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Namuwite

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National Museum Cardiff
Formula:
Zn4SO4(OH)6 · 4H2O
System:
Trigonal
Colour:
Sea green
Lustre:
Pearly
Hardness:
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 Harz 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

Approved
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
31.4.7.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
4 : (AB)4(XO4)Zq·xH2O
25.5.3

25 : Sulphates
5 : Sulphates of Zn and Hg

Physical Properties of Namuwite

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

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

IMA Formula:
Zn4SO4(OH)6 · 4H2O
Mindat.org Formula:
Zn4(SO4)(OH)6 · 4H2O

May contain considerable Cu; measured Zn:Cu ratios in samples from different localities: 2.5:1.5; 2.3:1.7; 3.3:0.8.
Elements listed in formula:

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 Data:
d-spacingIntensity
10.59 (100)
4.15 (25)
2.71 (42)
2.63 (41)
2.41 (22)
1.57 (23)
1.55 (20)

Type Occurrence of Namuwite

Relationship of Namuwite to other Species

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.30NiedermayriteCu4Cd(SO4)2(OH)6 · 4H2O
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.35NatroglaucoceriniteZn8-xAlx(OH)16(SO4)x/2+y/2Nay(H2O)6
7.DD.35NikischeriteNaFe62+Al3(SO4)2(OH)18(H2O)12
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.55BechereriteZn7Cu(OH)13[SiO(OH)3SO4]
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
25.5.1ZinkositeZnSO4
25.5.2GoslariteZnSO4 · 7H2O
25.5.4Ktenasite(Cu,Zn)5(SO4)2(OH)6 · 6H2O
25.5.5RamsbeckiteCu15(SO4)4(OH)22 · 6H2O
25.5.6BoyleiteZnSO4 · 4H2O
25.5.7SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
25.5.8OrthoserpieriteCaCu4(SO4)2(OH)6 · 3H2O
25.5.9Zincaluminite(Zn,Al)9(SO4)2(OH)18 · nH2O
25.5.10GlaucoceriniteZn1-xAlx(SO4)x/2(OH)2 · nH2O (x<0.5, n>3x/2)
25.5.11GunningiteZnSO4 · H2O
25.5.12ChaidamuiteZnFe3+(SO4)2(OH) · 4H2O
25.5.13BianchiteZnSO4 · 6H2O
25.5.15ZincmelanteriteZnSO4 · 7H2O
25.5.16ZincobotryogenZnFe3+(SO4)2(OH) · 7H2O
25.5.17SchuetteiteHg3O2(SO4)
25.5.18Gianellaite[(NHg2)2](SO4)(H2O)x, x~0

Other Names for Namuwite

Name in Other Languages:
German:Namuwit
Spanish:Namuwita

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 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

mindat.org URL:
https://www.mindat.org/min-2837.html
Please feel free to link to this page.
Specimens:
The following Namuwite specimens are currently listed for sale on minfind.com.

Localities for Namuwite

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.
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).
France
 
  • Occitanie
    • Hautes-Pyrénées
      • Aure Valley
Patrice Queneau Collection
Germany
 
  • Hesse
Schnorrer-Köhler, G. (1991): Mineralogische Notizen V. Aufschluss 42, 155-171.
  • Lower Saxony
    • Harz
      • Bad Harzburg
        • Oker valley
Niels van Velzen collection Mindat Photo ID: 618515. Obtained from Stichting GEA Amsterdam in 2004
      • Clausthal-Zellerfeld
        • Bockswies veins
          • 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
      • Iserlohn
        • Letmathe
http://www.mg-mineralien-fossilien.de/?Rpage=sauerland/?Rpage=letmathe1.html
      • 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-Anhalt
    • Mansfeld Basin
      • Hettstedt
        • Copper-Silver smelter (Gottesbelohnung smelter) slag locality
Mineralien Welt 15 Jg.Heft 2 März-April 2004 and Mineralien Welt 19Jg Heft1 Jan -Febr, 2008 Hoorst Knoll
  • 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)
Katerinopoulos, A. & Zissimopoulou, E. (1994): New mineral occurences from the Laurium mines. Mineralogical Record, 25, 279-280.
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
        • Sounion area
ko.jansen; Laurion tHE MINERALS IN THE ANCIENT SLAGS BY PIET GELAUDE ETC.
Italy
 
  • Sardinia
    • Carbonia-Iglesias Province
      • Nuxis
        • Tamara Mt.
"Giorgio Bortolozzi (visual identification)"
  • Tuscany
    • Livorno Province
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
Bonotti, F., Nannoni, R. (2012): Le scorie antiche della Toscana centrale. Riv. Mineral. Ital., 36, 3 (3-2012), 186-94.
      • Piombino
Muenchener Micromounter-Lithothek
  • Veneto
    • Vicenza Province
      • Torrebelvicino
        • 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
        • Monte Naro
          • Monte Naro - Riolo Valley side
            • Contrada Trentini
C. Lemanski, Jr. collection (6787CL).
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Djebel Saghro (Jbel Saghro)
        • Bou Skour district
Georges FAVREAU collection
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
Slovenia
 
  • Radlje ob Dravi (Mahrenberg)
Trajanova, M. & Zorz, Z. (2013): The abandoned Remshnig mine, occurrence of rare minerals; Palaeozoic or Tertiary ore mineralization? Berichte Geol. B.-A., 99, 11th Workshop on Alpine Geological Studies & 7th IFAA, 90-91.
UK
 
  • England
    • Cumbria
      • 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
      • Ullswater
        • Patterdale
Self collected David Clayton
    • Staffordshire
      • Ecton
        • Back of Ecton
UKJMM 15
  • Scotland
    • Strathclyde
      • South Lanarkshire
        • Leadhills
          • Mine Hill-Broad Law
S.Rust Collection.
  • Wales
    • Ceredigion
      • 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
      • Gwydyr Forest area
        • Betws-y-coed
Mineralogical Magazine 1982 46 : 51-54.
    • Powys
      • 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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