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Mineralogical ClassificationKingsmountite. Should it be Mn-dominant? And Aluminum Strunzite

20th Aug 2008 00:56 UTCJason B. Smith Expert

So can someone educate me? Based on the type description of kingsmountite (see paper here: http://rruff.geo.arizona.edu/doclib/cm/vol17/CM17_579.pdf) why isnt the mineral Mn dominant based on the amount of MnO detected. Also, if the paper is correct then wouldnt a clearly Mn-dominant kingsmountite be a new species? The original material was found in a more Fe rich environment. Later finds were found with mangangordonite, "whiteite" (is most likely rittmanite), and what is now known to be kastningite, all Mn dominant of course. Can someone clear this up for me.

Also, I believe the aluminum analouge of strunzite has been found at the Foote Mine. One analysis has been completed that shows the Al dominance. The fibers are extremely fine and hairlike though which makes x-ray nearly impossible. Couldnt this mineral be described by analogy to strunzite? Anyone know of someone that could help me out here? I believe this phase has also been found at Silbergrube in Germany and they have the same problem.

Thanks, J.

1st Sep 2008 05:01 UTCErnest H. Nickel

If Ca and Mn occupy the same structural site in kingsmountite, as implied by the chemical formula, then the mineral is clearly Ca-dominant, not Mn-dominant.

Ernie...

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