I'll send you my short article with P. Thijssen and J.C. Schumacher on
Norwegian Hoegbomite published in Min. Mag.,56 (1992), 343-351. The paper
contains references to other Norwegian occurrences.
Arend Damman (Min. Mag., 52, (1988) 193-200)described a subsilicic sodium
gedrite from Bergslagen, Sweden with Na (A) 0.57-0.81 and Al(IV) 2.31-2.57.
Perhaps there are reports of higher sodium contents elsewere.
----- Original Message -----
From: "Pavel Azimov" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, November 05, 2001 7:46 PM
Subject: gedrite and hoegbomite
> Dear geo-metamorphic community,
> I have two quite metamorphic questions:
> 1. What is the highest Na concentration in gedrites? Can it exceed
> 0.5 f.u. Na?
> 2. Does anybody know the up-to-date works on hoegbomite in
> Mg-Al-riched metamorphic rocks? Is hoegbomite known at the
> Baltic shield?
> Thank in advance,
> Pavel Azimov, PhD
> Institute of Precambrian Geology and Geochronology
> Russian Academy of Sciences
> 2, Makarov Embankment
> St.Petersburg, 199034, Russia
> Phone: +7(812)328-03-62
> Fax: +7(812)328-48-01
> E-Mail: [log in to unmask]