Flinkite, a manganese arsenate hydroxide mineral, was reported from Franklin by Cook (1973) and verified by [Dunn]. It occurs as 0.5-1.0 mm clusters of platy crystals which are very dark yellow-brown with a slightly resinous luster. The composite edges of stacked crystals can appear very dark brown; the pinacoidal surface is much brighter and appears sub-semimetallic in luster. Flinkite occurs associated with jarosewichite, cahnite, hausmannite, and roméite, in vugs in a green andradite/franklinite matrix. Additional descriptive information was provided by King (1993). Flinkite has not been reported from Sterling Hill. (Dunn, 1995)

 Location Found: Franklin
 Year Discovered: 1889
 Formula: Mn22+Mn3+(AsO4)(OH)4
 Essential Elements: Arsenic, Hydrogen, Manganese, Oxygen
 All Elements in Formula: Arsenic, Hydrogen, Manganese, 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   Flinkite

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.668

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.56

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 37, No. 1 - Spring 1996, pg. 19Closest-Packed Mineral Structures of Franklin-Ogdensburg: Kepler's Gift of the Snowflake, Part two of two parts, Paul B. Moore - Flinkite
View IssueV. 34, No. 1 - Spring 1993, pg. 10The Flinkite / Cahnite / Jarosewichite Assemblage From Franklin, New Jersey, Vandall T. King - Flinkite
View IssueV. 13, No. 1 - February 1972, pg. 8Franklin Mineral Notes - Flinkite
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