File:Niveolanite-569899.jpg

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English: Niveolanite
Locality: Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
The fibers span a bit < 5 mm. Found July 2002. MOB coll.
This is a lesson in stupidity: A cute little niveolanite “waterfall” on matrix. Except that it’s not on matrix. The fibers reside on a specimen that may be from the Poudrette pegmatite (but if so, it is a part with relatively simple mineralogy.) The problem is that the fibers are not really attached to the matrix and almost certainly came from two little fragments – stuck in the same box because they too have “UK” fibers. These fragments have more of the same fibers [1], and are probably pieces that fell off the specimen shown in [2]. What all of these fibers have in common is a “slow fizz” - characteristic of niveolnite - when immersed in HCl. (There is also some fibrous dawsonite which cause a brief rapid fizz when some samples are tested. In addition, some samples also have an inert residue – see the child photo of a sample slowly producing bubbles and leaving a residue). As for the “matrix”, as already noted, it is relatively simple: rhodochrosite, aegirine, polylithionite and microcline. However, the matrix has another – so far unidentified - white acicular/fibrous mineral [3], [4], – which is why the two sets of fragments got jumbled up.
Deutsch: Niveolanit
Fundort: Steinbruch Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Kanada
Date
Source https://www.mindat.org/photo-569899.html (Mindat-ID A6T-DKY)
Author Modris Baum

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Public domain This work has been released into the public domain by its author, Modris Baum. This applies worldwide.
In some countries this may not be legally possible; if so:
Modris Baum grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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current18:03, 11 March 2019Thumbnail for version as of 18:03, 11 March 20192,116 × 3,276 (5.79 MB)Ra'ike (talk | contribs)=={{int:filedesc}}== {{Information |description= {{en|1= Niveolanite ::Locality: Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada ::The fibers span a bit < 5 mm. Found July 2002. MOB coll. ::This is a lesson in stupidity: A cute little niveolanite “waterfall” on matrix. Except that it’s not on matrix. The fibers reside on a specimen that may be from t...

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