Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Ekatite

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



Formula:
(Fe
3+
 
,Fe
2+
 
,Zn)
 
12
(AsO
 
3
)
 
6
(AsO
 
3
,HSiO
 
4
)
 
2
(OH)
 
6
System:HexagonalColour:Brownish black
Lustre:VitreousHardness:3
This page provides mineralogical data about Ekatite.

Classification of Ekatite

IMA status:Approved
Nickel-Strunz 10th (pending) edition ID:4.JB.75

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
mindat.org URL:http://www.mindat.org/min-7049.html
Please feel free to link to this page.

Type Occurrence of Ekatite

Type Locality:Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia

Physical Properties of Ekatite

Lustre:Vitreous
Colour:Brownish black
Streak:Brown
Hardness (Mohs):3

Crystallography of Ekatite

Crystal System:Hexagonal

Optical Data of Ekatite

Type:Uniaxial (+)
RI values: nω = 1.990 nε = 2.080
Maximum Birefringence:δ = 0.090

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

Chemical Properties of Ekatite

Formula:
(Fe
3+
 
,Fe
2+
 
,Zn)
 
12
(AsO
 
3
)
 
6
(AsO
 
3
,HSiO
 
4
)
 
2
(OH)
 
6
Essential elements:As, Fe, H, O
All elements listed in formula:As, Fe, H, O, Si, Zn

Relationship of Ekatite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JB.05Fetiasite
(Fe
3+
 
,Fe
2+
 
,Ti)
 
3
(As
 
2
O
 
5
)O
 
2
4.JB.10Manganarsite
Mn
 
3
(As
 
2
O
 
4
)(OH)
 
4
4.JB.15Magnussonite
Mn
 
10
As
 
6
O
 
18
(OH,Cl)
 
2
4.JB.15UM1984-09-AsO:ClHMn
Mn
 
10
As
 
6
O
 
18
(OH)Cl
4.JB.20Armangite
Mn
2+
26
(AsO
 
3
)
 
14
(HAsO
 
3
)
 
4
(CO
 
3
)
4.JB.25Nanlingite
NaMg
 
4
(AsO
 
3
)
 
2
F
 
4
4.JB.30Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
(AsO
 
3
)
 
6
(SiO
 
4
)
 
2
4.JB.35Stenhuggarite
CaFeSb(AsO
 
3
)
 
2
O
4.JB.40Trigonite
Pb
 
3
Mn
2+
 
(AsO
 
3
)
 
2
(HAsO
 
3
)
4.JB.45Finnemanite
Pb
 
5
(AsO
 
3
)
 
3
Cl
4.JB.50Gebhardite
Pb
 
8
(As
 
2
O
 
5
)
 
2
OCl
 
6
4.JB.55Derbylite
Fe
3+
4
Ti
 
3
Sb
3+
 
O
 
13
(OH)
4.JB.55Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
(OH)
4.JB.55Graeserite
(Fe
3+
 
,Ti)
 
4
Ti
 
3
AsO
 
13
(OH)
4.JB.60Hemloite
(Ti,V
3+
 
,Fe
3+
 
,Al)
 
12
(As
3+
 
,Sb
3+
 
)
 
2
O
 
23
(OH)
4.JB.65Freedite
Cu
+
 
Pb
 
8
(AsO
 
3
)
 
2
O
 
3
Cl
 
5
4.JB.70Georgiadèsite
Pb
 
4
(AsO
 
3
)Cl
 
4
(OH)

Other Names for Ekatite

Synonyms:
IMA1998-024
Other Languages:
German:Ekatit
Russian:Экатит
Spanish:Ekatita

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 Ekatite

Reference List:

- +
Keller, P. (2001): Ekatite, (Fe3+,Fe2+,Zn)12(OH)6[AsO3]6[AsO 3,HOSiO3]2, a new mineral from Tsumeb, Namibia, and its crystal structure. European Journal of Mineralogy: 13, 769-777.

Internet Links for Ekatite

Search Engines:
  • Look for Ekatite on Google
  • Look for Ekatite images on Google
    • External Links:
  • Look for Ekatite on Webmineral
  • Look for Ekatite on Athena Mineralogy[Link Broken?]
  • Look for Ekatite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • webminerals
  • Fine Minerals from Weinrich Minerals, Inc.
  • Search for Ekatite from all mineral dealers at minfind.com
  • Buy from David K Joyce minerals
  • Edwards Minerals - Fine Specimens
  • Search for - Ekatite - on e-Rocks Mineral Sales & Auctions
  • Find Ekatite on www.crystalclassics.co.uk
  • The Arkenstone - Fine Minerals
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Fabre Minerals - search for Ekatite specimens
  • Buy fine minerals and gemstones from Pala International
  • Search for minerals at Heliodor
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Ekatite

    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.
    Hide Locality List
    (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.
    Australia
     
    • New South Wales
      • Yungnulgra Co.
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    		[EJM 13 (2001), 769; MinRec 33:162]
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. 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: 28th Aug 2011 19:01:55
    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