zn

Relationship of Namuwite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DD.05Felsőbányaite
Al
 
4
(SO
 
4
)(OH)
 
10
 · 4H
 
2
O
7.DD.10Langite
Cu
 
4
(SO
 
4
)(OH)
 
6
 · 2H
 
2
O
7.DD.10Posnjakite
Cu
 
4
(SO
 
4
)(OH)
 
6
 · H
 
2
O
7.DD.10Wroewolfeite
Cu
 
4
(SO
 
4
)(OH)
 
6
 · 2H
 
2
O
7.DD.15Spangolite
Cu
 
6
Al(SO
 
4
)(OH)
 
12
Cl · 3H
 
2
O
7.DD.20Ktenasite
Zn(Cu,Zn)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 6H
 
2
O
7.DD.25Christelite
Cu
 
2
Zn
 
3
(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
7.DD.30Campigliaite
Mn
2+
 
Cu
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
7.DD.30Devilline
CaCu
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DD.30Orthoserpierite
Ca(Cu,Zn)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DD.30Serpierite
Ca(Cu,Zn)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DD.30Niedermayrite
CdCu
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
7.DD.30Edwardsite
Cu
 
3
Cd
 
2
(SO
 
4
)
 
2
(OH)
 
6
·4H
 
2
O
7.DD.35Carrboydite
[(Ni
 
1-x
Al
 
x
)(OH)
 
2
][SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Glaucocerinite
(Zn
 
1-x
Al
 
x
)(OH)
 
2
(SO
 
4
)
 
x/2
 · nH
 
2
O
7.DD.35Honessite
(Ni
 
1-x
Fe
3+
x
)(OH)
 
2
[SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Hydrohonessite
(Ni
 
1-x
Fe
3+
x
)(OH)
 
2
[SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Motukoreaite
Mg
 
6
Al
 
3
(OH)
 
18
[Na(H
 
2
O)
 
6
][SO
 
4
]
 
2
 · 6H
 
2
O
7.DD.35Mountkeithite
[(Mg
 
1-x
Fe
3+
x
)(OH)
 
2
][SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Shigaite
Mn
 
6
Al
 
3
(OH)
 
18
[Na(H
 
2
O)
 
6
][SO
 
4
]
 
2
 · 6H
 
2
O
7.DD.35Wermlandite
Mg
 
7
Al
 
2
(OH)
 
18
[Ca(H
 
2
O)
 
6
][SO
 
4
]
 
2
 · 6H
 
2
O
7.DD.35Woodwardite
Cu
 
1-x
Al
 
x
(OH)
 
2
[SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Zincaluminite
Zn
 
6
Al
 
6
(SO
 
4
)
 
2
(OH)
 
16
 · 5H
 
2
O
7.DD.35Hydrowoodwardite
(Cu
 
1-x
Al
 
x
)(OH)
 
2
[SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Zincowoodwardite
Zn
 
1-x
Al
 
x
(OH)
 
2
[SO
 
4
]
 
x/2
 · nH
 
2
O
7.DD.35Natroglaucocerinite
Na
 
x
Zn
 
8-y
Al
 
y
(SO
 
4
)
 
(x+y)/2
(OH)
 
16
 · 6H
 
2
O
7.DD.35Nikischerite
Fe
2+
6
Al
 
3
(OH)
 
18
[Na(H
 
2
O)
 
6
][SO
 
4
]
 
2
 · 6H
 
2
O
7.DD.40Lawsonbauerite
(Mn
2+
 
,Mg)
 
9
Zn
 
4
(SO
 
4
)
 
2
(OH)
 
22
 · 8H
 
2
O
7.DD.40Torreyite
(Mg,Mn
2+
 
)
 
9
Zn
 
4
(SO
 
4
)
 
2
(OH)
 
22
 · 8H
 
2
O
7.DD.45Mooreite
(Mg,Zn,Mn
2+
 
)
 
15
(SO
 
4
)
 
2
(OH)
 
26
 · 8H
 
2
O
7.DD.55Bechererite
(Zn,Cu)
 
6
Zn
 
2
(SO
 
4
,HSiO
 
4
)
 
2
(OH)
 
12
7.DD.60Ramsbeckite
(Cu,Zn)
 
15
(SO
 
4
)
 
