ANANDITE



Anandite, a barium iron aluminosilicate. hydroxide mineral of the brittle-mica group, was reported from Sterling Hill by Tracy et al. (1987) and Tracy (1991). It was found in a calcite-augite-willemite-gahnite-biotite-sphalerite horizon, but no additional locality data were given. This anandite is compositionally anomalous, being chlorine-rich, with composition: (Ba0.92K0.06Na0.03Ca0.04)(Fe2+ 2.08Mg0.48Mn0.20Zn0.32Cr0.01)(Al1.07Ti0.06Fe2+0.05Fe3+0.06Si2.13)O10(Cl1.22F0.16OH0.62). Tracy (1991) provided additional analytical data on Ba-containing micas from Sterling Hill. (Dunn, 1995)

 Location Found: Ogdensburg
     
 Mineral Note: Chemical analyses of a brittle mica from Sterling Hill show that it corresponds to the unnamed chlorine analogue of anandite.
     
 Formula: (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2
 Essential Elements: Barium, Iron, Oxygen, Silicon, Sulfur
 All Elements in Formula: Aluminum, Barium, Hydrogen, Iron, Magnesium, Oxygen, Potassium, Silicon, Sulfur
     
 IMA Status: Approved
     
     
 To find out more about this mineral at minDat's website, follow this link   Anandite

     
 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.468
The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 29, No. 2 - Fall 1988, pg. 3Notes from the Laboratory & Changes to the List of Species From Franklin and Sterling Hill, Pete J. Dunn, John L. Baum, Additions to the list, Anandite
     
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