Hauckite is a ferric-iron magnesium manganese zinc sulfate carbonate hydroxide mineral. The original analysis yielded Al2O3 0.5, Fe2O3 6.0, MnO 17.1, MgO 13.2, ZnO 36.0, SO3 7.4, CO2 2.1, H2O 17.7, total = 100.0 wt. %. Carbon and water were not individually determined, and the formula above is tentative.
Hauckite was described by Dunn et al. (1980b) from Sterling Hill and was later found on Franklin material. The crystal structure is unknown.
Hauckite occurs as irregular clusters and rosettes of hexagonal platy crystals and all crystals are severely flattened.
Hauckite is light orange or light yellow, with vitreous luster, perfect cleavage, and a density of 3.02 g/cm3 (meas.), 3.10 g/cm3 (calc.).
Hauckite was found associated with calcite, serpentine, and mooreite in the 935 stope, between the 800 and 900 levels at Sterling Hill.
Additional specimens of hauckite were subsequently found in the same stope near the 700 level, associated with sussexite, pyrochroite, and zincite; hauckite is the last mineral to form. Hauckite was later found in specimens from the 1100 stope on the 900 level associated with pyrochroite and lawsonbauerite, and from the 2350 level in the north orebody associated with chlorophoenicite, calcite and serpentine. It may have been moderately common in small amounts, but overlooked.
Hauckite is also known as a minor component of an intimate mixture of hemimorphite and hydrotalcite, associated with zincite, in a vein assemblage from Franklin. This occurrence was verified by X-ray diffraction only. (Dunn, 1995)

 Location Found: Franklin and Ogdensburg (Type Locality), unique to Franklin/Ogdensburg area
 Year Discovered: 1980
 Formula: Fe33+(Mg,Mn2+)24Zn18(SO4)4(CO3)2(OH)81
 Essential Elements: Carbon, Hydrogen, Iron, Magnesium, Oxygen, Sulfur, Zinc
 All Elements in Formula: Carbon, Hydrogen, Iron, Magnesium, Manganese, Oxygen, Sulfur, Zinc
 IMA Status: Approved
 To find out more about this mineral at minDat's website, follow this link   Hauckite

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.634

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 24, No. 1 - Spring 1983, pg. 5Recent Mineral Occurrences at Sterling Hill, Stephen B. Sanford, Hauckite
View IssueV. 21, No. 2 - September 1980, pg. 6Mineral Notes Research Reports, Hauckite
View IssueV. 21, No. 1 - March 1980, pg. 4A Mineral New To Science, Hauckite
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