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Gordaite

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Formula:
NaZn4(SO4)(OH)6Cl · 6H2O
Colour:
Colourless, pale bluish, pale greenish
Lustre:
Vitreous
Hardness:
Crystal System:
Trigonal
Member of:
Name:
Named after the type locality, Sierra Gorda District, Tocopilla Province, Antofagasta Region, Chile.
Compare thérèsemagnanite and changoite (a similar but Cl-free chemistry).

Closely related to Unnamed (Zn Sulphate-Hydroxide-Chloride-Hydrate).
See also the anthropogenic slag phase Unnamed (Gordaite-related Ca-Zn Sulphate Chloride Hydrate).


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Classification of GordaiteHide

Approved
Approval Year:
1996
7.DF.50

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations

Physical Properties of GordaiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless, pale bluish, pale greenish
Hardness:
2½ on Mohs scale

Optical Data of GordaiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.561 nε = 1.538
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of GordaiteHide

Formula:
NaZn4(SO4)(OH)6Cl · 6H2O

Crystallography of GordaiteHide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
P3
Cell Parameters:
a = 8.413 Å, c = 13.095 Å
Ratio:
a:c = 1 : 1.557
Unit Cell V:
802.67 ų (Calculated from Unit Cell)

Type Occurrence of GordaiteHide

Synonyms of GordaiteHide

Other Language Names for GordaiteHide

German:Gordait
Spanish:Gordaita

Relationship of Gordaite to other SpeciesHide

Member of:
Other Members of this group:
ThérèsemagnaniteNaCo4(SO4)(OH)6Cl·6H2OHex.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Gypsum2 photos of Gordaite associated with Gypsum on mindat.org.
Herbertsmithite1 photo of Gordaite associated with Herbertsmithite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.DF.05UklonskoviteNaMg(SO4)F · 2H2OMon.
7.DF.10KainiteKMg(SO4)Cl · 3H2OMon. 2/m : B2/m
7.DF.15NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
7.DF.20MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
7.DF.20SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
7.DF.25DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2OHex. 6 m2 : P62c
7.DF.25FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DF.25SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DF.25MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2OHex. 6 : P63
7.DF.30Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
7.DF.35MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
7.DF.40LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O Tet. 4/m : I4/m
7.DF.40VlodavetsiteAlCa2(SO4)2F2Cl · 4H2OTet. 4/m : I4/m
7.DF.45PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2OMon. 2/m : B2/b
7.DF.55Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
7.DF.60ArzruniteCu4Pb2(SO4)(OH)4Cl6 · 2H2O (?)Orth.
7.DF.65ElyitePb4Cu(SO4)O2(OH)4 · H2OMon. 2/m
7.DF.70YecoraiteFe3+3Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O
7.DF.75RiomarinaiteBi(SO4)(OH) · H2OMon. 2/m
7.DF.80DukeiteBi3+24Cr6+8O57(OH)6 · 3H2OTrig. 3m : P3 1c
7.DF.85XocolatliteCa2Mn4+2(Te6+O6)2 · H2OMon. 2/m : P2/m

Other InformationHide

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 GordaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schlüter, J., Klaska, K.-H., Friese, K., Adiwidjaja, G. and Gebhard, G. (1997): Gordaite, NaZn4(SO4)(OH)6Cl•6H2O, a new mineral from the San Francisco Mine, Antofagasta, Chile. Neues Jahrbuch für Mineralogie, Monatshefte (1997): 155-162.
Nasdala, L., Witzke, T., Ullrich, B. and Brett, R. (1998): Gordaite [Zn4Na(OH)6(SO4)Cl•6H2O]: second occurrence in the Juan de Fuca Ridge, and new data. American Mineralogist 83, 1111-1116.
Mineralogical Record: 29: 235-236.
Zeitschrift für Kristallographie: 212: 704-707.

Internet Links for GordaiteHide

Localities for GordaiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill
Birch, W.D. (1999) Block 14 Open Cut, Broken Hill.
Chile (TL)
 
  • Antofagasta Region
    • Antofagasta Province
      • Sierra Gorda District
        • Caracoles
Neues Jahrb.(1997) 155-162
Germany
 
  • North Rhine-Westphalia
    • Sauerland
      • Iserlohn
        • Letmathe
http://www.mg-mineralien-fossilien.de/?Rpage=sauerland/?Rpage=letmathe1.html
  • Saxony-Anhalt
Wittern: "Mineralfundorte in Deutschland", 2001
      • Hettstedt
Roberto Bosi specimen
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
Fritz Schreiber collection
            • Hilarion area
J. Gröbner und U. Kolitsch (2002): Neufunde von Laurion aus den Jahren 2001 und 2002. Aufschluss 53 (5-6), 363-371.
        • Lavrion (Laurion; Laurium)
Blaß, G., Fabritz, K. H., Mühlbauer, W. and Prachar, I. (1998): Immer wieder Neues aus Lavrion. Mineralien-Welt 9 (2), 46-48 (in German).
        • Sounion area
Hanke, H. (1998) Laurion - ein Rückblick auf die Funde der letzten drei Jahre. Mineralien-Welt, 9 (2), 37-45.; Blaß, G., Fabritz, K. H., Mühlbauer, W. and Prachar, I. (1998) Immer wieder Neues aus Lavrion. Mineralien-Welt 9 (2), 46-48 (in German).;
J. Gröbner und U. Kolitsch (2002): Neufunde von Laurion aus den Jahren 2001 und 2002. Aufschluss 53 (5-6), 363-371.
Italy
 
  • Sardinia
    • Cagliari Province
      • Villaputzu
Orlandi, P. & Campostrini, I. (2005): Zibaldone. Aggiornamenti di mineralogia italiana 2004. Rivista Mineralogica Italiana, 3/2005, 184-191.
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Hexiong Yang
Pacific Ocean
 
  • East Pacific Rise
AmMin 83:1111-1116
Papua New Guinea
 
  • Bismarck Sea
    • Manus Basin
Steger, S. (2015): Mineralogical characterisation of a black smoker from the "Vienna woods" hydrothermal field, Manus Basin, Papua New Guinea: complex sulphide ores from a deep-sea hydrothermal system. Master Thesis, University of Vienna, Austria, 50 pp.
Spain
 
  • Catalonia
    • Lleida (Lérida)
      • El Pallars Jussà
        • La Vall Fosca
          • La Torre de Cabdella (La Torre de Capdella)
            • Castell-estaó
Joan Abella i Creus and Joan Viñals i Olià (2012) NUEVOS MINERALES DE LA “MINA EUREKA”: METAMUNIRITA, SCHRÖCKINGERITA, BOLTWOODITA Y GORDAITA, CASTELL-ESTAÓ, LA TORRE DE CABDELLA, LLEIDA, ESPAÑA. - http://mineralsabella.blogspot.com.es/2012/06/nuevos-minerales-de-la-mina-eureka.html
USA
 
  • Arizona
    • Yavapai Co.
Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 4.
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Joe Marty (2015) Minerals of the Blue Lizard Mine and other Western Localities, NCMA Annual Symposium 2015
Mineral and/or Locality  
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