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Duftite-alpha

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Big Photo

Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
© Rob Lavinsky




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:
Alpha-Duftite
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.
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    (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; Mineralogical Record, 8 (3), 130 pp.
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