Aurorite



Aurorite, a manganous manganic oxide hydrate mineral, occurs as a part of stalactitic, concentric aggregates composed predominantly of bands of coarsely-crystallized chalcophanite from the mud zone at Sterling Hill. It is black, microscopic, extremely fine-grained, and has a dull to earthy luster; it occurs between chalcophanite bands. However, this description is not diagnostic; much fine-grained chalcophanite has the exact same appearance. Partial microprobe analyses indicate it has an approximate composition of (Mn0.7Zn0.3)Mn4+3O7.3H2O. A solid solution series may exist toward the zinc end-member, chalcophanite, but is not evident from the known analyses. It has been verified on but one specimen and has not been found at Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
     
 
 Year Discovered: 1967
     
 Formula: (Mn2+,Ag,Ca)Mn34+O7 · 3H2O
 Essential Elements: Hydrogen, Manganese, Oxygen
 All Elements in Formula: Calcium, Hydrogen, Manganese, Oxygen, Silver
     
 IMA Status: Approved
     
     
 To find out more about this mineral at minDat's website, follow this link   Aurorite

     
 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.584


The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 30, No, 2 - Fall 1989, pg. 3Notes from the Laboratory & Changes to the List of Species From Franklin and Sterling Hill, Pete J. Dunn, John L. Baum, Aurorite
     
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