ARSENIOSIDERITE



Arseniosiderite, a calcium ferric-iron arsenate hydroxide hydrate mineral, was first reported by Palache (1935), but this material was shown by Frondel (1972) and Dunn (1979c) to be a Ca-Mn silicate, later described as the new mineral bostwickite (Dunn and Leavens, 1983).
True arseniosiderite was verified from Sterling Hill, using X-ray diffraction methods and a microprobe scan which confirmed Ca, Fe, and As; Mn and Zn are less than 1 wt. % in such material. This arseniosiderite occurred as a light brown to medium brown, microscopic alteration product of franklinite and loellingite in highly calcic ore. It is best verified using X-ray methods. Arseniosiderite is rare and has not been reported from Franklin.
Several arseniosiderite-like unnamed minerals have been found, mostly at Sterling Hill, but they were of too low a quality to permit definition; some may be mixtures. (Dunn, 1995)

 Location Found: Ogdensburg
     
 
 Year Discovered: 1842
     
 Formula: Ca2Fe33+(AsO4)3O2 · 3H2O
 Essential Elements: Arsenic, Calcium, Hydrogen, Iron, Oxygen
 All Elements in Formula: Arsenic, Calcium, Hydrogen, Iron, Oxygen
     
 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   Arseniosiderite

     
 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.658
The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 20, No. 2 - September 1979, pg. 5Contributions to the Mineralogy of Franklin and Sterling Hill New Jersey, Arseniosiderite (small article)
     
No Images at this time.
     





All content including, but not limited to, mineral images, maps, graphics, and text on the Franklin-Ogdensburg Mineralogical Society, Inc. (FOMS) website is licensed under a
Creative Commons Attribution-NonCommercial 4.0 International License.
Creative Commons License