Narsarsukite : Na4(Ti,Fe)2[Si8O20](O,OH,F)2

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minID: X12-42D

Narsarsukite : Na4(Ti,Fe)2[Si8O20](O,OH,F)2

This image has been released to the public domain and may be used freely.

Xl ~ 0.9 mm tall. Found Sept 2001. MOB coll.

New photo June 2013 with more accurate colors. But it’s still a lousy photo and the colors are still not quite right. Tough subject.

Nevertheless, this little xl is of interest because it was found in a very unexpected place, namely the Poudrette pegmatite (or possibly an “offshoot vein” thereof).
There are two child photos (one in stereo) which show the habit – especially the terminal faces –more clearly. But the colors are even further off from reality. (The color should be “champagne” – somewhat like that in [http://www.mindat.org/photo-178979.html].)

In any case, the termination is like that shown in diagram b. on p. 42 of the Lapis MSH special issue (July/August 2000). The prismatic habit is more like diagram f.

The xl is associated with well formed, but very tiny, colorless gaidonnayite xls (not shown in the photos). There is also a second, smaller, narsarsukite xl of very simple habit (also not shown).

Modified by CombineZP

This photo has been shown 590 times
Photo added:10th Aug 2008
Dimensions:1737x1866px (3.24 megapixels)
Date/Time of Photo:4th Jun 2013 14:55:53
Camera:CANON EOS 400D / Digital Rebel XTi / Kiss Digital X
Software:Adobe Photoshop CS3 Windows
Exposure time:1/3s
ISO speed:200

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