ADAMITE



Adamite, a zinc arsenate hydrate mineral, was first reported from Sterling Hill by Frondel (1972) and, as cuproadamite, by Cook (1973); it was verified from Franklin by [Dunn]. The material described as eveite by Cook (1973) was reinvestigated and found to be adamite; it occurs as tabular light brown to dark brown microcrystals associated with willemite, franklinite, rhodochrosite, dolomite, spinel, and graphite.
Several specimens have been confirmed by [Dunn] employing X-ray methods, but no physical or optical data exist; Cook (1973) reported the presence of copper substituting for zinc.
Adamite is sparse at Sterling Hill, occurring as spherules and uncommon aggregates and more commonly as green coatings in vein assemblages and as 1-2 mm crystals associated with barite, kraisslite, and allactite. Additionally, adamite is associated with wallkilldellite as finely-fibrous, yellow-green material, perhaps forming as a replacement of an unknown precursor mineral. Additionally, bright pink and deep yellow adamite is known from the 340 level at Sterling Hill. At Franklin, adamite was found as tabular, lath-like to cushion-shaped crystals with gahnite in a vein assemblage. (Dunn, 1995)

 Location Found: Franklin and Ogdensburg
     
 
 Year Discovered: 1866
     
 Formula: Zn2(AsO4)(OH)
 Essential Elements: Arsenic, Hydrogen, Oxygen, Zinc
 All Elements in Formula: Arsenic, Hydrogen, Oxygen, Zinc
     
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1866
     
     
 To find out more about this mineral at minDat's website, follow this link   Adamite

     
 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.653

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.39
The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 14, No. 1 - February 1973, pg. 9Mineral Notes - Adamite/Fluorescent Zincite (small article)
View IssueV. 13, No. 2 - August 1972, pg. 11The Fluorescent Minerals of Franklin/Ogdensburg Area by Frank Z. Edwards - Adamite (Fluorescent Info)
View IssueV. 13, No. 1 - February 1972, pg. 7Franklin Mineral Notes - Adamite
View IssueV. 13, No. 1 - February 1972, pg. 9Franklin Mineral Notes - Adamite (Sterling Hill)
View IssueV. 12, No. 2 - August 1971, pg. 5Geological Notes - Adamite
     
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