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Mineralogical ClassificationHuttonitic-Brabantite: Occurence?

13th Sep 2004 12:05 UTCVasudevan.Rajagopalan

Request: Very Very urgent Reply awaited by email followed by post on "Huttonitic-Brabantite"

Dear Sirs,

Good day. I am a mineral geo-chemist working on Electron Microprobe Analysis of radiaoctive phases, in a Government of India Atomic Minerals Division, Hyderabad, A.P. Recently I have got a distinct medium grained mineral phase whose chemical composition is not totally brabantite nor huttonite and it is exactly just in between "Brabantite" and "Huttonite" compositionally with respect to major & essential oxides Wt.%. PLEASE CLARIFY & CONFIRM "CAN THERE EXIST one or more MINERAL PHASE/s IN GEOLOGICAL ENVIRON WITH CHEMISTRY IN BETWEEN BRABANTITE & HUTTONITE? CAN SUCH PHASE BE CALLED AS "HUTTONITIC BRABANTITE" because of chemistry just like huttonitic monazite? Is there any such intermediate mineral reported so far? Can the join of Brabantite-Huttonite in the Ternary solid solution series of Monazite-Huttonite-Brabantite has some new phases reported? Please treat this request as very very urgent and reply by email followed by a letter to following address & IDs:

Vasudevan. Rajagopalan, Scientific Officer-F, Incharge, Electron Microprobe Laboratory, Atomic Minerals Directorate for Exploration & Research, Department of Atomic Energy, Govt. of India, 1-10-153, Begumpet, HYDERABAD-500016, Andhra Pradesh, India.

Email: vrajagopalan_2000@yahoo.com

with CC to aniraja@eth.net

Thanks a lot in advance for sparing your and others valuable time in clearing my research findings.

With warm regards and best wishes,

Yours sincerely,

Vasudevan.Rajagopalan

Place: Hyderabad, A.P., India

Date: 13th September 2004 16:15 Hrs IST

13th Sep 2004 21:41 UTCJim Ferraiolo

You might check:

Hans-Jürgen Förster

The chemical composition of REE-Y-Th-U-rich accessory minerals in peraluminous granites of the Erzgebirge-Fichtelgebirge region, Germany, Part I: The monazite-(Ce)-brabantite solid solution series (AmMin 83,259-272(1998) for information about the huttonite-monazite-brabantite series.

http://www.minsocam.org/MSA/AmMin/TOC/Articles_Free/1998/Forster_p259-272_98.pdf

I'll check for any additional papers, but nothing I have looked at mentions a "huttonitic brabantite"

15th Sep 2004 11:44 UTCVasudevan.Rajagopalan

Dear Dr.Jim Ferraiolo,

Good day. Thanks a lot for your interest in my querry on the occurrence of Huttonitic-brabantite. In fact, there are literature / references available on monazite-huttonite and monazite-cheralite solid solution series. But, my EPMA data clearly shows a composition that is in between typical Huttonite and typical brabantite. Therefore, I humbly request you once again to confirm <1> whether there can be a real existence of solid solution series between Huttonite and Brabantite? <2> If yes, is there any phase reported or published else where? <3> If not, what should be the nomenclature given for my elemental oxide EPMA data given in my first letter >? Your reply is awaited. Sorry for the trouble and inconvenience in this regard.

With regards,

Yours sincerely,

Vasudevan.Rajagopalan

AMD, DAE, Begumpet, Hyderabad-500016, A.P., India

Date: 15th September 2004 <16:21 hrs IST>

15th Sep 2004 12:35 UTCErnst A.J. Burke

The term 'huttonitic' brabantite was used by Stuart Mills in his presentation during the MM5 meeting in Paris last week; the samples were from the Lake Boga granite in Victoria, Australia. The e-mail address of Stuart Mills is: smills@museum.vic.gov. The abstract is available from the MM5 website: www.ensmp.fr/MM5

Ernst Burke.

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