Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Wilcoxite

Big Photo

Lichtenberg open cast, Ronneburg U deposit, Gera, Thuringia, Germany
© Thomas Witzke

Formula:
MgAl[F|(SO
 
4
)
 
2
] · 18H
 
2
O
System:TriclinicColour:Colourless, white
Name:Named after William Wilcox.


Aubertite Group.

Soluble in cold water. Will dissolve in its own crystal water if only slightly heated.

Classification of Wilcoxite

IMA status:Approved 1979
Strunz 8th edition ID:6/D.07-10
Nickel-Strunz 10th (pending) edition ID:7.DE.45

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
E : With only medium-sized cations; unclassified
Dana 8th edition ID:31.9.9.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
Hey's CIM Ref.:26.17

26 : Sulphates with Halide
mindat.org URL:http://www.mindat.org/min-4288.html
Please feel free to link to this page.

Type Occurrence of Wilcoxite

Type Locality:Lone Pine Mine, Lone Pine Hill area, Wilcox District, Catron Co., New Mexico, USA
Year of Discovery:1983

Physical Properties of Wilcoxite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, white

Crystallography of Wilcoxite

Crystal System:Triclinic
Cell Parameters:a = 14.9Å, b = 6.65Å, c = 6.77Å
α = 117.43°, β = 100.58°, γ = 80.17°
Ratio:a:b:c = 2.241 : 1 : 1.018
Unit Cell Volume:V 582.41 ų (Calculated from Unit Cell)

Optical Data of Wilcoxite

Type:Biaxial (-)
RI values: nα = 1.424 nβ = 1.436 nγ = 1.438
2V:Measured: 48° , Calculated: 44°
Maximum Birefringence:δ = 0.014

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:not discernible

Chemical Properties of Wilcoxite

Formula:
MgAl[F|(SO
 
4
)
 
2
] · 18H
 
2
O
Essential elements:Al, F, H, Mg, O, S
All elements listed in formula:Al, F, H, Mg, O, S

Relationship of Wilcoxite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DE.05Mangazeite
Al
 
2
[(OH)
 
4
|SO
 
4
] · 3H
 
2
O
7.DE.10Carbonatecyanotrichite
Cu
 
4
Al
 
2
[(OH)
 
12
|(CO
 
3
,SO
 
4
)] · 2H
 
2
O
7.DE.10Cyanotrichite
Cu
 
4
Al
 
2
[(OH)
 
12
|SO
 
4
] · 2H
 
2
O
7.DE.10UKI-1975-(SO:AlCu)
Cu, Al, SO4, H2O
7.DE.15Schwertmannite
Fe
3+
16
O
 
16
(OH,SO
 
4
)
 
12-13
 · 10-12H
 
2
O
7.DE.20Tlalocite
Cu
 
10
Zn
 
6
(TeO
 
3
)(TeO
 
4
)
 
2
Cl(OH)
 
25
·27H
 
2
O
7.DE.25Utahite
Cu
 
5
Zn
 
3
[(OH)
 
2
|TeO
 
4
]
 
4
 · 7H
 
2
O
7.DE.35Coquandite
Sb
 
6
[O
 
8
|SO
 
4
] · H
 
2
O
7.DE.40Osakaite
Zn
 
4
(SO
 
4
)(OH)
 
6
 ·5H
 
2
O
7.DE.50Stanleyite
(V
4+
 
O)[SO
 
4
] · 6H
 
2
O
7.DE.55Mcalpineite
Cu
 
3
[TeO
 
6
] · H
 
2
O
7.DE.60Hydrobasaluminite
Al
 
4
[(OH)
 
10
|SO
 
4
] · 12-36H
 
2
O
7.DE.65Zaherite
Al
 
12
[(OH)
 
26
|(SO
 
4
)
 
5
] · 20H
 
2
O
7.DE.70Lautenthalite
PbCu
 
4
(SO
 
4
)
 
2
(OH)
 
6
·3H
 
2
O
7.DE.75Camerolaite
Cu
 
4
Al
 
2
[(OH)
 
10
|CO
 
3
|(HSbO
 
4
,SO
 
4
)] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
26.1Kogarkoite
Na
 
3
[F|SO
 
4
]
26.2Sulphohalite
Na
 
6
[F|Cl|(SO
 
4
)
 
2
]
26.3Schairerite
Na
 
3
[(F,Cl)|SO
 
4
]
26.4Galeite
Na
 
15
[F
 
4
|Cl|(SO
 
4
)
 
5
]
26.5Connellite
Cu
 
19
[(OH)
 
32
|SO
 
4
|Cl
 
4
] · 3H
 
2
O
26.6Chlorothionite
K
 
2
Cu[Cl
 
2
|SO
 
4
]
26.7Kamchatkite
KCu
 
3
[O|Cl|(SO
 
4
)
 
2
]
26.8Spangolite
Cu
 
6
Al[(OH)
 
12
|Cl|SO
 
4
] · 3H
 
2
O
26.9Aubertite
CuAl[Cl|(SO
 
4
)
 
