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PhotosPhillipsite - Bonacker quarry, Gedern, Wetteraukreis, Hesse, Germany

15th Apr 2019 10:05 UTCJoachim Esche 🌟 Expert

Phillipsite Subgroup

Bonacker quarry, Gedern, Wetteraukreis, Darmstadt, Hesse, Germany

BRD means 'Bundesrepublik Deutschland' (= Federal Republic of Germany)

I think it's a rough sort criterion of a previous owner or part of the locality string.

Joachim Esche

15th Apr 2019 10:33 UTCUwe Kolitsch Manager

Fixed.

15th Apr 2019 11:31 UTCJamison K. Brizendine 🌟 Expert

Thanks you gentlemen! I thought that BRD was perhaps an initials, but Joachim's explanation makes far more sense.

3rd Jun 2019 14:29 UTCAndré Robbemond

Does anyone know if research is done on the various types (K/Ca/Na) of phillipsite/erionite/faujasite of the Vogelsberg area, especially quarries in near Gedern, Herbstein, Langd and Gaulsberg?

3rd Jun 2019 18:48 UTCChristof Schäfer Manager

Passaglia, E. et al. (1998): Crystal chemistry of the zeolites erionite and offretite, American Mineralogist, Vol. 83, pp 577-589

4th Jun 2019 10:59 UTCUwe Kolitsch Manager

PDF here:

http://www.minsocam.org/MSA/ammin/toc/Articles_Free/1998/Passaglia_p577-589_98.pdf

5th Jun 2019 13:30 UTCAndré Robbemond

Thanks Christof/Uwe!

Unfortunately this refers only to another document I could not find a digital copy of on the WWW.

Betz, V., & Hentschel, G. (1978). Offretit und erionit vonGedern (Vogelsberg). Geologisches Jahrbuch Hessen,106, 419–42.

Wonder if Volker and Gerhard had these details back in those days.

Hope to find the various extentions of phillipsite/erionite/faujasite/offretite in the quarries near Gedern, Herbstein, Langd and the Gaulsberg (Ortenberg) since they are not detailed in mindat.

5th Jun 2019 20:57 UTCVolker Betz 🌟 Expert

Hi André,

Since 1978 and today 41 years of progess in science ! I just finished a paper about the zeolites in Vogelsberg, a kind of a review. It will published at beginning of July in Aufschluss the magazine of VFMG. Some of your questions may answered, but many are still open. The reason is that special mineralogy is a almost abanoned science at german universities.

Discriminating offretite and erionite is now done by Mg content. (and difficult):

Dogan, A.U. & Dogan, M. (2008): Re-evaluation and re-classification of erionite-series minerals.

Environ. Geochem. Health, 30, 355-366.

The analysed Faujasites are Faujasite-Ca

Wise,W. S. (1982) New occurrence of faujasite

in southeastern California. American Mineralogist.

67, 794-798. ( 3 results of Faujasite from Vogelsberg)

The offretite/ Erionite is mostly offretite but Erionite has been found at Ortenberg and Unterwidderheim ( in quartz rich xenolites)

The nature of phillipsites is typical Phillipsite-K but there are no recent analytical results.

Volker

.

6th Jun 2019 13:41 UTCAndré Robbemond

Thanks a lot for the additional info Volker!! looking forward to the Aufschluss copy .

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