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Namuwite

A valid IMA mineral species
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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.
Colour:
Sea green
Lustre:
Pearly
Hardness:
2
Specific Gravity:
2.77
Crystal System:
Trigonal
Member of:
Namuwite Group
Name:
An acronym for the NAtional MUseum of Wales.
Type Locality:
ⓘAberllyn Mine, Betws-y-coed, Conwy, Wales, UK
Probably the Zn analogue ofUM2003-20-SO:CuHZn. 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 factUnnamed (Gordaite-related Ca-Zn Sulphate Chloride Hydrate) (U. Kolitsch, unpubl. data).

May appear visually similar toschulenbergite andminohlite.


Unique Identifiers
First published:
1982
Type description reference:
Bevins, Richard E., Turgoose, Stephen, Williams, Peter A. (1982) Namuwite, (Zn,Cu)4SO4(OH)6.4H2O, a new mineral from Wales.Mineralogical Magazine, 46 (338) 51-54doi:10.1180/minmag.1982.046.338.09

Classification of Namuwite

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 ed.:
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

Mineral Symbols
Colour:
Sea green
Streak:
Pale green
Hardness:
2 onMohs scale
Cleavage:
Perfect
(0001)
Density:
2.77 g/cm3 (Measured)    2.81 g/cm3 (Calculated)

Optical Data of Namuwite

Crystallography of Namuwite
General Appearance of Type Material:
Rounded encrustation, seemingly amorphous to the naked eye. Using SEM, seen as aggregates of subperfect hexagonal plates up to 60 µm across.
Place of Conservation of Type Material:
National Museum of Wales, Cardiff, Wales, 27.111.GR414.
The Natural History Museum, London, England, 1983,341.
National Museum of Natural History, Washington, D.C., USA, 150334.
Geological Setting of Type Material:
Breccia of fragments of black pyritiferous slate, cemented by Zn-bearing and other minerals.
Associated Minerals at Type Locality:
AnkeriteCalciteHydrozincitePyriteQuartz
Sphalerite
Reference:
Bevins, Richard E., Turgoose, Stephen, Williams, Peter A. (1982) Namuwite, (Zn,Cu)4SO4(OH)6.4H2O, a new mineral from Wales.Mineralogical Magazine, 46 (338) 51-54doi:10.1180/minmag.1982.046.338.09

Synonyms of Namuwite

Other Language Names for Namuwite

Relationship of Namuwite to other Species
Other Members of Namuwite Group:
BechereriteZn7Cu(OH)13[(SiO(OH)3(SO4)]Trig. 3 :P3
GordaiteNaZn4(SO4)(OH)6Cl · 6H2OTrig.3 :P3
GuarinoiteZn6(SO4)(OH)10 · 5H2OHex.
Hanahanite [Zn8(OH)14(SO4)] · 3H2OHex. 6 :P63
Haywoodite[Pb(H2O)10][Zn12(OH)20(H2O)(SO4)3]Tric.1 :P1
Hodgesmithite(Cu,Zn)6Zn(SO4)2(OH)10 · 3H2OTrig. 3 :P3
LahnsteiniteZn4(SO4)(OH)6 · 3H2OTric. 1 :P1
OsakaiteZn4(SO4)(OH)6 · 5H2OTric.1 :P1
Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2OMon. 2/m
ThérèsemagnaniteNaCo4(SO4)(OH)6Cl · 6H2OTrig.3 :P3
TzeferisiteCaZn8(SO4)2(OH)12Cl2(H2O)9Trig.3m(32/m) :R3c

