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Gordaite

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Formula:
NaZn4(SO4)(OH)6Cl · 6H2O
System:
Trigonal
Colour:
Colourless, pale bluish, ...
Lustre:
Vitreous
Hardness:
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).


Classification of Gordaite

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 Gordaite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, pale bluish, pale greenish
Hardness (Mohs):

Optical Data of Gordaite

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 Gordaite

Formula:
NaZn4(SO4)(OH)6Cl · 6H2O
Elements listed in formula:

Crystallography of Gordaite

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 Volume:
V 802.67 ų (Calculated from Unit Cell)

Type Occurrence of Gordaite

Relationship of Gordaite to other Species

Member of:
Other Members of Group:
ThérèsemagnaniteNaCo4(SO4)(OH)6Cl·6H2O
7.DF.05UklonskoviteNaMg(SO4)F · 2H2O
7.DF.10KainiteKMg(SO4)Cl · 3H2O
7.DF.15NatrochalciteNaCu2(SO4)2(OH) · 2H2O
7.DF.20MetasideronatriteNa2Fe(SO4)2(OH) · H2O
7.DF.20SideronatriteNa2Fe(SO4)2(OH) · 3H2O
7.DF.25DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2O
7.DF.25FleischeritePb3Ge(SO4)2(OH)6 · 3H2O
7.DF.25SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2O
7.DF.25MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2O
7.DF.30Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O
7.DF.35MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2O
7.DF.40LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O
7.DF.40VlodavetsiteAlCa2(SO4)2F2Cl · 4H2O
7.DF.45PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2O
7.DF.55Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2O
7.DF.60ArzruniteCu4Pb2(SO4)(OH)4Cl6 · 2H2O (?)
7.DF.65ElyitePb4Cu(SO4)O2(OH)4 · H2O
7.DF.70YecoraiteFe33+Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O
7.DF.75RiomarinaiteBi(SO4)(OH) · H2O
7.DF.80DukeiteBi243+Cr86+O57(OH)6 · 3H2O
7.DF.85XocolatliteCa2Mn24+(Te6+O6)2 · H2O

Other Names for Gordaite

Name in Other Languages:
German:Gordait
Spanish:Gordaita

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 Gordaite

Reference List:
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 Gordaite

mindat.org URL:
https://www.mindat.org/min-6975.html
Please feel free to link to this page.

Localities for Gordaite

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.
      • 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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