2
] · 14H
 
2
O
26.10Magnesioaubertite
(Mg,Cu)Al[Cl|(SO
 
4
)
 
2
] · 14H
 
2
O
26.11Svyazhinite
(Mg,Mn
2+
 
,Ca)(Al,Fe
3+
 
)[F|(SO
 
4
)
 
2
] · 14H
 
2
O
26.12D'Ansite
Na
 
21
Mg(SO
 
4
)
 
10
Cl
 
3
26.13Anhydrokainite
KMgClSO
 
4
26.14Kainite
KMg[Cl|SO
 
4
] · 3H
 
2
O
26.15Mosesite
[Hg
 
2
N]
+
 
(Cl,SO
 
4
,MoO
 
4
) · H
 
2
O
26.16Kleinite
[Hg
 
2
N]
+
3
Cl
 
2
S
 
0.5
 · H
 
2
O
26.18Creedite
Ca
 
3
[SO
 
4
|Al
 
2
F
 
8
(OH)
 
2
] · 2H
 
2
O
26.19Lannonite
HCa
 
4
Mg
 
2
Al
 
4
(SO
 
4
)
 
8
F
 
9
·32H
 
2
O
26.20Chukhrovite-(Y)
Ca
 
3
(Y,Ce)[F|SO
 
4
|(AlF
 
6
)
 
2
] · 10H
 
2
O
26.21Chukhrovite-(Ce)
Ca
 
3
(Ce,Y)[F|SO
 
4
|(AlF
 
6
)
 
2
] · 10H
 
2
O
26.22Grandreefite
Pb
 
2
SO
 
4
F
 
2
26.23Pseudograndreefite
Pb
 
6
SO
 
4
F
 
10
26.24Sundiusite
Pb
 
10
[O
 
8
|SO
 
4
|Cl
 
2
]
26.25Caracolite
Na
 
3
Pb
 
2
[Cl|(SO
 
4
)
 
3
]
26.26Mammothite
Pb
 
6
Cu
 
4
AlSb[(OH)
 
9
|Cl
 
2
|SO
 
4
]
 
2
26.27Atlasovite
K(BiO)Cu
 
6
Fe
3+
 
[Cl|O
 
3
|(SO
 
4
)
 
5
]
26.28Xitieshanite
Fe
3+
 
[Cl|SO
 
4
] · 6H
 
2
O
26.29Nabokoite
KCu
 
7
Te
4+
 
[Cl|O
 
4
|(SO
 
4
)
 
5
]

Other Names for Wilcoxite

Synonyms:
IMA1979-070
Other Languages:
German:Wilcoxit
Spanish:Wilcoxita

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 Wilcoxite

Reference List:Mineralogical Magazine (1983): 47: 37-40.

American Mineralogist (1984): 69: 408.

Internet Links for Wilcoxite

Search Engines:
  • Look for Wilcoxite on Google
  • Look for Wilcoxite images on Google
    • External Links:
  • Look for Wilcoxite on Webmineral
  • Look for Wilcoxite on Athena Mineralogy
  • Look for Wilcoxite on Wikipedia
  • Look for Wilcoxite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Wilcoxite in the Natural History Museum (London) online catalogue
  • Wilcoxite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy Minerals and Crystals from Crystalarium.com
  • Edwards Minerals - Fine Specimens
  • Wendel Minerals - Auktion & Shop
  • Buy fine minerals and gemstones from Pala International
  • Lapis Mineral Magazin
  • Buy minerals from Mineralium.com
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Fabre Minerals - search for Wilcoxite specimens
  • Fine Minerals from Dan Weinrich Minerals
  • The Arkenstone - Fine Minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy from David K Joyce minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Wilcoxite

    Hide Locality List
    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.
    (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.
    Germany
     
    • Thuringia
      • Gera
        • Ronneburg U deposit
    		T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
    Italy
     
    • Piedmont
      • Cuneo Province
        • Gesso Valley
          • Entracque
    		Ciriotti, M. E., Ferrero, S., Blass, G., & Ambrino, P. (2008). Wilcoxite: primo ritrovamento italiano. MICRO (UK report), 2/2008, 75-76.
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Verkhoyansk Fold Belt
          • Verkhoyansk Silver Province
            • Deputatsky ore cluster
    		Zhdanov Yu.Ya., Solov’yev L.I. and Suknev V.S. (1993) Wilcoxite from Yakutia, its second find in the world, - Doklady Rus. Ac. Nauk, 317, p. 136–139 (in Rus.).
    Switzerland
     
    • Wallis (Valais)
      • Martigny
        • Mont Chemin
    		Stalder, H. A., Wagner, A., Graeser, S. und Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf Verlag, Basel, 579 pp.
    USA
     
    • Michigan
      • Dickinson Co.
        • Menominee iron range
          • Randville
    		Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
    • New Mexico
      • Catron Co.
        • Wilcox District
          • Lone Pine Hill area
    		Min.Mag.(1983) 47, 37-40; Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 21st Oct 2009 13:55:09