Chabazite-Ca



Chabazite, a calcium aluminum silicate hydrate mineral of the zeolite group, was reported from Franklin by Frondel (1972) as colorless rhombohedrons associated with stilbite in a vein assemblage.
A remarkable occurrence of chabazite was found in 1990 on the 340 level at Sterling Hill, where it was associated with a Ca-As apatite (possibly johnbaumite), a scapolite (probably meionite), calcite, and a member of the scheelite-powellite series.
Chabazite occurs in 1-2 mm crystals, which are colorless, transparent, and notable in that they have a very bright green fluorescence in shortwave ultraviolet radiation. See also Jenkins (1994). (Dunn, 1995)


 Location Found: Franklin and Ogdensburg
     
 
     
 Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
 Essential Elements: Aluminum, Calcium, Hydrogen, Oxygen, Silicon
 All Elements in Formula: Aluminum, Calcium, Hydrogen, Oxygen, Potassium, Silicon, Sodium
     
 IMA Status: Approved
     
Fluorescent Mineral Properties

 Shortwave UV light: Moderately bright green
 Mid wave UV light: Weak green
 Longwave UV light: Weak green
 Additional Information: The activator is probably uranyl
     
 To find out more about this mineral at minDat's website, follow this link   Chabazite-Ca

     
 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.513. 'Chabazite'

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.49


The Picking Table References
 PT Issue and PageDescription / Comment
V. 57, No. 2 - Fall 2016, pg. 15Fluorescent Minerals of Franklin and Sterling Hill, N.J., Part 1, Richard C. Bostwick - Chabazite
View IssueV. 35, No. 1 - Spring 1994, pg. 21Geology and Mineralogy of a Veinlet Assemblage Associated With Wollastonite-Bearing Rocks, Sterling Mine, Ogdensburg, New Jersey, Robert E. Jenkins II - Chabazite
View IssueV. 33, No. 2 - Fall 1992, pg. 10The Check List of Franklin-Sterling Hill Fluorescent Minerals - Chabazite (Fluorescent Info)
     
Images

     
Chabazite crystals (gemmy tan) on Sterling Hill ore.
Chabazite crystals (gemmy tan) on Sterling Hill ore. Non-fluorescent, field of view about 1cm. Photo by JVF.







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