EDX spectra of α-Titanium covered by films of Osbornite from GFE of Tolbachik.

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Copyright © Pavel M. Kartashov collection & photo
minID: LCJ-VG8

EDX spectra of α-Titanium covered by films of Osbornite from GFE of Tolbachik.

Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 250 μm

The upper spectrum, obtained from the central part of the dendrite, shows minor peaks of Cu and S in ratio close to 2:1 (Cu 0.90, S 0.23 mas.%). Apparently in this place metallic titanium covered by Chalcocite (?) film.
The lower spectrum, obtained from the leftmost part (basement) of the dendrite, shows minor peak of nitrogen (2.45 mas.% N). Obviously this part of the sample covered by film of Osbornite TiN. Of course this film is too thin to be investigated quantitatively, but it give its input in summar spectrum. When such films are enough thick and covers significant areas of micronuggets, the later obtains specific golden-yellowish colour visible even under binocular. Larger intencity of cabon peak in this spectrum reflects only more close point of analysis to carbon current-conducted basement of the preparate. Characteristic X-ray mapping shows absence of carbon in composition of the sample. Alas, no Khamrabaevite films over these samples...
The leftmost, loop-like end of the dendrite (its termination) in addition to Ti peaks contains only peak of oxigen. Probably this end of specimen was oxidized with formation of Rutile film.
This is part of material described in the article Glavatskih S.F., Gorshkov A.I., e.a. (1992) Natural analogue of α-Titanium in exhalations products of Big Fissure Tolbachik Eruption (Kamchatka), - Doklady RAN, 327, №1, pp. 126-130 (in Russian).
Pavel M. Kartashov analytical data, collection and photo.

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