Ferrimolybdite, a ferric-iron molybdate hydrate mineral, was identified using X-ray methods by Parker and Smith (1984) as a yellow powdery mass in a molybdenite-bearing calcium-silicate rock. It occurred as rims around molybdenite crystals associated with powellite and in areas in the enclosing quartz. The specimen is reportedly from Sterling Hill and not Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
 Year Discovered: 1914
 Formula: Fe2(MoO4)3 · nH2O
 Essential Elements: Hydrogen, Iron, Molybdenum, Oxygen
 All Elements in Formula: Hydrogen, Iron, Molybdenum, 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   Ferrimolybdite

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.644

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 25 No. 1 - Spring 1984, pg. 2Sulphur and Ferrimolybdite from Sterling Hill, Ferrimolybdite
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