Common AssociatesMon. 2/m :P21/b7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2OMon. 2 :P217.DD.07LlantenesiteCu6Al[SeO4](OH)12Cl · 3H2OTrig. 3m :P31c7.DD.10LangiteCu4(SO4)(OH)6 · 2H2OMon.m7.DD.10FehriteMgCu4(SO4)2(OH)6 · 6H2OMon. 2/m :P21/b7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2OMon.m :Pm7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2OMon.m :Pm7.DD.10GobeliniteCoCu4(SO4)2(OH)6 · 6H2OMon. 2/m :P21/m7.DD.15KobyasheviteCu5(SO4)2(OH)6 · 4H2OTric.1 :P17.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2OTrig. 3m :P31c7.DD.15Unnamed (Dimorph of Devilline)CaCu4(SO4)2(OH)6 · 3H2OMon. 2/m :P21/b7.DD.20KtenasiteZnCu4(SO4)2(OH)6 · 6H2OMon. 2/m :P21/b7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2OTric.1 :P17.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6 · 4H2OMon. 2/m :P21/b7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2OMon. 2/m :P21/m7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OMon. 2/m :B2/b7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2OMon. 2 :B27.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OOrth.mm2 :Pca217.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2OMon. 2/m :P21/b7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig.3 :R37.DD.35Zincaluminite(Zn1-xAlx)(SO4)x/2(OH)2 · nH2O7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2OTrig.7.DD.35NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2OTrig.3m(32/m) :R3m7.DD.35Honessite(Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2OTrig.7.DD.35Carrboydite(Ni1-xAlx)(SO4)x/2(OH)2 · nH2OHex.7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2OHex.7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig.3m(32/m) :P3c17.DD.35NikischeriteFe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig.3 :R37.DD.35Hydrohonessite(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2OHex.7.DD.35WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2OTrig.3m(32/m) :R3m7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig.3m(32/m) :R3m7.DD.35Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2OHex.7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2OMon. 2/m :P21/b7.DD.40Torreyite(Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2OMon. 2/m :P21/b7.DD.40IsseliteCu6(SO4)(OH)10(H2O)4 · H2OOrth.mm2 :Pmn217.DD.45MooreiteMg9◻2Mn2Zn4(SO4)2(OH)26 · 8H2OMon. 2/m :P2/b7.DD.45Hodgesmithite(Cu,Zn)6Zn(SO4)2(OH)10 · 3H2OTrig. 3 :P37.DD.47LahnsteiniteZn4(SO4)(OH)6 · 3H2OTric. 1 :P17.DD.50Minohlite(Cu,Zn)7(SO4)2(OH)10 · 8H2OHex.7.DD.52LauraniiteCu6Cd2(SO4)2(OH)12 · 5H2OMon. 2/m :P21/b7.DD.55BechereriteZn7Cu(OH)13[(SiO(OH)3(SO4)]Trig. 3 :P37.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2OMon. 2/m7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2OMon. 2/m :P21/b7.DD.70RedgilliteCu6(SO4)(OH)10 · H2OMon. 2/m :P21/b7.DD.75NickelalumiteNiAl4(SO4)(OH)12(H2O)3Mon. 2/m7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12 · 3H2OMon. 2/m7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 :P217.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2OTrig. 37.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2OTrig. 3 :P37.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl · 6H2OTrig.3 :P37.DD.80GuarinoiteZn6(SO4)(OH)10 · 5H2OHex.7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2OOrth.mm2 :Cmc21

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    • References for NamuwiteⓘBroken HillElliott (2010)
    Austria
     
    Niedermayr et al. (1995)Puttner (1994)Puttner (1996)Poeverlein (2008)Auer (2023)Schnorrer et al. (2008)
    Bulgaria
     
    Petrov et al. (2022)
    Czech Republic
     
    RÜSENBERG et al. (1996)
    France
     
    Pascal Chollet collection - SEM-EDS ...Queneau (n.d.)
    Germany
     
    Schnorrer-Köhler (1991)Wittern et al. (1986)"Lithothek" collection of the ...Niels van Velzen collection Mindat ...van den Berg et al. (1990)+1 other referenceNeschen (n.d.)Groat (1996)C.Auer (2021)Schnorrer-Köhler (1988)Schnorrer-Köhler (1985)Schnorrer (1993)+1 other referenceBender et al. (1994)+1 other referenceWeiß (1990)Schnorrer (1995)+2 other referencesSchnorrer-Köhler (1987)Blaß et al. (1995)Habel et al. (2009)Graf (1992)Weiß (1990)Graf (1991)Weiß (1990)Weiß (1990)Wittern (2001)Der Aufschluss Vol.5558 (in German)+1 other referenceWeiß (1990)Neschen (n.d.)Neschen (n.d.)Knoll (2004)Knoll (2004)Gerhard Möhn collectionWitzke (1993)+1 other referenceGröbner et al. (2006)Wittern (2001)
    Greece
     
    Katerinopoulos et al. (1994)ko.jansen+1 other referenceRieck (n.d.)Gelaude et al. (1996)Schnorrer-Köhler et al. (1988)
    Italy
     
    Bortolozzi et al. (2018)Lecca et al. (2024)Bortolozzi (n.d.)Bortolozzi (n.d.)Bortolozzi et al. (2021)Bonotti et al. (2012)+1 other referenceMuenchener Micromounter-LithothekSergio Pegoraro et al. (2022)+2 other referencesPegoraro S. et al. (2009)Orlandi (2013)Pegoraro S. et al. (2009)C. Lemanski (6787CL)+1 other reference
    Morocco
     
    Favreau (n.d.)
    Namibia
     
    von Bezing (2007)
    Norway
     
    Rune S. Selbekk (2010)Raade (1993)+1 other reference
    Poland
     
    Nowinska (2020)
    Portugal
     
    Alves (n.d.)
    Romania
     
    G.KollerJanuszewska et al. (9th Meeting of the Mineralogical Society of Poland 28th Meeting of the Petrology group of the Mineralogical Society of Poland, October 19-22, 2023, Bielawa, Poland)
    Slovenia
     
    Palaeozoic or Tertiary ore ...+1 other reference
    UK
     
    American Mineralogist+2 other referencesSelf collected David ClaytonRust (1995)S.Rust Collection.S. Rust collectionDay (1999)S. Rust collectionGreen et al. (1996)+2 other referencesBevins et al. (1982)Groat (1996)+1 other referenceGroat (1996)
    USA
     
    Collected by Patrick HaynesAnthony et al. (2016)Anthony Kampf PXRD and EDS analysis. ...Rocks & Minerals 83:1 pp 52-62In the collection of Alex Earl
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