PARARAMMELSBERGITE

Pararammelsbergite, a nickel arsenide mineral, was first reported from Franklin by Holmes (1945, 1947) and confirmed by [Dunn] in Oen et al. (1984). Pararammelsbergite is not known from Sterling Hill. It occurs in the nickel arsenide assemblage described under nickeline and rammelsbergite, but is a rare mineral.
Holmes (1945) reported pararammelsbergite to be one of the principal white arsenides in the nickeline assemblage, and Oen et al. (1984) reported it as spongy masses within the calcite gangue, obtained by dissolution of the calcite gangue in acid. Pararammelsbergite has been found as a component of the dendrites using XRD methods. The gangue minerals are sphalerite, calcite, fluorite, and barite. (Dunn, 1995)

Location Found:

Franklin

Year Discovered:

1940

Formula:

NiAs₂

Essential Elements:

Arsenic, Nickel

All Elements in Formula:

Arsenic, Nickel

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 Pararammelsbergite

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.550

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.70

The Picking Table References

	PT Issue and Page	Description / Comment
View Issue	V. 31, No. 1 - Spring 1990, pg. 3	Breithauptite From The Nickel-Arsenide Assemblage at Franklin, New Jersey, Pararammelsbergite (small description)

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