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Köttigite from
Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany


07393590017371833002289.jpg
Köttigite, etc.

Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany
07393590017371833002289.jpg
Köttigite, etc.

Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany
04934780017360850391889.jpg
Köttigite, etc.

Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany
Locality type:Mine
Classification
Species:Köttigite
Formula:Zn3(AsO4)2 · 8H2O
Comments:Schnorrer-Köhler (1988):

Associated with chalcopyrite, calcite and/or quartz.
Röntgenographic analysis cannot distinguish köttigite from hörnesite (the Mg end-member of the vivianite group).
However, köttigite's refractive index is higher than 1.60 (whereas that of hörnesite is lower than 1.60).
Moreover, apart from As only Zn and some Fe were found by qualitative analysis.
Habit:up to 0.2mm showing {010}, {100} and {101}
Colour:colourless with a light greenish tinge
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz1
Data
Mineral Data:Click here to view Köttigite data
Locality Data:Click here to view Glücksrad Mine, Oberschulenberg, Clausthal-Zellerfeld, Goslar District, Lower Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:30546
Long-form Identifier:1:3:30546:4
GUID (UUID V4):0
Nearest other occurrences of Köttigite
18.4km (11.5 miles) ⓘLudwig-Rudolf Mine, Braunlage, Goslar District, Lower Saxony, Germany
References
Schnorrer-Köhler, G. (1988) Mineralogische Notizen IV. Der Aufschluss: 39: 153-168 (in German).
Stark, M., Gröbner, J., Kolitsch, U. (2017) Ianbruceit aus Oberschulenberg im Harz. Lapis, 42(4), 42-43.
 
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