Mindat Logo

Eurekadumpite

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



Formula:
(Cu,Zn)
 
16
(TeO
 
3
)
 
2
(AsO
 
4
)
 
3
Cl(OH)
 
18
· 7H
 
2
O
System:MonoclinicColour:Bright and deep ...
Hardness:2½ - 3
Name:Named after the type locality, the dump of the Centennial Eureka mine.


new structure type

Classification of Eurekadumpite

IMA status:Approved 2009
Dana 8th edition ID:34.8.10.

34 : SELENITES, TELLURITES AND SULFITES
8 : Compound Selenites, Tellurites and Sulfites
mindat.org URL:http://www.mindat.org/min-39785.html
Please feel free to link to this page.

Type Occurrence of Eurekadumpite

Type Locality:Centennial Eureka Mine (Blue Rock), Eureka, Tintic District, East Tintic Mts, Juab Co., Utah, USA
General Appearance of Type Material:Separate compact spherulites (more frequent hemispheres) and rosettes up to 1 mm in diameter.
Place of Conservation of Type Material:Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (3962/1);
Smithsonian Museum of Natural History, Washington, D.C., USA (174877);
American Museum of Natural History, New York City, USA (112206).
Geological Setting of type material:Polymetallic oxide zone material on mine dump
Associated Minerals at type locality:
QuartzOliveniteMcalpineiteMalachiteGoethite

Physical Properties of Eurekadumpite

Lustre:Silky
Diaphaneity (Transparency):Transparent, Translucent
Comment:Silky on the surface of the aggregates and nacreous on the separate lamellas
Colour:Bright and deep blue-green to turquoise-coloured
Streak:Light turquoise-coloured
Hardness (Mohs):2½ - 3
Tenacity:Flexible
Cleavage:Perfect
on {010}
Fracture:Micaceous
Density (measured):3.76(2) g/cm3
Density (calculated):3.826 g/cm3

Crystallography of Eurekadumpite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P2/m
Space Group Setting:P2/m
Cell Parameters:a = 8.28(3) Å, b = 18.97(2) Å, c = 7.38(2) Å
β = 121.3(6)°
Ratio:a:b:c = 0.436 : 1 : 0.389
Unit Cell Volume:V 990 ų
Z:1
Morphology:Pseudohexagonal or rounded lamellas with the main form {010}.
Comment:Space group P2/m, P2 or Pm
X-Ray Powder Diffraction:
d-spacingIntensity
18.92 (100)
9.45 (19)
4.716 (10)
4.111 (13)
3.777 (24)
2.692 (15)
2.524 (41)
1.558 (22)

Optical Data of Eurekadumpite

Type:Biaxial (-)
RI values: nα = 1.690(1) nβ = 1.775(5) nγ = 1.775(5)
2V:Measured: 10° (5)
Maximum Birefringence:δ = 0.085

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Pleochroism:Strong
Comments:X = light turquoise-coloured, Y = Z = deep blue-green

Chemical Properties of Eurekadumpite

Formula:
(Cu,Zn)
 
16
(TeO
 
3
)
 
2
(AsO
 
4
)
 
3
Cl(OH)
 
18
· 7H
 
2
O
Simplified for copy/paste:(Cu,Zn)16(TeO3)2(AsO4)3Cl(OH)18 ·7H2O
Essential elements:As, Cl, Cu, H, O, Te
All elements listed in formula:As, Cl, Cu, H, O, Te, Zn
Analytical Data:Average of 14 electron-microprobe analyses; water content was determined using the Alimarin method. Sample from the type locality.
FeO (0.04)
CuO (36.07)
ZnO (20.92)
TeO2 (14.02)
As2O5 (14.97)
Cl (1.45)
H2O (13.1)
O=Cl (-0.33)
Total (100.24)
Empirical Formula:
(Cu
 
10.32
Zn
 
5.85
Fe
 
0.01
)(TeO
 
3
)
 
2
(AsO
 
4
)
 
2.97
[Cl
 
0.93
(OH)
 
0.07
](OH)
 
18.45
· 7.29H
 
2
O

Other Names for Eurekadumpite

Synonyms:
IMA2009-072
Other Languages:

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 Eurekadumpite

Reference List:

- +
Pekov I.V., Chukanov N.V., Zadov A.E., Roberts A.C., Jensen M.C., Zubkova N.V., Nikischer A.J. (2010) Eurekadumpite, (Cu,Zn)16(TeO3)2(AsO4)3Cl(OH)18·7H2O, a new hypergene mineral. Zapiski Rossiyskogo Mineralogicheskogo Obshchestva, 139(4, 26-35 (in Russian). English translation: (2011) Geology of Ore Deposits, 53, 575-582.

Pekov I.V., Jensen M.C., Roberts A.C. and Nikischer A.J. (2010) A New Mineral from an Old Locality: Eurekadumpite Takes Seventeen Years to Characterize. Mineral News, Vol. 26, No. 2, pages 1ff.

Internet Links for Eurekadumpite

Search Engines:
  • Look for Eurekadumpite on Google
  • Look for Eurekadumpite images on Google
  • External Links:
  • Look for Eurekadumpite on Webmineral
  • Look for Eurekadumpite on Athena Mineralogy
  • Look for Eurekadumpite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • SpiriferMinerals.com - high quality low prices
  • Fabre Minerals - search for Eurekadumpite specimens
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Fine Minerals from Weinrich Minerals, Inc.
  • Search for Eurekadumpite on Well-Arranged Molecules
  • Rare and Unusual minerals at Mineralogical Research Company
  • Fine minerals from bisbeeborn.com
  • Lapis Mineral Magazin
  • Buy from Dave Bunk Minerals
  • Eurekadumpite specimens for sale - minfind.com
  • Find Eurekadumpite on www.crystalclassics.co.uk
  • Buy RARE Minerals from Rocks of Africa
  • Localities for Eurekadumpite

    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.
    USA
     
    • Utah
      • Juab Co.
        • East Tintic Mts
          • Tintic District
            • Eureka
    Pekov I.V., Chukanov N.V., Zadov A.E., Roberts A.C., Jensen M.C., Zubkova N.V., Nikischer A.J. (2010) Eurekadumpite, (Cu,Zn)16(TeO3)2(AsO4)3Cl(OH)18·7H2O, a new supergene mineral // Zapiski RMO, in press.
            • Gold Chain Mine
    Marty, J., Kampf, A. R., Housley, R. M., Mills, S. J. & Weiß, S.. (2010). Seltene neue Tellurmineralien aus Kalifornien, Utah, Arizona und New Mexiko (USA). Lapis, 35 (12), 42-51; 66. [p. 49]
            • Mammoth
    Collected by and in the collection of Brent Thorne.
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: September 19, 2014 17:27:48
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds