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: (Ba_0.92K_0.06Na₀.₀₃Ca_0.04)(Fe²⁺ _2.08Mg_0.48Mn_0.20Zn_0.32Cr_0.01)(Al_1.07Ti_0.06Fe²⁺_0.05Fe³⁺_0.06Si_2.13)O₁₀(Cl_1.22F_0.16OH_0.62). 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 Page	Description / Comment
View Issue	V. 29, No. 2 - Fall 1988, pg. 3	Notes 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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