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Duftite-alpha

Colour:GreenHardness:3
A variety of Duftite

A variety of Duftite apparently isostructural with Descloizite (for literature see Duftite). Modern studies needed.
Originally described from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia.

Classification of Duftite-alpha

Dana 8th edition ID:41.5.2.5

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
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Physical Properties of Duftite-alpha

Lustre:Vitreous, Dull
Colour:Green
Hardness (Mohs):3

Optical Data of Duftite-alpha

Type:Biaxial (-)
RI values: nα = 2.040 nβ = 2.080 nγ = 2.100
Maximum Birefringence:δ = 0.060

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

Other Names for Duftite-alpha

Synonyms:
α-DuftiteAlpha-DuftiteDuftite-α
Other Languages:
German:α-Duftit
Spanish:α-Duftita

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.

Internet Links for Duftite-alpha

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    Localities for Duftite-alpha

    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
     
    • Rhineland-Palatinate
      • Lahn valley
        • Bad Ems District
          • Frücht
    Der Aufschluss Vol.55, March/April 2004
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    Hey p187
    Mineral and/or Locality
    Google
     
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    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: 18th Oct 2009 20:06:18