4
(OH)
 
22
 · 6H
 
2
O
7.DD.65Vonbezingite
Ca
 
6
Cu
 
3
(SO
 
4
)
 
3
(OH)
 
12
 · 2H
 
2
O
7.DD.70Redgillite
Cu
 
6
(SO
 
4
)(OH)
 
10
 · H
 
2
O
7.DD.75Chalcoalumite
CuAl
 
4
(SO
 
4
)(OH)
 
12
 · 3H
 
2
O
7.DD.75Nickelalumite
(Ni,Cu)Al
 
4
(SO
 
4
,(NO
 
3
)
 
2
)(OH)
 
12
 · 3H
 
2
O
7.DD.75Kyrgyzstanite
ZnAl
 
4
(SO
 
4
)(OH)
 
12
·3H
 
2
O
7.DD.80Guarinoite
(Zn,Co,Ni)
 
6
(SO
 
4
)(OH,Cl)
 
10
 · 5H
 
2
O
7.DD.80Schulenbergite
(Cu,Zn)
 
7
(SO
 
4
,CO
 
3
)
 
2
(OH)
 
10
 · 3H
 
2
O
7.DD.80Thérèsemagnanite
(Co,Zn,Ni)
 
6
(SO
 
4
)(OH,Cl)
 
10
 · 8H
 
2
O
7.DD.80UM1992-30-SO:CCuHZn
(Zn,Cu)
 
7
(SO
 
4
,CO
 
3
)
 
2
(OH)
 
10
 · 3H
 
2
O
7.DD.85Montetrisaite
Cu
 
6
(SO
 
4
)(OH)
 
10
 · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.5.1Zinkosite
ZnSO
 
4
25.5.2Goslarite
ZnSO
 
4
 · 7H
 
2
O
25.5.4Ktenasite
Zn(Cu,Zn)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 6H
 
2
O
25.5.5Ramsbeckite
(Cu,Zn)
 
15
(SO
 
4
)
 
4
(OH)
 
22
 · 6H
 
2
O
25.5.6Boyleite
(Zn,Mg)SO
 
4
 · 4H
 
2
O
25.5.7Serpierite
Ca(Cu,Zn)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
25.5.8Orthoserpierite
Ca(Cu,Zn)
 
4
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
25.5.9Zincaluminite
Zn
 
6
Al
 
6
(SO
 
4
)
 
2
(OH)
 
16
 · 5H
 
2
O
25.5.10Glaucocerinite
(Zn
 
1-x
Al
 
x
)(OH)
 
2
(SO
 
4
)
 
x/2
 · nH
 
2
O
25.5.11Gunningite
ZnSO
 
4
 · H
 
2
O
25.5.12Chaidamuite
ZnFe
3+
 
(SO
 
4
)
 
2
(OH) · 4H
 
2
O
25.5.13Bianchite
(Zn,Fe)SO
 
4
 · 6H
 
2
O
25.5.15Zincmelanterite
(Zn,Cu,Fe)SO
 
4
 · 7H
 
2
O
25.5.16Zincobotryogen
(Zn,Mg,Mn
2+
 
)Fe
3+
 
(SO
 
4
)
 
2
(OH) · 7H
 
2
O
25.5.17Schuetteite
Hg
2+
3
(SO
 
4
)O
 
2
25.5.18Gianellaite
(Hg
 
2
N)
 
2
SO
 
4

Other Names for Namuwite

Synonyms:
IMA1981-020
Other Languages:
German:Namuwit
Russian:Намууит
Spanish:Namuwita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Namuwite

Reference List:

- +
Bevins, R. E., Turgoose, S. & Williams, P. A. (1982): Namuwite, (Zn,Cu)4SO4(OH)6·4H2O, a new mineral from Wales. Mineral. Mag., 46, 51-54.

American Mineralogist (1983): 68: 281.

Lee Groat (1996) The crystal structure of namuwite, a mineral with Zn in tetrahedral and octahedral coordination, and its relationship to the synthetic basic zinc sulfates. American Mineralogist: 81: 238-243.

