FRAIPONTITE



Fraipontite, a zinc aluminum silicate hydroxide mineral of the clay group, was described from Sterling Hill by Cianciulli (1995a) as 1 mm clusters of 0.1 mm, yellow-to-brown, flattened crystals with pearly luster, on a slip surface in franklinite-willemite-calcite ore apparently from the 340 level. Semi-quantitative microprobe analysis by [Dunn] yielded approximate metal ratios for Zn:Mg:Fe:Mn = 66:27:5:2. Fraipontite has not been reported from Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
     
 Mineral Note: Zinalsite, discredited by IMA in 2006 is a synonym of fraipontite.
 Year Discovered: 1927
     
 Formula: (Zn,Al)3((Si,Al)2O5)(OH)4
 Essential Elements: Hydrogen, Oxygen, Silicon, Zinc
 All Elements in Formula: Aluminum, Hydrogen, Oxygen, Silicon, Zinc
     
 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   Fraipontite

     
 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.486
The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 36, No. 1 - Spring 1995, pg. 27Fraipontite From Sterling Hill, New Jersey (small article)
     
No Images at this time.
     





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