Pyroxmangite



Pyroxmangite is a manganese silicate of the pyroxenoid group and is the high-temperature polymorph of MnSiO3. Pyroxmangite occurs sparingly at both Franklin and Sterling Hill, but has been little studied.
Pyroxmangite is pink to brownish pink, with two good cleavages and vitreous luster. There is no discernible fluorescence in ultraviolet. It is distinguished from rhodonite only by very careful optical or X-ray examination. Locally, rhodonite is by far the preponderant mineral.
At Franklin, pyroxmangite occurs with andradite as massive gray material, which serves as a host for abundant (exsolved?) microcrystals of gahnite. It also occurs, associated with scheelite and fluorapatite, on specimens found on the Trotter Dump in Franklin.
At Sterling Hill, pyroxmangite occurs as light pink massive material associated with tirodite, spessartine, calcite, black willemite, and minor mica, on the 700 level. It has also been found on the 1750 level, as light pink material associated with spessartine, calcite, tirodite, and rhodonite. (Dunn, 1995)


 Location Found: Franklin and Ogdensburg
     
 
     
 Formula: MnSiO3
 Essential Elements: Manganese, Oxygen, Silicon
 All Elements in Formula: Manganese, Oxygen, Silicon
     
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
     
     
 To find out more about this mineral at minDat's website, follow this link   Pyroxmangite

     
 References:
Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.442


The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 18, No. 2 - September 1977, pg. 6New Minerals - Pyroxmangite (small article)
     
No Images at this time.

     





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