Internet Links for Namuwite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Namuwite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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    • Localities for Namuwite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Australia
     
    • New South Wales
      • Yancowinna Co.
    		No reference listed
    Austria
     
    • Carinthia
      • Gurktaler Alpen
        • St Veit an der Glan
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
      • Karawanken
        • Finkenstein
          • Mallestiger Mittagskogel
    		[Der Aufschluss 1996,4 p.186-192]
    • Salzburg
      • Saalfelden
        • Leogang
          • Hütten
            • Schwarzleograben
              • Schwarzleo District
    		Poeverlein, R. (2008): Euchroit und seine Begleiter vom prähistorischen Bergbau, Leogang, Österreich. Lapis, 33 (5), 13-22.
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
            • Brixlegg - Rattenberg
    		Schnorrer, G. & Poeverlein, R. (2008): Schwaz-Brixlegger Fundstellen. 6. Die Minerale des Gratlspitz bei Brixlegg in Tirol. Aufschluss 59, 7-28.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Příbram
    		RÜSENBERG, K. A. & PAULIŠ, P. (1996): Umbildungen und Neubildungen in den Schlackehalden der Blei- und Silberhütte von Příbram/ČR. Aufschluss 47, 267-287 (in German).
    Germany
     
    • Hesse
    		Schnorrer-Köhler, G. (1991): Mineralogische Notizen V. Aufschluss 42, 155-171.
    • Lower Saxony
      • Harz
        • Clausthal-Zellerfeld
          • Oberschulenberg
    		Lapis, 11 (1), 9-18+42
        • Goslar
          • Astfeld
    		van den Berg, W. & van Loon, C. (1990): Slag Minerals from the Rammelsberg, Harz Mountains, Germany. UK Journal of Mines & Minerals, 8, 18-23.; Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
          • Grane Reservoir
    		No reference listed
    • North Rhine-Westphalia
      • Bergisches Land
        • Engelskirchen
          • Loope
    		Habel, B. & Linder, R. (2009): Die Grube "Castor" bei Loope und ihre Mineralien. Mineralien-Welt 20 (3), 10-23
      • Eifel
        • Mechernich
          • Kall
    		Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
      • Sauerland
        • Marsberg
          • Copper mines
    		Schnorrer, G. (1993): Mineralogische Notizen VI. Aufschluss, 44, 44-58; Wittern: "Mineralfundorte in Deutschland", 2001
        • Meschede
          • Ramsbeck
    Günther SCHNORRER-KÖHLER, Aufschluss 36: 217-235
      • Siegerland
        • Müsen
    		Weiss. "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Niederschelden
    		SCHNORRER, G. (1995): Mineralogische Neuheiten von bekannten deutschen Fundorten. Lapis 20 (12), 43-48; 62.; Heinrich, M. & Reinhardt, M. (2011): Die Mineralien der Kobaltgrube "Alte Buntekuh" bei Niederschelden im Siegerland. Mineralien Welt. 22 (3): 14-27
        • Wilnsdorf
    		Lapis, 12 (1), 11-18+42.
    • Rhineland-Palatinate
      • Eifel
        • Mayen
          • Langenfeld
            • St Jost
    		Graf, HW., (1991): Die Grube Bendisberg, bei Virneburg / Eifel, Mineralien-Welt 5/91
      • Hunsrück
        • St Goar
    		S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Lahn valley
    		Wittern: "Mineralfundorte in Deutschland", 2001
          • Braubach
    		Schnorrer-Köhler, G. & David, W. (1991): Die Blei- und Silberhütte Braubach und ihre Haldenminerale. Lapis, 16 (1), 38-49; 58 (in German).
          • Frücht
    		Der Aufschluss Vol.55, March/April 2004
      • Siegerland
        • Niederfischbach
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
      • Taunus
        • St Goarshausen
          • Wellmich
    		S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Westerwald
        • Linz am Rhein
          • Rheinbreitbach
    		Weiss: "Mineralienfundstellen, Deutschland West", Weise (Munich), 1990
    • Saxony
      • Erzgebirge
        • Annaberg District
          • Königswalde
    		J. Gröbner und U. Kolitsch (2006): Neufunde aus dem Erzgebirge (II). Mineralien-Welt 17 (3), 22-27.
        • Freiberg District
          • Freiberg
            • Himmelfahrt Mine
    		Wittern: "Mineralfundorte in Deutschland", 2001
        • Schwarzenberg District
          • Beierfeld
    		[MinRec 30:203]
    Greece
     
    • Attikí Prefecture (Attica; Attika)
      • Lavrion District (Laurion; Laurium)
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
    		No reference listed
    No reference listed
    No reference listed
    Schnorrer-Köhler, G., Rewitzer, C., Standfuss, L. & Standfuss, K. (1988): Weitere Neufunde aus Lavrions antiken Schlacken. Lapis 13 (2), 11-14.
          • Passa Limani area
    		Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals of the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
    Italy
     
    • Sardinia
      • Carbonia-Iglesias Province
        • Nuxis
          • Tamara Mt.
    		"Giorgio Bortolozzi (visual identification)"
    • Tuscany
      • Livorno Province
        • Piombino
    		Muenchener Micromounter-Lithothek
    • Veneto
      • Vicenza Province
        • Torrebelvicino
          • Contrada Trentini
    		C. Lemanski, Jr. collection (6787CL).
          • Mercanti Valley
    		Pegoraro S., Orlandi P., Chiereghin P., Contin.A. and Toniolo E. (2009): I minerali del Monte Trisa, Torrebelvicino, Vicenza. Rivista Mineralogica Italiana, No. 3, 160-179
    Pegoraro S., Orlandi P., Chiereghin P., Contin.A. and Toniolo E. (2009): I minerali del Monte Trisa, Torrebelvicino, Vicenza. Rivista Mineralogica Italiana, No. 3, 160-179
    Namibia
     
    • Otjikoto Region (Oshikoto)
      • Tsumeb
    		Minerals and their Localities Bernard and Hyrsl pg. 420; American Mineralogist, Volume 81, pages 238-243, 1996
    Norway
     
    • Buskerud
      • Drammen
        • Konnerud
    		Selbekk R.S. (2010): Norges mineraler. En revidert utgave av Norges mineraler (Neumann 1985). Tapir-NGU-NHM. p 245
      • Modum
        • Åmot
    		Raade,G.(1995): "Secondary Zn and Cu minerals from contact deposits of the Oslo region, Norway".Bergverksmuseet Skrift nr 9, 18-26
    Romania
     
    • Bihor Co.
      • Brusturi
    		G.Koller,2009
    UK
     
    • England
      • Cumbria
        • North and Western Region (Cumberland)
          • North Pennines
            • Alston Moor District
              • Nenthead
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols. Livingstone, A., Bridges, T. F. and Bevins, R. E. (1990): Schulenbergite and namuwite from Smallcleugh Mine, Nenthead, Cumbria. J. Russell Soc. 3, 23-24.; American Mineralogist, Volume 81, pages 238-243, 1996
        • South Eastern Region (Westmorland)
          • Ullswater
            • Patterdale
    		Self collected David Clayton
      • Staffordshire
        • Ecton
          • Back of Ecton
    		UKJMM 15
    • Scotland
      • Strathclyde (Lanarkshire)
        • South Lanarkshire
          • Leadhills
            • Mine Hill-Broad Law
    		S.Rust Collection.
    • Wales
      • Ceredigion (Dyfed; Cardiganshire)
        • Ceulanymaesmawr
          • Talybont
            • Nant-y-Moch Reservoir area
        • Cwmrheidol
          • Ponterwyd
    		BMS Database
        • Trefeirig
          • Pen-bont Rhydybeddau
    		S. Rust collection
        • Upper Llanfihangell-y-Creuddyn
          • Pontrhydygroes
    		BMS Database, UKJMM 17
      • Conwy (Gwynedd; Caernarvonshire)
        • Gwydyr Forest area
          • Betws-y-coed
    		Mineralogical Magazine 1982 46 : 51-54.
      • Powys (Montgomeryshire)
        • Machynlleth
          • Dylife
    		American Mineralogist, Volume 81, pages 238-243, 1996; BMS Database
        • Penegoes
    		American Mineralogist, Volume 81, pages 238-243, 1996
    USA
     
    • New York
      • St. Lawrence Co.
        • Balmat-Edwards Zinc District
          • Balmat
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    • Utah
      • Tooele Co.
        • Oquirrh Mts
          • Ophir District
            • Ophir Hill area
    		Rocks & Minerals 83:1 pp 52-62
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